Astable Multivibrator


Posted on Feb 6, 2014

The resistor in series with the LED in Collector circuit of transistor T1 must be 470 ohm, not 470k. To connect the bulb 24V-3W, you should know that resistance of this bulb when lighting is 24x24/3 = 190 ohm, when it is not lit, the resistance is about 10 times smaller, e. g. about 19 ohm, so the collector current of the transistor may go up to 24V/19ohm = 1. 3A - need to pay attentions when choosing transistors.


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

The lamps will be connected in collector circuits of transistors, replacing the resistors. However, it is not simple replace the resistors wiht the lamps, you have to change values of other components, as well as adjust for frequency and duty cycle of the wave.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Proximity detector
Logic probe yields three discrete states
Remote Control Tester
Light dimmer circuit using DIAC and TRIAC
Digital Clock
Make Your Own USB Device using PIC18F4550
arduino clock
5 volts high current power supply using 7805 voltage regulator
10 to 15 MHz AM Transmitter Circuit
Handy Pen Torch Circuit
Evergreen Exciter for the Special Night
Bus Description RS423 Serial Interface
3-channel Audio Amplifier circuit
Voltage Controlled Duty Cycle Sawtooth Circuit
A-3-7-type air compressor control circuit
Simple fourth gear dimmer switch circuit



Top