..

A pair of multi-range timers offering periods of up to 24 hours and beyond. Both are essentially the same. The main difference is, that when the time runs out, Version 1 energizes the relay and Version 2 de-energizes it. The first uses less power while the....

The 555 timer. A chip so versatile that it has been used in everything from toys to spacecraft. A chip that can act as an oscillator, a schmitt trigge....

This timer will provide a sequence of up to ten separate events. The length of each event is set independently. And the sequence will run a fixed number of times - or repeat continuosly. The individual events within the sequence - can be made to repeat....

This circuit Simple DC to DC Converter For Digital Circuit. It use Volt supply 5V Only, To Output Step up Volt 10V-12V DC max. I use IC 555 ( hot ic Timer) for....

This circuit is a compact timer circuit that will keep the headlights of your car ON for about 1. 5 minutes and then turns it OFF. This circuit incorporated to your car will help you to access dark places with out the need to come back and turn OFF the head....

In this circuit a LM339 quad voltage comparator is used to generate a time delay and control a high current output at low voltage. Approximatey 5 amps of current can be obtained using a couple fresh alkaline D batteries. Three of the comparators are wired in....

The output of the 4017 is 100% duty cycle. so that means if you have step one and step two on, they will lead right into each other and you`ll have a step that is 2 cycles long. The output of the 555 timer is a 50% duty cycle. The AND gate combines the outs....

This AC Power Monitor continuously watches the AC power line voltage for both under-voltage and missing cycles. When it detects a total of 5 or 6 consecutive missing half-cycles (50mS, 50/60HZ), it drops a relay and starts a timer. A power contactor is....

This 555 timer is designed unusually to give a positive output through a control over its reset pin. Usually the timer IC 555 is triggered by applying a ne....

By taking the Trigger input (pin 2) "LOW", switch in Set position, changes the output state into the "HIGH" state and by taking the Reset input (pin 4) "LOW", switch in Reset position, changes the output into the "LOW" state. This 555 timer circuit will....

Simple PWM lamp dimmer using NE555 timer IC. 555 timer IC wired as variable duty cycle astable multivibrator for controlling the brightness of the lamp....

The circuit uses the very popular Sharp IR module (Vishay module can also be used). The pin nos. shown in the circuit are for the Sharp & VIshay modules. For other modules please refer to their respective datasheets. The receiver consists of a 555 timer IC....

A lot of electronic circuits using NE555 timer IC are already published here and this is just another one. Here is the circuit diagram of a police siren based on NE55 timer IC. The circuit uses two NE555 timers ICs and each of them are wired as astable....

How many have had legitimate problems with the 555 timer? Let me guessit involved the reset line, did it not? We all know that pin 4 must be set high befo....

This electronic timer switch will ON your light for 100 seconds, OFF for another 100 seconds and ON again for 100 seconds after an hour of powering up the circuit. Good home project to build ..

This is a design circuit for scoring game circuit that can be used for all occasions when a dice is needed. The circuit is based on a NE555 timer, a 74LS192 counter, a74LS247 decoder and a & segment LED display. The timer IC1 will produce the clock for the....

This is a two-zone alarm - with automatic exit, entry and siren cut-off timers. It can be triggered by the usual types of normally-closed input devices - such as magnetic reed contacts - foil tape - PIRs etc. I`ve used a 12-volt supply in the diagram - but....

In counter mode it provides 1Hz resolution up to 100Mhz. In timer mode maximum resolution is 0. 0000001 Hz up to 1Hz. Resolution is reduced by one digit for each additional decade. Multiple frequency updates per second by employing a sliding window for....

This simple LED driver circuit allows us to drive up to seven LEDs by using a single NiMH (Nickel Metal Hydride) AA cell. The circuit produces voltage puls....

CD4060 Timer Circuit 1 minute to 2 hours This is a 1 minute to two-hour timer switch. The 14-stage binary ripple counter Type 4060, IC1, has an....

A nice design which even turns off if the pushbutton is held depressed or jammed a long time. Not re-triggerable while the light is still on though(Thanks for pointing that out Watson): Below is one that starts off bright and slowly dims out to nothing. They....

The following circuit shows about NE555 Timer For Electronic Scooring Game Circuit Diagram. Features:The circuit comprises a timer IC, with a ....

Police Siren circuit diagram. This circuit produces a sound similar to the police siren. It makes use of two 555 timer ICs used as...

The main part of this circuit Doorbell two timer NE555 ICs. When someone hit the switch S1 momentarily, the speaker emits a sound of the bell, if the time period of the monostable multivibrator built around IC1. When the switch S1 pressed, IC1 is enabled in....

Maybe you ever use LM555 as timer project before, yes it also nice if you want to make analog timer using LM555. According datasheet LM555 this IC can use for several purpose in electronic project like to adjust timer according time needed. From figure 1....

The circuit is built around two 555 timer ICs. U1 and U2. U1 is wired as a variable duty cycle oscillator with a constant time period of around 0. 1 second. Duty cycle can be varied from 0 to 100 per cent by R4 potentiometer. The output of U1 (pin 3) is....

..

..

This is a programmable alarm timer ambit that uses alone LEDs to announce hours and minutes. 12 LEDs can be abiding in a amphitheater to represent the 12 hours of a alarm face and an added 12 LEDs can be abiding in an alien amphitheater to announce 5 minute....

The IR detector (IC3) controls an LM 7555 CMOS timer (IC2) which operates in mono stable mode. When the beam is broken, IC2 is triggered and its pin 3 output goes high for about half a second. This extinguishes LED1 and turns on transistor Q1 to drive a 5V....

This is one of the most basic 555 circuits. This circuit is part of this chips datasheet, complete with the math needed to design to specification, and is one of the reasons a 555 is referred to as a timer. The green LED shown on the illustration lights when....