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14 May 2010

Jeri Ellsworth managed to build his own NMOS transistor at home using a kiln, Whink Rust and Stain remover, Emulsitone spin on dopant, ebay wafers and vinyl stickers. Entire proccess is demostrated step by step on the Youtube video above. Really awesome work! [via]

How-To Roll your own NMOS transistors – [Link]

14 May 2010

electricalwhat.com is a web database of electronic components symbols that helps you identify that missing symbol on a circuit. Symbols are categorized and presented on a clear way and there is also an option to locate desired symbol by appearance. [via]

Electricalwhat.com – find schematic symbols – [Link]

14 May 2010

user jmsaavedra shows us how to build Arduino-compatible circuit on a perfboard for just $8USD, includind ATMega mcu chip. That’s perfect if you would like to build your own Arduino for an “one time” application and don’t want to spend $30USD to buy a new board. On board you can also solder other components, like LEDs, analog circuitry etc. Check it out on the link below. [via]

Build an Arduino compatible circuit on a perfboard -[Link]

8 May 2010

Back in 1952 the idea for the first intergrated circuit is born from Texas Instruments engineer Jack Kilby. From then almost every elecronic device has an intergrated circuit and we can  say easily that IC has changed the world. Read the following article on wired about IC invention.

May 7, 1952: The Integrated Circuit invented – [Link]

5 May 2010

akikorhonen.org show as how to build your own parallel port logic analyzer using 74HC245 and a few other components. Connecting this circuit to PC’s parallel port and using The Fabulous Logic Analyzer software you have a full featured instrument to analyze digital circuits. Find schematic on the link below.

Parallel port logic analyzer – [Link]

4 May 2010

This project is a temperature recorder based on PIC 12F683, a serial EEPROM and a thermistor. User can set the recording interval from 1 to 256 seconds and EEPROM can store up to 32000 measurements. Thermistor linear range is between -10 °C and +40 °C. Schematic, PCB and code is available on the link below.

PIC 12F683 Temperature Recorder – [Link]

3 May 2010

This project is a RIAA Phono Preamplifier based on 6418 Tube and manufactured as a kit from Oatley Electronics. You can purchase this kit for $47AU. It is the ideal preamplifier for moving magnet (MM) cartridges.. check it out

6418 Tube (Valve) RIAA Phono Preamplifier Kit – [Link]

2 May 2010

Professor Ted Sargent and his team at University of  Toronto developed a new technology of image sensor that is based on a polymer material of quantum dots which can simply be printed out. The new technology is able to replace conventional CMOS image sensors in digital cameras and has 4 times more sensitivity and is less costly. [via]

Quantum dot image sensors to replace CMOS in digital cameras – [Link]

2 May 2010

Josh at imsolidstate.com build a 9 digit pulse counter based on  MC14453 3-digit BCD counter from ON semiconductor. A pulse counter is a circuit that counts the number of pulses arriving at the input of the circuit. Results are displayed on 7-segment displays. Many of these chips can be connected together to build a counter with as much digits as you like. Read circuit description on the link below. [via]

Build a 9-digit Pulse Counter  – [Link]





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