Month: March 2016

Andy published his accurate and open source frequency counter that uses an Android phone as a display. It’s based on a high accuracy temperature compensated crystal oscillator (TCXO) fed into a phase locked loop (PLL) to create a high frequency reference clock. The reference clock...

This is a small hot-plate for SMT reflow soldering build upon an Arduino Pro and controlled using PWM and high side power MOSFETs. Black Mesa Labs has been using a $20 hot plate for a year now for soldering QFN ICs to PCBs. Only issue so far has been the size ( 10″x10″x3″ ) and...

VoCore is an open source hardware that runs OpenWRT Linux. This tiny computer comes with Wi-Fi, USB, 20+ GPIOs that will help you to embed it on your projects. With each passing day, mini computer boards are getting more and more popular. Single board computers like Raspberry Pi,...

Bob tipped us with his latest project, it's a 9V to 1kV DC-DC converter using CD4011 IC to produce a square wave and a IRF530 transistor to drive the transformer. Finally, I have made a new high voltage supply based on an inverter transformer and voltage doubler. It seems to be ok...

Dual DC Motor driver using two L293D IC. The L293D device is quadruple high-current half-H driver. The 293D is designed to provide bidirectional drive current up to 600mA a voltage from 5V to 36V. It provides 600mA +600mA on each channel suitable for mini hobby robots. The board been...

Here is a detailed guide on how to get started with ATMega328P microcontroller. The guide goes in details on how to setup it on a breadboard and how to upload your first code on it. and blink a led. The real benefit of using this microcontroller is that it’s only $4 US, whereas...

You can find some interesting projects on MeowCAD and one of these is a“8 Bit Heart”. MeowCAD is an online, in-browser electronics design tool that's completely free and open source. Use it to create schematics, printed circuit boards, share with your friends or just play...

Jelmer @ jelmertiete.com did a teardown on a cheap IP camera and also obtained the root password of it with the goal to investigate the security of such a devices. He writes: IP Cameras have become extremely cheap in the last couple of years. Mass production made the prices of...