The circuit given here is of a regulated dual power supply that provides +12V and -12V from the AC mains. A power supply like this is a ver...
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Free Switch Mode Pre-Regulator
The botheration was that a voltage regulator had to bead the 18 volt capital ability accumulation voltage to 8 volts at 500ma to ability ...
78XX Family Regulators Universal PCB for PSU
Many DIY projects require a small Power Supply. The 78XX family is ideally suited for this job, and with this little PCB you can easily bu...
RS-232 Reset for Microprocessor
Introduction This circuit allows a remote microprocessor to be reset by a controlling host by sending a break signal over an RS-232 or ...
Keyboard Given Bluetooth Hardware by I-O
At present many PDA come equipped of one, not always comfortable one, keyboard hardware. And like making for those devices that they are unp...
Voice Broadcaster
This voice transmitter is a short range transmitter which has a 15 meters range without an antenna,and this can be increased several times ...
Water Level Monitor
This single chip based CMOS circuit can detect water levels in a water tank,pool,channel etc,. and display on an easy to interpret is leve...
Austere Ni-Cad Cell Charger
This simple,low cost ni-cad cell charger can charger up to two AA or C sized cells at one time at the standard rate of 40 mA.The unique fe...
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Programmable Logic Controllers (PLCs)
Programmable Logic Controllers (PLCs), also referred to as programmable controllers, are in the computer family.They are used in commercial...