Ethan Zonca of Protofusion writes: The PogoProg is a small open source hardware pogo pin programming solution. The PogoProg does not need a physical connector on the board, it uses surface-mount pads for signals and thru-holes for alignment. Two standard … Read more
Author Archives: DP
Every Tuesday we give away two coupons for the free PCB drawer via Twitter. This post was announced on Twitter, and in 24 hours we’ll send coupon codes to two random retweeters. Don’t forget there’s free PCBs three times a … Read more
fowkc has just published his latest project the mains frequency display: I wanted to make a display that could show the mains frequency to 3 decimal places. I’d be using the same seven-segment display modules that I used in my UNIX clock, … Read more
Ethan Zonca of Protofusion writes: While developing the Luma RS485-networked LED driver we discovered a need for a small and inexpensive USB to RS485 adapter. We designed an adapter with a FTDI basic UART chip (FT230XS) and an inexpensive TI … Read more
Raj did a review of Dorji’s DSTH01 digital temperature and humidity sensor module: The DSTH01 module is smaller than 0.4″X0.4″ in dimension and operates at 2.1-3.6V power supply. The pull-up resistors for I2C lines are available on board. I tested this sensor … Read more
Kevin Rye designed a simple LED tester: I decide to put together a small LED Tester board. It’ll be powered by a small coin cell battery. I can pick up an LED with a pair of tweezers and just simply … Read more
SUF shared his voltage reference project in the forum: To achieve the things above I designed a small battery good indicator circuit with a zener an opamp two LEDs and a few resistors. If you switch it on and the battery … Read more
We go through a lot of prototype PCBs, and end up with lots of extras that we’ll never use. Every Sunday we give away a few PCBs from one of our past or future projects, or a related prototype. Our … Read more
Ever wonder why your project acts funny and sometimes causes unexpected outcome then one of these reasons are interference and how they inject into or emit from your designs. Learn more about EMC from Atmel’s design consideration notes. The electromagnetic … Read more
This application manual from Murata packs a lot of information about noises generated from most electronics equipment and what are the right filters to suppress these. To make effective noise suppression in electronic equipment it is necessary for design engineers … Read more
The second type of optical sensor, here’s Vishay app note on how do they operate and their considerations when using one of these on your projects. These sensors integrate an infrared emitter and photo detector in a single package. The … Read more
Optical sensor basics and its considering factors of these type of contactless switches, learn more from Vishay’s app note on transmissive optical sensor. These sensors integrate an infrared emitter and photo detector in a single package. The most common types … Read more
Samual posted picture of his Microchip TQFP-100 breakout board PCB build in the forum.
Sick Of Beige basic case v1 (DP6037) is back in stock at Seeed Studio. A clear laser-cut acrylic project case kit that fits DP6037 PCBs (60mmx37mm). Sick of Beige v1 DP6037 project case is available at Seeed for $3.
Every Friday we give away some extra PCBs via Facebook. This post was announced on Facebook, and on Monday we’ll send coupon codes to two random commenters. More PCBs via Twitter on Tuesday and the blog every Sunday. Don’t forget … Read more
Here’s a summary of major developments over the last week. Free PCB Friday is coming up soon. Bus Pirate Demo board free PCB build Sick of Beige basic case v1 (DP5031) and Sick of Beige basic case v1 (DP6037) are back in stock … Read more
Telepresence robot using Microchip PIC16F1829 and Atmel AVR ATmega168 I2C smart DC motor controller microcontroller – Part 2
Ronald of ermicroblog writes: The I2C (read as I square C) smart DC motor controller is designed using the Atmel 8-bit AVR Atmega168 microcontroller and configured to act as the I2C slave device where it could be controlled by other microcontroller or … Read more
Sick Of Beige basic case v1 (DP5031) is back in stock at Seeed Studio. A clear laser-cut acrylic project case kit that fits DP5031 PCBs (50mmx31mm) Sick of Beige v1 DP5031 project case is available at Seeed for $3.
This video by Ben Krasnow discusses how to make your own custom LCD.
An ultrasonic range-finder with haptic feedback called The Bat Hat by Jeff Buswell, Clifford Chou and Andrew Knauss from Cornell University, built as a final project: For our ECE 4760 final project, we designed and implemented an ultrasonic range-finding hat that uses haptic … Read more