Posted on Oct 1, 2012

If you need a wide-range, resistor-programmable monostable multivibrator, you can program tbe circuit for pulse widths from 1 JlS to 10s-107:1 range. A high-to-low transition at tbe input causes IC1`s output to switch low, thereby turning off Q1 and Q2. With tbe latter transistor turned off, IC3`s output increases and tbe output ofIC2 begins to ramp toward tbe negative supply level at a rate determined by the 0.01-JlF capacitor and tbe programming resistor.

Click here to download the full size of the above Circuit.

When IC2"s output voltagereaches -5 V, IC3"s output switches low. Ifyou anticipate input pulses shorter than tbe desired output pulses, Q3 is necessary. This transistor keeps IC1s input low while an output pulse is present, thereby preventing inadvertent resetting of tbe one shot.

Leave Comment

characters left:

New Circuits



Popular Circuits

Wiper speed controller
Protection For Telephone Line Circuit
LAN RJ45 Cable Connection Tester
telephone dtmf remote control
Audio Distortion Meter Circuit with Diagram
ISL62386 High-Efficiency Quad Output System Power Supply Controller for Notebook Computers
Connection Tester
Fluorescent lamp driver circuit composed of FET
ZN414 portable Receiver