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  1. sam.moshiri

    Graphical Temperature & Humidity Control Unit Using a Raspberry Pi Pico

    Raspberry Pi Pico is a cute piece of hardware. It is equipped with a powerful dual-core RP2040 microcontroller that offers 2M (up to 16M) Flash and 264K SRAM memories. Such specifications make it suitable for a variety of hobby and industrial applications. In this article/video, I used a Pico...
  2. sam.moshiri

    High Precision Digital AC Energy Meter Circuit

    Dealing with the 220V-AC mains voltage and measuring the AC loads' true power, voltage, and current parameters are always considered a big challenge for electronic designers, both in circuit design and calculations. The situation gets more complex when we deal with the inductive loads because...
  3. sam.moshiri

    36V-3A Adjustable Efficient DC to DC Step-Down Converter

  4. sam.moshiri

    36V-3A Adjustable Efficient DC to DC Step-Down Converter

    A DC-to-DC converter is one of the most commonly used circuit topologies in electronics, especially in power supply applications. There are three major types of DC-to-DC converters (non-isolated): Buck, Boost, and Buck-Boost. Sometimes a buck converter is also called a step-down converter and a...
  5. sam.moshiri

    3-Wires/4-Wires FAN Control and Over Temperature Protection using LM35 and ATTiny13

    Proper thermal dissipation is an essential rule for nowadays electronics. The best operating temperature for the electronic components is 25 degrees (standard room temperature). Thermal dissipation in some commercial devices is not done properly which affects the lifetime and performance of the...
  6. sam.moshiri

    3-Wires/4-Wires FAN Control and Over Temperature Protection using LM35 and ATTiny13

    Proper thermal dissipation is an essential rule for nowadays electronics. The best operating temperature for the electronic components is 25 degrees (standard room temperature). Thermal dissipation in some commercial devices is not done properly which affects the lifetime and performance of the...
  7. sam.moshiri

    LNK304 Transformerless Power Supply

    Whenever you hear the transformerless supply term, you initially imagine the capacitor-based solution, which means a high voltage capacitor in series with the mains line, then a bridge rectifier, a Zener diode, a filtering capacitor, and so on. Such a circuit is not just able to deliver...
  8. sam.moshiri

    Ultrasonic Distance Measurement Using Arduino

    An ultrasonic range finder is a useful tool in a variety of real-life and robotic applications, such as in obstacle avoidance and distance measurement systems. The ultrasonic range finder measures the distance by emitting a 40KHz pulse of ultrasonic sound that travels through the air until it...
  9. sam.moshiri

    Double Lithium-Ion/Lithium-Polymer USB Type-C Charger

    Nowadays, Lithium batteries are used extensively in portable devices, such as cellphones, laptop computers, electronic gadgets, … etc. There is a standard industry-defined procedure (cycle) for charging the lithium-ion/lithium-polymer batteries, otherwise, the lifetime of the batteries is...
  10. sam.moshiri

    A Portable White Noise Generator Circuit

    The white noise generator circuit is a handy tool that can be used to examine the circuit or a communication line under some random noises to make sure about the stability of the device in real and harsh environments. The current consumption of the device is low, so you can power the circuit...
  11. sam.moshiri

    Cooling FAN Controller Using an LM35 (No MCU)

    The high temperature of the power components is a known phenomenon in electronics. To overcome this challenge, the designers mount heatsinks on the components to dissipate the heat, however, in many commercial and home appliance devices, the embedded heatsink is not adequate and the air must be...
  12. sam.moshiri

    0-30V, 0-7A Adjustable Switching Power Supply [CC-CV, with LED]

    DC to DC buck converters is a famous topology in the electronic and a widely used circuit in electronic devices. A buck converter steps down the input voltage while it increases the output current. In this article/video, I have discussed a DC to DC buck converter that can be used effectively as...
  13. sam.moshiri

    Easy and Compact 555 Dual LED Flasher [Altium Schematic + PCB]

    Many electronic beginners are afraid of designing SMD boards and just stick to through-hole and dip components. The reason for this could be using the wrong electronic designing CAD software. This video intends to handle you a complete, although a simple example of a project using both SMD and...
  14. sam.moshiri

    DC to DC Boost Converter using UC3843

    DC to DC converters are quite popular among electronic enthusiasts and are widely used within the industry. There are three major types of non-isolated DC to DC converters: buck, boost, and buck-boost. In this article/video, I used there major components such as the famous UC3843 chip, a power...
  15. sam.moshiri

    Infrared Remote Control Decoder & Switcher Project

    Infrared signal of the tested remote (SONY)
  16. sam.moshiri

    Infrared Remote Control Decoder & Switcher Project

    Infrared remote controllers are everywhere around us. The majority of home appliances are controlled using infrared remote controls. In this article/video, we learn to build a device that can decode (almost) any IR remote control and use the instructions to switch the relays (loads). So we can...
  17. sam.moshiri

    A Strange Problem with Xiaomi Redmi (MI) AirDots Bluetooth Earphones!

    Does anybody know what's the problem with this earphone? so weird!
  18. sam.moshiri

    Active Low Pass Filter Circuit Analysis using Siglent SDS2102X Plus Oscilloscope [Part-1]

    In this video, I explain some theories behind a low pass active filter circuit, then I built a simple active low pass filter using the LM358 opamp. I tested the filter's behavior using the Siglent SDG1025 waveform generator and the Siglent SDS2102X Plus oscilloscope.
  19. sam.moshiri

    USB to UART Converter using Microchip MCP2200

    Nowadays USB port is used widely for data transactions between electronic devices and computers. In many scenarios, there is no need to communicate with the USB port directly, therefore electronic designers use USB to UART (RS232-Serial) converter chips, so the USB port is converted to a virtual...
  20. sam.moshiri

    DSN-VC288 Voltmeter-Ammeter Review Using The Siglent SDM3045X Multimeter

    In this video, I have reviewed the DS-VC288 panel mount voltmeter/Ammeter using the Siglent SDM3045X benchtop multimeter. The VC288 meter did not present acceptable readings, especially in the current measurement. It uses an LM358 Opamp which is not suitable for this purpose and it does not show...
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