Mang Ou-Yang and his team at National Chiao-Tung University have developed a wearable pupillometer. It could detect dangerous diabetic condition earlier: Compared to the existing diagnostic techniques, the pupillometer is a more reliable, effective, portable and inexpensive solution for diagnosing … Read more
Author Archives: DP
Timofte Andrei wrote this instructable detailing the build of his Arduino home automation system: For this project I’ve used: 1. An Arduino clone 2. SIM900 GSM SHIELD 3. Relay module 4. 2×16 LCD Display 5. DS18B20 temperature sensor 6. Push button 7. … Read more
Ethan of Protofusion designed and built a stereo vacuum tube amplifier based off of the TubeLab SimpleSE design.
Jechavarria writes, “Here you can find the last board I develop on DirtyPCB. I’m very happy with the results!” Via the project log forum.
A power supply build by Rajkumar of Electronics Lab: This project is a solution to power up most of devices or projects requiring dual (+/-12V) power supply. Symmetric +/-12 VDC power supply has been designed for audio applications, can power up microphone … Read more
Zoltán of PakaHuszar is working on a SG90 servo controller: The original idea was the following: TI Launchpad + SG90 servo, connected to a PC via USB port and it can be controlled from there.
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
Electronics DIY published a new build, the Curious C-beeper: Curious C-Beeper is a fun to build little probe that can be used to quickly detect the capacity of capacitors in pF nF range, test their stability with temperature changes, find broken … Read more
Shenzhen is the hot geek destination right now. Since the hacker camp last spring, it seems like there are at least 3 hackers roaming the neighborhood at any given moment. Add the constant HAXLR8R classes and you’ve got a great … Read more
Rajendra over at Electronics Lab wrote an article on his temperature logger based on a Microchip’s 8-pin microcontroller, PIC12F683: A data logger is a device that records measurements over time. The measurements could be any physical variable like temperature, pressure, voltage, … Read more
Kerry Wong did a teardown of a Wavetek 907 signal generator: This Wavetek 907 is absolutely humongous. It has the same width as my HP 5350B but is much deeper (23 in.) and weights around 50 pounds. It was built in … Read more
Another update on µVolume USB volume control project by Rupert Hirst of RunAwayBrainz, we covered it previously: µVolume T-32 USB Volume Control update, featuring infra red media control Features: -Arduino Compatible (Atmel Atmega32u4) -Manual volume adjustment using the rotary encoder … Read more
TomKeddie writes: MaKeyMaKey was a very successful Kickstarter from some smart guys at MIT. It uses capacitive touch to stimulate USB HID devices using a Arduino Leonardo compatible programming environment. We ran a workshop at VHS in Vancouver Canada in … 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
App note: Design of a low cost, 45W flasher with short circuit protection using LM2902 (Quad Op-Amp) and CSD18534
App note (PDF) on automobile flashers from Texas Instruments This Application note presents the design of a low cost, flasher circuit with short circuit protection. The design incorporates the entire recommended design feature set for two wheeler flashers and includes … Read more
App note(PDF) on using Multi-layer ceramic chip(MLCC) capacitors from Altera. Multi-layer ceramic chip (MLCC) capacitors are used quite often in dc-dc converter input and output filters instead of tantalum or aluminum electrolytics. MLCC’s have low ESR, low ESL, and low … Read more
Atmel’s app note on using the AVR’s High-speed PWM (PDF!): This application note is an introduction to the use of the high-speed Pulse Width Modulator (PWM) available in some AVR microcontrollers. The assembly code example provided shows how to use the fast … Read more
An app note from Linear Technology: High voltage, low noise, DC/DC converters (PDF!) Photomultipliers (PMT), avalanche photodiodes (APD), ultrasonic transducers, capacitance microphones, radiation detectors and similar devices require high voltage, low current bias. Additionally, the high voltage must be pristinely free of noise; … Read more
ghent360 writes: For those of you who want to program a PSOC4 based device I have a firmware for FX2LP device + PC software to perform the operation. It has the same hardware interface as the device here: PD0-SWDIO;PD2-SWDCL;PB2-XRES. You … Read more
Logic Pirate is back in stock at Seeed Studio. It is an inexpensive, yet capable open source logic analyzer. It can sample 8 channels at 20 million samples per second, and may be overclocked for even faster acquisitions. It’s designed to … Read more