w2aew @ youtube.com writes:
A tutorial on the basics of an inverting and non-inverting summing amplifier using an op amp. The video assumes a basic knowledge of how inverting and non-inverting amplifiers using op amps work. If you are unfamiliar with this, I’d recommend viewing my video on how to easily understand the operation of most opamp circuits: https://www.youtube.com/watch?v=K03Rom3Cs28
Basics of an Op Amp Summing Amplifier - [Link]
ISPnub is a simple to use stand alone programmer intended for flashing AVR controllers in the field directly in the target system or during production. The module has only one button and two leds as user interface.
- No external power supply needed. Uses voltage provided by target (1.8V to 5.5V).
- Programming counter. Limit possible programming cycles. After allowed cycles, no further programming is possible (module has to be erased/reprogrammed).
- One-button-programming: connect – push button – wait for red led off.
- Simple LED schema:
- green on = ok
- green blink = counter expired
- red on = programming
- red blink = error
- Define programming with simple script. Script converter generates HEX file for module.
- Load module with any ISP programmer which supports ATmega1284p
- 120kB memory space for programming data
ISPnub – Stand-alone AVR In-System-Programmer Module - [Link]
Ray Wang @ youtube.com writes:
This is Part 2 of the NeoDen Tm-240A pick and place machine demo. This time I am using it for a production run to assemble the OpenSprinkler Pi circuit board. Details can be found in this blog post: http://rayshobby.net/?p=6688
NeoDen TM-240A Automatic Pick and Place Machine Demo - [Link]
In the first of a series of videos tutorials on microphones, Doug Ford, former head designer at Rode Microphones explains the basics of how microphones work, the different types – carbon, dynamic, ribbon, condensor/electret, and how the omnidirectional pattern works. Also, the internal construction of a high end measurement microphone.
EEVblog #602 – Introduction to Microphones - [Link]
The MAX31730 temperature sensor monitors its own temperature and the temperatures of three external diode-connected transistors. The operating supply voltage is from 3.0V to 3.6V. Resistance cancellation compensates for high series resistance in circuit-board traces and the external thermal diode, while beta compensation corrects for temperature-measurement errors due to low-beta sensing transistors.
MAX31730 – 3-Channel Remote Temperature Sensor - [Link]
A solar charge controller regulates the voltage and current coming from your solar panels which is placed between a solar panel and a battery .It is used to maintain the proper charging voltage on the batteries. As the input voltage from the solar panel rises, the charge controller regulates the charge to the batteries preventing any over charging.
Arduino Solar Charge Controller (PWM) - [Link]
Syst3mX @ instructables writes:
One day I was sitting behind my desk at work and I got that weird need to build something, after looking around for a bit I got my eye on an LED matrix and that sparked an idea in my head : “I WANNA MAKE A TAMAGOTCHI”.
So for those of you that don’t know what the heck is a Tamagotchi here is a little snip-it from wikipedia :
“The Tamagotchi (たまごっち Tamagocchi?) is a handheld digital pet, created in Japan by Akihiro Yokoi of WiZ and Aki Maita of Bandai. It was first sold by Bandai in 1996 in Japan.”
So my take on this classic toy is to make it in to a desktop gadget with an LED matrix for a display, and an Arduino for brains to make it more accessible to people. With that said join me as we design,build and program the World’s first (As far as I know) desktop Tamagotchi.
Make a Desktop Tamagotchi - [Link]
rahulkar @ instructables.com writes:
This is a complete DIY project which requires a handful of components such as the ATtiny 85, LM35, MAX7219 and a couple of resistors and capacitors running off a regulated 5 V supply.
Temperature Measurement Range : 0 to 150′C / 32 to 300’F
Controller: ATtiny 85
Display type – 4 digit multiplexed 7 segment display (Common Cathode type)
Programming Language: Arduino
The setup can display both in Celsius and Fahrenheit. By default the temperature is shown in Celsius but can be toggled to display in Fahrenheit using the push button.
7 Segment Digital Thermometer using ATtiny 85 - [Link]
jollifactory @ instructables writes:
Here, we show how a 7 Bi-color 8×8 LED Matrix Scrolling Text Display is built, in which messages and commands can be sent to it via Bluetooth using an Android Smart Phone. Logically, any devices capable of sending text messages via Bluetooth may be adapted to work with the display.
To build this project, basic electronics component soldering skills and some knowledge on using the Arduino or Arduino based micro-controllers are required.
The reason for building a 7 LED Matrices long display is that it is quite adequate for ease of reading scrolling text and also because the largest tinted acrylic sheet easily available in Hobby or Art shops is 18 inches by 12 inches, which is just the right length for making the enclosure for the display as each LED matrix is around 60mm x 60mm in size.
7 Bi-color LED Matrix Scrolling Text Display - [Link]
Saelig Co. Inc. (www.saelig.com) has introdcued an economical 7″ WinCE 6.0 500MHz TouchPanel HMI PC. A rugged design, multiple interfaces, low consumption, economical price (under $300) make this an attractive touch-input HMI controller featuring an optional built-in rechargeable battery and lots of I/O. http://www.saelig.com/pr/gk7000.html
Rugged design, multiple interfaces, low consumption, economical price make this an attractive touch-input controller
Fairport, NY: Saelig Company Inc. (www.saelig.com) has introduced the GK-7000 TouchPanel PC to provide commercial customers with a rugged Industrial Control Panel that it is attractively housed, has multiple I/O connections, and is simple to install. Running Windows CE 6.0 and featuring an optional built-in rechargeable battery, the GK-7000 is ideal for embedded applications in environments where power is intermittent. Not only will customers appreciate the reliability and functionality of the GK-7000, but the price point is highly competitive, greatly reducing the total cost of an embedded computing project.
The GK-7000’s 7″ 800 x 480 TFT color display features a four-wire resistive touch panel. The GK-7000 is a high performance embedded controller which features a Samsung ARM-based S3C2416 processor with Microsoft’s Windows CE 6.0 operating system. With the built-in 32bit 500MHz processor, the unit can be powered from regulated 9-12V, with consumption at an extremely low 8 watts. The GK-7000’s features of rugged design, multiple interfaces, low consumption and high reliability allows designers to appreciate its reliability and functionality, as well as recognizing the highly competitive pricing that makes adding an HMI feature to a product quite affordable.
Built-in interfaces in the GK-7000 TouchPanel PC include: USB1.0 x 3, USB2.0 x 1, RS232, RS485, SD slot (for up to 8GB memory), 10/100 Ethernet mouse/keyboard support, and built-in speaker for audio output. Optional extras include: 802.11 b/g Wi-Fi, GSM/GPRS, Bluetooth, VESA 75mm rail-mount, and a 2000 mAH battery.
With compact dimensions of 7.9” x 6.0” x 2.0” and light weight of 1.14lb without battery, 1.34lb with battery, the GK-7000 will see use in a variety of equipment design areas. The GK-7000 is ideal for applications in the vehicle, service, or retail industries, industrial machine operation, video conferencing, or point-of-sale kiosks. The GK-7000 is designed for an operating temperature range -4°F to +140°F.
Manufactured in the Far East by Lilliput Electronics Co., Ltd, a leading supplier of LCD displays, embedded computer systems, and other innovative products, the GK-7000 TouchPanel PC is available now from the USA distributor Saelig Company Inc.
Saelig Debuts Economical 7” WinCE 6.0 500MHz TouchPanel PC - [Link]