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NiMH NiCd battery charger

TRXCharger is a small however very efficient battery charger for nickel cadmium and nickel metal hydride Akkus. To be able to load it developed over with high rivers to the reflex load procedure individual Akku cells with good efficiency. The charging current can be given by means of in button operation in 15 steps (typically: [...]

Service Manual Notebook Sony Vaio iS200

Download: Notebook Sony Vaio IS200

Service Manual Strong SRT 4155 & 4355

Download: Service Manual SRT4155 & SRT4355

Solar Panel Controller

The purpose of this project is to realize a Solar panel controller. Initially developed for a sailing boat, the target to reach was to control the level of charge and discharge and to protect a 12 volts lead battery connected to a 32 watts solar panel.
The project is based on a 12F675 and uses HEXFETs [...]

Capacitor Calculator

Download : Capacitor Calculator

Service Manual Projector Sanyo PLC-SW20

Download: Sanyo PLC-SW20 multimedia projector

Simple LCD Backlight Fix

Fix any broken LCD backlight with an ordinary light bulb and a dead CRT monitor.
Broken LCD monitors basically come in three categories:
1) Cracked LCD panel, rendering the unit completely worthless
2) Backlight problem
3) Power supply problem
If it’s a backlight or power supply problem, it can be fixed.
Usually, the problem stems from the high voltage inverter circuitry, [...]

Repair Stuck Lens on Panasonic FZ5

Panasonic have been making some kick ass digicams recently, with ludicrously good features and optics for the prices. However, this comes somewhat at the expense of build quality.
A commonly reported problem with the FZ5 is the lens becoming stuck in one position. This is because the cogs that drive it are made of plastic and [...]

Easy Robot – Light Follower

No programming or microchips!
Robots, the most awesome thing there is, especially when allot of people can build it!
Source: dunnos

Service Manual Pioneer DJM-300 Mixer

Download: Pioneer DJM-300