Archive for April, 2008
50V 2A power supply circuit design - adjustable
LM10 makes this 50V power supply a quality one. With 2 LM10 we can build a short circuit protected power supply, with adjustable output voltage and current.
The output voltage increases linear with P1 and P3 adjust the current. P2 is used for adjusting the maximum output current (2A). This 50V power supply has a minimum [...]
12V dc - 220V ac converter
CMOS 4047 is the main component of this small converter wich transforms a 12V dc into 220V ac. 4047 is used as a astable mutivibrator, at pins 10 and 11 will have a symmetrical rectangular signal wich is amplified b 2 Darlington transistors and finally reach the secondary coil of mains transformer ( 2×10V / [...]
Liquid detector, water sensor
This is a very simple liquid detector that use a relay to open an evacuation van. You can use it for water or any liquid that conduct electricity. Use any PNP transistor that can stand the relay current.
