Tagged Questions

3
votes
2answers
66 views

Getting rid of ripple from an LCD backlight

I have built a circuit which contains an integrated power supply stepping down mains voltage to 5v through a transformer, rectifier circuit and a voltage regulator. With a couple of smoothing caps the ...
1
vote
1answer
180 views

Design a simple circuit to generate -21V..-24V from +5V

I have got an old-STN-LCD which needs a very negative voltage, -21V..-24V are required in order to do the proper contrast, a current of less than 200nA is required, the LCD controller also requires a ...
3
votes
1answer
112 views

Can I use a PC power supply in a LCD?

The LCD's original power supply has the same conectors as a regular PC power supply. My main concern is if the PC power supply has the correct specs to be used by the LCD. The original power supply ...