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555 Timer Oscillator – Circuit Schematic
555 Timer Oscillator
As discussed in previous blog posts, pin 5 terminal is voltage control terminal and its function is to control the threshold and trigger levels. Normally, the c...
555 Timer as Monostable Multivibrator – Circuit Schematic
555 Timer as Monostable Multivibrator
Are you familiar with the basics and applications of the 555 timer IC Are you looking for a book that provides all these basics If so, CircuitsToday has started...
555 Timer as an Astable Multivibrator – Circuit Schematic
555 Timer as an Astable Multivibrator
An astable multivibrator, often called a free-running multivibrator, is a rectan ­gular-wave generating cir ­cuit. Unlike the monostable multivibrator, this c...
555 Tester circuit – Circuit Schematic
555 Tester circuit
Here the NE555 is wired as an astable multivibrator. When the push button switch S1 is pressed the LEDs D1 & D2 will flash alternatively. That is when output is...
555 Timer Astable calculator for Astable Multivibrator Designing – Circuit Schematic
555 Timer Astable calculator for Astable Multivibrator Designing
We know that astable multivibrator is simply an oscillator circuit that produces continuous pulses without the help of any external triggering. The oscillation ...
Monostable 555 Multivibrator Working Principle and Circuit diagram with Animation – Circuit Schematic
Monostable 555 Multivibrator Working Principle and Circuit diagram with Animation
Monostable 555 timer multivibrator circuit (one shot monostable multivibrator) is a retriggerable mono shot pulse generator. The name Mono stable` indicates tha...
Astable Multivibrator using NE 555 timer IC – Circuit Schematic
Astable Multivibrator using NE 555 timer IC
Astable Multivibrator can be designed by using 555 timer IC, Op Amps and also using transistors. The 555 IC provide accurate time delay from mille seconds to ho...
Clap Switch Circuit using NE555 timer IC – Circuit Schematic
Clap Switch Circuit using NE555 timer IC
Here is one of the interesting 555 timer circuits to trick your friends while studying electronics in schools. Clap switch circuit is the local name of sound co...
Variable on-off times circuit using two 555 timers – Circuit Schematic
Variable on-off times circuit using two 555 timers
This timer uses two 555 ICs to Vary the desirable output. VR1 and VR2 are the potentiometers to change the speed of cycles....
Loop Control Automatic Reversing Circuit – Circuit Schematic
Loop Control Automatic Reversing Circuit
It is not the purpose of this folio to accommodate a abundant account of the IC`s acclimated by this circuit. If you appetite added advice on this accountable a...
Brakelight Flasher PCB – Circuit Schematic
Brakelight Flasher PCB
This is basically a flasher circuit modified to turn on and off a bulb instead of a LED. It uses a 555 timer IC working as an astable multivibrator. The flashin...
Rotation Sensor Circuit Using 555 PCB – Circuit Schematic
Rotation Sensor Circuit Using 555 PCB
Circuit The picture shows the circuit diagram of a rotation sensor that can turn on a device like motor or buzzer while the circuit assembly rotates. The circui...
Digital Clock Circuit-CMOS 4047 – Circuit Schematic
Digital Clock Circuit-CMOS 4047
This circuit provides a digital square wave that can be viewed directly or used to drive other circuits. It used the CMOS 4047 Low-Power Monostable/Astable Mult...
Automatic School Bell Circuit PCB – Circuit Schematic
Automatic School Bell Circuit PCB
Consider that a school has a total of eight periods with a lunch break after the fourth period. Each period is 45 minutes long, while the duration of the lunch ...
Telephone Ringer Using Timer ICs – Circuit Schematic
Telephone Ringer Using Timer ICs
Using modulated rectangular waves of different time periods, the circuit presented here produces ringing tones similar to those produced by a telephone. The cir...
Pulse Generator – Circuit Schematic
Pulse Generator
This circuit is very useful while checking/operating counters, stepping relays, etc. It avoids the procedure of setting a switch for the required number of puls...
Schematic Diagram Trigger Input Control Of 555 Timers – Circuit Schematic
Schematic Diagram Trigger Input Control Of 555 Timers
The following method allows the timer to be triggered by a normally closed switch. This would be useful in applications such as intrusion alarms where the prote...
PWM Modulator – Circuit Schematic
PWM Modulator
If you ever thought of experimenting with pulse-width modulation, this circuit should get you started nicely. We`ve kept simplicity in mind and used a dual 555 ...
Pulse Frequency Modulator – Circuit Schematic
Pulse Frequency Modulator
The pulse width of the compact pulse cum frequency modulator can be varied by altering the change-over point of comparator IC1 with a control voltage via resist...
servo tester using 4538 – Circuit Schematic
servo tester using 4538
There are times when a small servo tester for modeling comes in very useful. Everybody who regularly works with servos will know several instances when such a s...