Dew (condensed moisture) ad- versely affects the normal per- formance of sensitive electronic devices. A low-cost circuit described here can be used to switch off any gadget automatically in case of excessive humidity. At the heart of the circuit is an inexpensive (resistor type) dew sensor element.
Read more original source:
http://www.electronicsforu.com/efylinux/circuit/cir121.htm
This is AC Inverter. Input 12VDC from car battery to output 220V AC 50Hz or 60Hz at Square wave signal.
The main part is IC CD4047 and IC LM358 and Transistor 2SC1061 and 2N3055.
The transformer is 12V-012V Primary : 220V Secondary.
and current 3A up for power output than 100W.
Note:
C1 = 0.1uf metalized-film capacitor, 5% [...]
The electronic lantern control circuit (fig. 1) adds high-efficiency dimming and flashing to an existing
battery-powered lantern or flashlight or to a custom design. For the car it makes a great lamp for
changing a flat tire, back seat reading or emergency engine work. The flasher mode is useful for
warning other drivers of your troubles and it [...]
Best View 800x600 pixel
Email : 
Copyright 2008 www.elecfree.com/electronic/
Genwi
Entries (RSS)
