The Witness Camera is an automated, self-recording surveillance camera, that uses a gigabyte-class flash card as recording media. I designed the Witnesscam because available surveillance solutions were too expensive or impractical for home use. I built the system from a VGA CMOS colour camera, a passive-infrared (PIR) movement sensor, an ATmega32 processor, and a 1GB [...]

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Download: eprom FUEGO CTV FE-21VE7

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PA100 GC – 100W per channel, 2x LM3886 in parallel power amplifier This amplifier is based on the PA100 parallel amplifier detailed in National Semiconductor’s application note – AN1192. Since my DIY speaker is 4-ohm and somewhat difficult to drive, I want to have a more powerful amplifier to match with it. Therefore I designed [...]

The big idea is that he used a host computer to run a Processing application, which periodically checks Twitter for updates, and then sends “scrolling” data, one column at time, to the external LED display. Source: David Nichols

CodeLock AVR electronic combination lock is realised with Atmel AVR microcontroller AT90S2313 or ATtiny2313. Program in hex code is 2 kB long. User code is consisted of 1 to 8 digits. If you buy the chip than you can enter up to 8 user codes. If the code is entered in the correct sequence, then [...]

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After I built several LM3875 and LM3886 gainclone amplifiers, I was totally impressed by their audiophile sound quality. Then I saw the Jeff Rowland Power Amplifiers that use LM3886, I decided to create my own version – the BPA300. My design goal is to create a audio power amplifier that can deliver 300W into my [...]

Samsung LCD Monitor 172N, 192N – chassis NB17A Download: Service Manual Samsung 172N , 192N

Download: Service Manual Beko LM Chassis