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Everything posted by loribennms

  1. I have a simple wifi question. I have an outdoor IP security camera and it is connected to one of my WiFi access points for ease of use and convenience. It is working well except that the wifi link is not optimum. It gets disconnected sometimes although this wasn't a problem before but it is now and I don't know why the link deteriorated. Anyways, I want to improve this link by using a directional wifi antenna. So, is it just a matter of getting a directional yagi like antenna with a good gain--instead of the regular omni-directional one -- and point it toward the access point and be done with it? Or is it more involved?
  2. Hello all. I am trying to use Pixy2 with the Portenta H7 Lite, and the camera is working fine on the main core M7 (for example “getBlocks()”). However, when I switched its use to the secondary core M4, everything compiled with no issues, but at run time, as soon pixy.init() gets activated, just no response from the camera. However, during this time, PixyMon still shows that the camera is working normally. Has anyone tried this use configuration? Thank you for any pointers.
  3. Hello, I recently came across the E73-2G4M08S1EX wireless Bluetooth modules, which boast compact size and low power consumption. These modules utilize the nRF52833 RFIC from NORDIC, supporting a wide range of wireless protocols including Bluetooth 5.1, Bluetooth mesh, 802.15.4, Thread, Zigbee, and proprietary 2.4 GHz protocols. The chip itself features a powerful ARM CORTEX-M4 core, employs a 32M industrial-grade crystal oscillator, and offers various peripheral resources such as UART, I2C, SPI, ADC, DMA, and PWM. The module also exposes most of the nRF52833's IO Ports for versatile development, as outlined in the pin definitions. It's important to note that the E73-2G4M08S1EX serves as a hardware platform without pre-loaded firmware. Users are required to undertake a secondary development. The nRF52833 chip's characteristics are detailed in the official Datasheet. The module optimally leverages the RF capabilities of the chip. Please refer to the provided image for a visual representation of the module. Additionally, the E73-2G4M08S1EX features an embedded ARM MCU. However, other serial ports such as JTAG, ISP, and ICP are not available for downloading purposes. When it comes to firmware burning, the process should be completed in two parts. Since the protocol stack provided by NORDIC is not included in the program, during the second phase of development, you'll need to use the official burning tool, nRFgo Studio, to burn the protocol stack. Subsequently, nRFgo Studio can be used to burn the hex of the application code. Alternatively, you can also opt to use nRFgo Studio to burn the protocol stack and then proceed to download it using IAR or KEIL. The E73-2G4M08S1EX modules find applications in various domains such as smart homes and industrial sensors, security systems, positioning systems, wireless remote controls, drones, wireless game remote controls, healthcare products, and even automotive industry applications.
  4. The FET3588-C System on Module (SoM) is powered by Rockchip's advanced hybrid processor, the RK3588, which combines quad-core Cortex-A76 and Cortex-A55 cores. The A76 core can reach speeds of up to 2.4GHz, while the A55 core can clock up to 1.8GHz. This processor boasts a super advanced engine that can handle 8K output and support quad-screen displays with different content outputs. One of the standout features of the Rockchip RK3588 is its 8K video codec capability, enabling support for various video codec formats. The ISP3.0 can handle impressive 48MP image processing, and the SoM offers various video outputs at up to 8K resolution with a refresh rate of 60Hz. In terms of connectivity, the FET3588-C SoM offers 4 PCIe3.0 and 3 PCIe2.1 interfaces, capable of achieving speeds of up to 8Gbps. Additionally, it comes with multiple USB3.1 Type-C ports, which can also support SATA3.1 for fast data transfer. The SoM has undergone rigorous ambient temperature testing, ensuring its reliability and suitability for high-end applications and products. If you are seeking a trustworthy and high-performance option for your advanced projects, the FET3588-C System on Module with Rockchip's RK3588 processor could be an ideal choice. (Note: The provided image file name suggests an image associated with the mentioned features, but the image itself is not displayed in this text-based response.)
  5. If you're looking for someone to work with you on the project, you may consider reaching out to colleagues, friends, or professional writers who have expertise in the subject matter. You can also use online platforms to find freelance writers who can collaborate with you on your project and ensure it meets your deadlines and quality expectations.
  6. Wow, your teammate's open hardware project sounds fascinating and environmentally impactful! Creating a bee hotel for native bees and integrating it with advanced technology like the Particle Argon, solar panels, and PIR sensors is such a great initiative. The solar cells choice, using IXYS KXOB25 series, is impressive considering their reflowability and parallel connection to maximize power output. And the LTC3105EDD 15 energy harvesting IC with its 250mV startup voltage seems like a promising choice to ensure power availability even during challenging conditions like dawn, dusk, or cloud cover. The integration of PIR sensors along the bee tubes to gather bee traffic data and build a country-wide bee traffic map is a brilliant idea. By using infrared transmitters and receivers, the team can determine the direction in which bees are going (in or out of the tube). The efficient power management through low-side MOSFET and PWM techniques is commendable, as it will help conserve energy and extend the device's lifespan. The future steps sound exciting as well, with the team planning to run a small tflite model on the Particle hardware to identify the type of bee based on a short audio sample. Moreover, sending this data to a central server hosted by Particle for analysis and monitoring adds another layer of sophistication to the project. Regarding the unknowns, the team's idea to use Edge Impulse for the tflite model and Particle cloud for central server hosting sounds promising. While there might be some uncertainties, the forums and the community can provide valuable insights and support. Overall, this project has immense potential to contribute to our understanding of native bees' behavior and play a significant role in supporting pollinator conservation efforts. I'm looking forward to seeing the progress and results of this fantastic initiative! If there are any updates or further developments on the project, please keep us posted. And if anyone else has experience with similar projects or expertise in setting up Particle cloud for a large number of provisioned devices, your input would be highly appreciated. Let's support this endeavor and contribute to the conservation of our precious pollinators!
  7. Hi, I am about to take my journeyman certification test here in California and eventually would like to start my own business. I am aware that in California, you need 4 years of journey-level experience. I have an associates in Electrical Construction and Maintenance which the CSLB said they would give me 1.5 years of experience. Plus I currently have 1.5 years of "journey level experience," as the CSLB requires. So just about a year left!!! My question is in regard to estimating software. I know this is premature for my situation but I wanted to know what EC's out there use for software and approximate prices. In school, we used ConEst software, which seemed pretty easy to navigate and I believe it updated itself for current material pricing. So what do you guys use? thanks for any help
  8. The power supply design utilizes an RM8 ferrite core transformer, which is different from the more commonly used EE or EI cores. You have included a small potentiometer to adjust the output voltage within the range of 7.5V to 8V. For the schematic and PCB design, you used Altium Designer 23 and collaborated with friends using Altium-365 for feedback and updates. Octopart helped you quickly obtain component information and generate the Bill of Materials (BOM). To ensure high-quality fabrication, you sent the Gerber files to PCBWay. You have tested the power supply for voltage drop, current delivery, output noise, and load step response using various equipment such as a DC load, oscilloscope, multimeter, and current probe from Siglent. Based on your tests, you are confident that this circuit will meet the requirements for a compact and efficient power supply, providing reliable performance on an electronics bench. Please note that I'm unable to view the actual article or video you mentioned, but I've provided a summary based on the information you provided.
  9. Please help My Coleman ac unit compressor keeps shutting off after about 4 hours and blows hot air. The outside temp has been in the mid 90's. This has been one of my biggest concerns when leaving my dogs alone while I am at work and this nightmare happened fortunately while I was home otherwise my dogs would have perished. I am looking for suggestions for a portable ac unit or evap cooler to use instead of the Coleman ac unit so I don't have to worry about the pups when I am at work. thanks for any help
  10. Building an analog circuit to connect your sound detector board directly to a speaker can be a fun project. Here are some general steps to help you get started: Understand the Sound Detector Board: Take some time to study the datasheet and documentation of the Sound Detector board you have. This will provide valuable information about its pinout, voltage requirements, and signal outputs. Determine Speaker Requirements: Identify the specifications of the speaker you plan to use, such as impedance (measured in ohms) and power rating (measured in watts). This information will be crucial in designing the analog circuit. Design an Amplifier Circuit: To amplify the audio signal from the sound detector board and drive the speaker, you'll need to design an amplifier circuit. Depending on the power requirements and complexity of your project, you can choose from various amplifier configurations, such as a basic transistor amplifier or an op-amp-based amplifier. You can find amplifier circuit schematics and tutorials online or consult electronics resources. Connect the Sound Detector Board: Connect the analog output of your sound detector board to the input of the amplifier circuit. Ensure that the voltage levels and impedance are properly matched between the two components. Connect the Speaker: Connect the output of the amplifier circuit to the speaker. Take care to connect the positive and negative terminals correctly to avoid phase cancellation or distortion. Test and Troubleshoot: Power up the circuit and test the audio output. Adjust the volume and gain settings as needed. If you encounter any issues, double-check the connections, component values, and polarity. Remember, working with electronics involves certain risks, such as electrical shock or damage to components. Take appropriate safety precautions and ensure that you have a good understanding of basic electronics principles. If you're new to electronics, it may be helpful to consult an experienced hobbyist, join online forums, or consider seeking guidance from a local electronics club or community. Please note that while I can provide general guidance, it's always recommended to consult specific resources and seek expert advice when working on electronics projects.
  11. Your hard work is commendable. When it comes to achieving a fading effect, I typically rely on Arduino or AVR microcontrollers. Utilizing the PWM pins of an Arduino makes the process quite straightforward. However, creating a project of this scale, compactness, and functionality without any programming requires exceptional skills. You've done an impressive job.
  12. Your project idea of creating a PCB with multiple USB-C inputs and outputs to visually confirm if a tablet or laptop is properly connected sounds interesting. To determine if a device is connected to the USB-C cable, you can use a combination of voltage sensing and communication protocols. Here are a few suggestions: Voltage Sensing: As you mentioned, you can use an Arduino to monitor the voltage drop across the USB-C pins when a device is connected. The USB-C connector uses specific voltage levels, such as 5V or 20V, for charging or data transfer. By measuring the voltage levels, you can determine if a device is properly connected or not. However, it's essential to refer to the USB-C specification and understand the specific pin assignments and voltage levels for your project. USB PD (Power Delivery) Protocol: USB PD is a communication protocol used in USB-C connections to negotiate power requirements and capabilities between devices. By utilizing USB PD communication, you can establish a handshake with the connected device and receive confirmation signals or information about the power status. This method provides more reliable and accurate detection of device connection. USB Data Communication: Another approach is to establish a basic USB data communication link with the connected device. You can use the Arduino or a microcontroller to send and receive data over USB to confirm device connectivity. By implementing a simple communication protocol, you can exchange signals or information that indicate the successful connection of the device. Consider combining the above approaches based on your project requirements and the capabilities of the devices you are connecting. It's important to refer to the USB-C specification, study the pin assignments, voltage levels, and communication protocols to ensure compatibility and accurate detection. When designing your PCB, ensure proper isolation and protection circuits to prevent any potential damage to the connected devices. It may be beneficial to consult with an experienced electrical engineer or seek guidance from relevant online communities specialized in USB-C and electronics projects to ensure the best design practices and safety considerations.
  13. Thank you for sharing information about your project, the Pika Power Board. It seems like a versatile and useful power supply solution, especially for electronics enthusiasts and learners. The features you mentioned, such as multiple input options, adjustable outputs, high current supply, and short circuit protection, make it a valuable tool for various applications. The Pika Power Board's compatibility with breadboards and its ability to provide different output voltages simultaneously are also beneficial for prototyping and experimenting with Arduino/microcontroller projects. The inclusion of separate LED indicators for each output adds convenience for monitoring the power status. The practical testing results and thermal assessment you provided demonstrate the board's performance under different load conditions and its ability to maintain stable output voltages. This helps potential users understand the capabilities and reliability of the Pika Power Board. For those interested in your project, you have provided a link to the Crowd Supply campaign where they can find more details and sign up for updates. This allows them to stay informed about the launch and any relevant information regarding the Pika Power Board. Overall, it appears that you have developed a well-designed power supply solution that addresses the needs of various users, from learners and hobbyists to professionals working on electronics projects. Good luck with your project!
  14. Yes, it is possible to build a circuit to convert an NTC 10 kiloohm (B=3950) signal into an output voltage that corresponds to the measured temperature. A buck/boost converter can be used along with a coil and capacitor to achieve the desired voltage range (4V to 12V DC). However, it is also possible to use a ready-made chip that can provide a maximum output voltage of 12V DC, which would simplify the circuit design. To linearize the NTC and process the voltage, the TLV9002 from TI can be used. It is a suitable operational amplifier for this purpose. To complete the circuit, you will need to incorporate additional components such as resistors, capacitors, and possibly a voltage regulator, depending on the specific requirements of your design. It is recommended to consult relevant datasheets and reference designs to ensure proper functionality and stability of the circuit. By using classical building blocks and a limited number of components, you can achieve your goal without the need for programming, software, Arduino, or PLSOC.
  15. That sounds like an interesting project! Using an RP2040 Zero board, a VL53L0X Laser time-of-flight ranging sensor, and a 2.4" TFT display to build a graphical laser rangefinder unit opens up various possibilities for distance monitoring and other applications. The VL53L0X sensor is a popular choice for measuring distances using time-of-flight principles. It can provide accurate distance measurements within a certain range. By integrating this sensor with the RP2040 Zero board and the TFT display, you can create a visual representation of the distance measurements. Additionally, the inclusion of a relay and a buzzer allows for further functionality. The relay can be used to activate or deactivate external devices, such as pumps or brakes, based on the distance measurements obtained from the rangefinder. The buzzer can provide acoustic signals or alerts related to the distance readings, allowing for a more interactive user experience. Overall, your project seems to provide a versatile solution for distance monitoring and control applications. It can be used for various purposes, including liquid level monitoring, proximity sensing, or triggering actions based on distance thresholds. If you have any specific questions or need further assistance with your project, feel free to ask!
  16. Thank you for providing the information about the DR-AP40X9-A high power Radio AP Router developed by Wallys Communications. It appears to be a 2x2 2.4G&5G router based on Qualcomm chips, specifically the IPQ4019/4029. The router includes two 2.4G&5G dipole antennas with a 5dBi gain, SMA Plug interface, and RoHS compliance. The enclosure is made of aluminum alloy and supports the WallysDR40X9 board. The IPQ4019/4029 board offers a long wireless transmission range, up to 10.5 kilometers on the 2.4 GHz frequency and up to 20 kilometers on the 5 GHz frequency. The integrated omni-directional antenna ensures reliable communication between devices, even when located in different areas of a room. The dipole antenna configuration is particularly suitable for shorter distances or when multiple access points are in close proximity, such as within the same building or across different buildings. If you have any specific inquiries or further details you would like to discuss, please let me know.
  17. Building an analog circuit to connect the audio sensor board directly to a speaker is possible. However, it's important to note that the specific implementation will depend on your project requirements and the capabilities of the audio sensor board. Here are some general steps to consider: Review the datasheet: Familiarize yourself with the specifications and features of the audio sensor board. Understand its analog and digital outputs, sensitivity levels, and any recommended circuitry. Determine the speaker requirements: Check the specifications of the speaker you intend to use, such as impedance (measured in ohms) and power rating. This information will help in designing the appropriate circuit. Design the analog circuit: Based on the audio sensor board's analog output, you'll need to design a circuit that conditions the signal and amplifies it to a level suitable for driving the speaker. This typically involves using operational amplifiers (op-amps) or audio amplifier chips. Build and test the circuit: Gather the necessary components, such as resistors, capacitors, and op-amps, as per your circuit design. Construct the circuit on a breadboard or a custom PCB, following proper wiring and component placement techniques. Test the circuit using the audio sensor board and the speaker. Adjust and optimize: Fine-tune the circuit parameters, such as gain and filtering, to achieve the desired audio quality and performance. Make any necessary adjustments to meet your project requirements. Please note that designing analog circuits requires a good understanding of electronics and circuit design principles. If you're not familiar with electronics or have limited experience, it might be beneficial to consult with an experienced electronics engineer or seek help from online communities and forums specialized in electronics and DIY projects. Additionally, it's worth considering the limitations and capabilities of the audio sensor board you mentioned. If you find that it doesn't meet your specific requirements or lacks the necessary analog output, you may need to explore alternative sensor options or use additional components to interface with the board. Good luck with your project!
  18. It seems like you have provided a detailed description of your implementation of a power supply using the TPS54202 chip. The information you shared includes the key features of the chip, the design techniques you applied, the tools and resources you used for schematic and PCB design, as well as the testing equipment and components you utilized. While I don't have access to view the specific schematic, PCB design, or external references you mentioned, it appears that you have put considerable effort into ensuring a low noise level and high performance for your power supply. Your choice of Altium Designer for design and collaboration, Octopart for component search, and PCBWay for fabrication demonstrates a well-rounded approach to the project. Testing the circuit for output noise and load step response using quality equipment like the Siglent oscilloscope and DC load adds confidence to its performance. Overall, it seems like you have created a compact and efficient power supply for use on an electronics bench. If you have any specific questions or require further assistance regarding your power supply implementation, feel free to ask.
  19. The provided code demonstrates how to build an efficient overload motor protection system using an Arduino and a current sensor. It monitors the motor's current and triggers a protective action if an overload is detected. Here's a breakdown of the code: cpp #define Relay A1 int analogPin = A0; // Current sensor output long int sensorValue = 0; // variable to store the sensor value read void setup() { Serial.begin(9600); // setup serial pinMode(Relay, OUTPUT); } void loop() { sensorValue = analogRead(analogPin); // Read the analog value from the current sensor delay(200); // Wait for 200 milliseconds Serial.println("ADC Value: "); Serial.println(sensorValue); // Print the sensor value to the serial monitor // Set the threshold value at which you want to switch off the motor // In this example, if the sensor value exceeds 550, the motor will switch off for 5 seconds if(sensorValue > 550) { digitalWrite(Relay, LOW); // Switch off the motor delay(5000); // Delay for 5 seconds } else { digitalWrite(Relay, HIGH); // Keep the motor running } } In the setup() function, the serial communication is initiated with a baud rate of 9600, and the Relay pin is set as an output. In the loop() function, the analog value from the current sensor is read using analogRead(). The sensor value is then printed to the serial monitor for monitoring purposes. If the sensor value exceeds the defined threshold of 550, the relay pin is set to LOW, turning off the motor. The delay of 5 seconds is applied to keep the motor off for that duration. If the sensor value is below the threshold, the relay pin is set to HIGH, allowing the motor to continue running. Make sure to properly connect the current sensor to the Arduino, and adjust the threshold value according to your motor's specifications and desired protection leve
  20. Hi, Recently I had trouble with my digital cable "box" (Motorola from Comcast) and a service man came. Unfortunately, I didn't see everything he did, but when I came in the room, he had a service mode menu display on the TV. I am familiar with service mode menus in televisions which require a certain sequence of key presses to access. Does anyone know how to access the service mode menu of the Motorola digital cable box? thanks in advance for any help
  21. Combining the darkness sensor circuit and the motion detector circuit into one requires integrating the functionalities of both circuits. Here's a possible approach to achieve the desired output: Start by connecting the power and ground connections for both circuits to a common power source, ensuring they share the same ground reference. Connect the LDR (darkness sensor) to pin 2 of the 555 timer IC from the darkness sensor circuit. This connection will determine whether the motion detector should be enabled or not based on the darkness level. Connect the output signal pin (pin 13) of the PIR motion sensor to an input pin of the 555 timer IC (e.g., pin 12). This connection will provide the motion detection signal to the combined circuit. Determine which output you want to trigger based on the conditions (darkness and motion). You can use any available output pin on the 555 timer IC for this purpose. Use logical gates (such as AND or NAND gates) to combine the darkness sensor input and the motion sensor input. Connect the LDR output to one input of the gate and the PIR output to the other input of the gate. The output of the gate will be connected to the chosen output pin of the 555 timer IC. Ensure that the chosen output pin is connected to the desired output device (e.g., LED, buzzer, etc.) through appropriate resistor values. Test the combined circuit to verify if it functions as intended. Make any necessary adjustments or optimizations based on the desired behavior. Please note that this is a generalized approach, and the specific implementation may depend on the available components and circuit requirements. It's recommended to have a good understanding of circuit design and the datasheets of the components used to ensure correct connections and proper functioning.
  22. To install Home Assistant on a Raspberry Pi 4, follow these steps: Download the Home Assistant OS image for Raspberry Pi 4 64-bit from this link: Install the Raspberry Pi Imager tool and open it. Select the downloaded OS image in the Imager tool. Choose the connected Micro SD card as the storage. Click "Write" and wait for the process to complete. Eject the Micro SD card and insert it into the Raspberry Pi's card slot. Connect the LAN cable to the Ethernet port of the Raspberry Pi. Power on the Raspberry Pi and wait for it to boot and update (this may take some time). Open a web browser and go to or use the IP address of your Raspberry Pi if the standard URL is not working. Follow the on-screen instructions to set up and configure Home Assistant, including creating an account, choosing location settings, and integrating smart devices. Once the setup is complete, you can customize your Home Assistant dashboard, add smart home devices, and automate your home based on your preferences. Remember to explore the various add-ons and integrations available in Home Assistant to enhance its features and compatibility with different smart home devices. Note: The provided instructions are a summary, and it's recommended to refer to the official documentation or guides for detailed steps and troubleshooting
  23. It sounds like you have put a lot of effort into designing and implementing your power supply using the TPS54202 buck converter. Your choice of components, such as input and output filters, along with PCB design techniques, demonstrates your commitment to achieving low noise levels and high performance. Utilizing Altium Designer 23 and Altium-365 for schematic and PCB design collaboration is a smart choice. Octopart's component search engine and generating the Bill of Materials (BOM) streamlined your component selection process. Sending the Gerber files to PCBWay ensures high-quality fabrication. Testing the circuit for output noise and load step response using Siglent oscilloscope and DC load adds credibility to your design's functionality. Overall, your dedication to creating a compact and efficient power supply for electronics applications is commendable. It seems like you have taken all the necessary steps to ensure reliable performance on your electronics bench.
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