Recent posts

Digitally controlled bench PSU

Bertho posted a digitally controlled PSU design in the forum. He writes: The design is for 0…30V and 0…3A (90W) controllable at ~1mV and ~0.1mA steps. The actual accuracy is still out for testing and I assume that noise and...
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Tripping to South China Market in a bread van

The entire Pearl River Delta area of China is a manufacturing powerhouse. Huaqiangbei, the famous giant electronics market, is just a tiny facet of a huge industrial ecosystem. About 30 minutes north of Shenzhen there’s a giant market the size...
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Wearable pupillometer could detect dangerous diabetic condition earlier

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,...
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Arduino GSM home automation system

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....
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DIY vacuum tube amplifier

Ethan of Protofusion designed and built a stereo vacuum tube amplifier based off of the TubeLab SimpleSE design.  

A new successful board with Dirty PCBs

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.    

+/-12V dual power supply

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...
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SG90 servo controller

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.

#FreePCB via Twitter to 2 random RTs

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 every...
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Curious C-beeper

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...
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