Circuit Project Electronic

You’ve seen them when you’re driving. Mailmen use them, snow plows have them. This is a schematic of the circuit inside.This was taken from a popular unit available at NAPA auto parts stores. It’s amazing how simple it is for a PWM circuit.
It uses a UC3842 (here a TL3842 clone) pulse width modulator to regulate the charge on the main storage capacitor. In this respect is similar to a computer power supply. It has an interesting Zener booster circuit using an NPN transistor, shown on the left of the drawing. This keeps the supply voltage at or below 15V at all times. One great feature that this affords is a great variety of input voltages. It’s rated at 12-80V.

Related Links
More circuit about Pulse Width Modulated
More circuit Electronic Control
More circuit about Lighting
PWM Control Speed Motor 12V By TL494
PWM Motor Speed Controller - DC Light Dimmer by IC LM324
12VDC Fluorescent Lamp Inverter with Mosfet
A simple inverter for florescent lamps by D882
Fluorescent Lamp 8W driver by C1983

Read More Source:
http://silenceisdefeat.org/~lgtngstk/Sites/index.html
Thank you.

This entry was posted on Monday, April 7th, 2008 at 7:26 am and is filed under Electronic Control, Lighting. You can follow any responses to this entry through the RSS 2.0 feed.