Recent posts

Sensor modules project

Elpis shared his sensor modules in the project log forum: On the PCB you will find a clear indication for the voltage range, the sensor name for quick searching, the read and write I2C addresses together with the pin out labeling. On top of those,...
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Bus Pirate v3.8 free PCB build

B-tronics built a free Bus Pirate v3.8 PCB.  The Bus Pirate is an open source hacker multi-tool that talks to electronic stuff. If you build a free PCB we’ll send you another one! Blog about it, post a picture on Flicker, whatever – we’ll...
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Steam turret tank R/C controller

An instructable for a PIC based R/C servo controller by Steamhobby: The controllers capture the R/C receiver output, optionally manipulate the samples, then regenerate new servo control signals. As such, they greatly enhance what is possible...
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App note: ESD and EMC sensitivity of IC

A good beginner app note (PDF) from NXP on protecting ICs from ESD. Integrated circuits are sensitive to electrostatic discharge (a sudden and short-time flow of currents) and electromagnetic fields (at which they can be source or victim of both...
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App note: Power losses and junction temperatures on parallel Schottkys as secondary rectifiers in flyback adapter

Parallel Schottkys performance over single Shottkys app note (PDF) from NXP This document gives an overview of power losses and the consequential junction temperature rise of two parallel Schottkys as secondary side rectifiers in flyback power...
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Project: extracting and geographically plotting DTRS site information

Lui Gough has been researching the Australian railroad system’s new digital radio system and has posted detailed observations: As a radio enthusiast, and highly observant public transport user, I’ve made many notes about the deployment of...
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DIY bluetooth door lock

An open source bluetooth door lock,  check out  the step by step tutorial here at Make: To open the lock, we will use the app LightBlue. It has a section called the Sandbox, that lets you control the LightBlue Bean without having to program...
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Logic Sniffer back in stock at Seeed

The Logic Sniffer is back in stock at Seeed Studio. The Open Bench Logic Sniffer is an open source logic analyzer. It’s designed to support the SUMP logic analyzer software at the lowest possible cost. Get a Logic Sniffer for $50, with free...
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Bitx20 V3 “Dead bug style” new bandpass filter

A Bitx20 band pass filter from Pa1ed: the bandwith of my bandpass filter in the Bitx 20 was very small.Only 100KHz or so.I found this filter on the internet,and after I,ve build the filter I found out that this was the filter used in the Bitx20A...
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ESP8266 WiFi chip module

Richard Sloan writes in to highlight his site featuring info on the ESP8266 WiFi module. There is a new IC on the market that is creating a lot of stir, ESP8266 very low cost WIFI chip, available are boards now from China for $5 or less, we are...
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