Today I can finally announce the launch of my new site: TableTopReports.com. If you like tabletop games like Bloodbowl, Warhammer, Warhammer 40k or any other tabletop wargame, have a look at TableTopReports.com.

GameIO is a slot-2 device for Nintendo DS and DS Lite that can add serveral interface to your DS to be used in your own homebrew application. Possible interfaces are: UART, MIDI, SPI, I2C, Onewire™, MMC/SD/SDIO, NAND Flash, JTAG, R/C Servo and GPIO.

Thomas Scarborough's electronics design have been popular. Here, therefore, is a “super simple” SONAR (designed by him). SONAR stands for SOund NAvigation Ranging. It is a technique which is used to determine the distance and direction of objects by acoustic means -- usually in water, but also in air. The SONAR described here has the most basic functionality -- it simply reports the existence of...
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Thomas Scarborough has designed a new embodiment of the CCO (Coil Coupled Operation) metal detector, a new genre which I invented in 2004. I believe that this is the first IC design to appear on the Internet (there is a transistor design on many websites, and IC designs were published by Elektor and EPE). It took me just eight minutes to design this -- which illustrates the simplicity of the...
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Super Simple Counter The freebie metal detector I previously designed for [url=http://thomasscarborough.blogspot.com/]this blog[/url] is by far my most popular post. So here is another circuit I designed today. Counters must be among the more sought-after electronic circuits. However, even the simplest of them are complex. This provides a "super simple" solution, to count from 0 to...
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HttpTestClient version 0.1.0 is released. This tool is the ultimate lightweight tool to test HTTP services. It allows you to create and send HTTP requests in an easy and simply way. It is great to to test your server side AJAX scripts.

MP3 ATMEGA8 VS1003

Lets have some practice and write simple AVR LCD menu routine. For this we need to write LCD control library. I decided not to use one from AVRLIB. LCD controlling isn't difficult just a few lines of code unless you want to make it more universal.

an adjustment termometer by LM35 this file simulated by Proteus 7.2 and micro program is on Bascom

One frequently finds gongs or chimes for sale in antique shops or Eastern markets. But supposing one would want to wire these to a pushbutton at the front door to create a ding-dong doorbell? How would this be done? Or consider, for a moment, more creative possibilities. How would one e.g. cause wine-glasses or African drums to resonate when a doorbell is pressed? The circuit shown in Fig....
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Today we released a new patch for the Fon firmware. We have included OpenVPN in the firmware so your Fonera can now act as an VPN server! Download and read more here.

Based on the classic Baxendall tone control circuit, this provides a maximum cut and boost of around 10dB at 10K and 50Hz. The first [url=http://www.chinaicmart.com/suppliers/174/BC109C.html]BC109C[/url] transistor (left hand side) is acting as a buffer. It provides the circuit with a high input impedance, around 250k has a voltage gain of slightly less than unity. As the Baxendall tone control...
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This timer makes a LED be on for a certain amount of time after pressing the switch. This time is adjustable from 3 seconds to 2 minutes using the potmeter. Instead of a LED other load can be connected to this circuit, a relay for instance. [url=http://www.circuitdb.com/download.php?fileID=217]TinyCAD file of this circuit[/url]

Building a serial port interface. Mount network shares. Build your own modifed firmware for La Fonera while keeping the original Fonera functionality.

CircuitDB is proud to announce that saurabhparashar is the winner of the CircuitDB Design Contest 2008! He sent in his Programmable path navigator Robot project. Congratulations saurabhparashar! You win 100 US dollar and eternal fame!