Timer Circuits
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This circuit diagram is a UM66 based touch sensitive musical bell. The circuit is built around CMOS IC CD4011 and popular melody generator IC UM66. The circuit contains a pair of touch plates. When these are bridged by hand for a moment, the um66 starts.... -
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 controlled flip flops. This sound controlled light can also be used as sound detection sensors. Flip.... -
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 hours. The frequency of oscillation can be controlled manually by simple modification. This is a.... -
In this article we will be discussing about a home security alarm circuit. This is a LPG gas leakage sensor circuit that detects the outflow of LPG gas and alerts the user via audio and visual indications. The heart of this simple engineering project is a.... -
Here we are going to discuss about a simple timer IC 555 project. The 555 timer IC can be used as an audio amplifierwithastable multivibrator configuration. It functions as to carry outpulse width modulation (PWM) of audio signal. Current(I) capacity of 555.... -
This article explains What is inverter And how can you construct your own simple low cost 12V to 220V inverter circuit. An inverter is nothing but a DC to AC converter. Inverters are very useful electronics products for compensating emergency power failure,.... -
We know that astable multivibrator is simply an oscillator circuit that produces continuous pulses without the help of any external triggering. The oscillation frequency and time period can be manually controlled through simple modification of resistors and.... -
How to change the brightness of aLED Whether led lights are dimmable Is it possible to adjust the brightness of LEDs LED is basically a diode, when the forward voltage exceeds 0. 7 volt, it starts to glow, and if the forward voltage is less than 0. 7 volt,.... -
Have you seen Audi, Lexus or Ford rain sensing wipers and wondered how they work in these vehicles They are handled by sensors at the center of the windscreen which detects rain water and turns on the wiper motor. Here is the working of rain sensitive wipers.... -
When ever you need to get an alarm or intimation after ten minutes, the circuit shown below can be used. The circuit is nothing but a monostable multivibrator based on IC NE 555. When ever you press the reset push button the green LED D1 glows after 10.... -
An astable multivibrator, often called a free-running multivibrator, is a rectan gular-wave generating cir cuit. Unlike the monostable multivibrator, this circuit does not require any ex ternal trigger to change the state of the output, hence the name.... -
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 an online store from where you can buy books on 555 timer IC, which have been reviewed in detail..... -
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 control voltage is +2/3VCC because of the internal voltage divider. However, an external voltage.... -
A digital stop watch or digital timer circuit schematic built around timer IC LM555 and 4-digit counter IC MM74C926 with multiplexed 7-segment LED display.... -
A simple F to V converter circuit with diagram and schematic using LM555 Timer IC.This circuit has lots of applications in digital frequency meters, tachometers etc.... -
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.... -
This timer circuit can be used to switch OFF a particular device after around 35 minutes. The circuit can be used to switch OFF devices like radio, TV, fan, pump etc after a preset time of 35 minutes. Such a circuit can surely save a lot of power. The.... -
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.... -
A timer circuit using IC 4060 is given here. The IC 4060 is a 14 stage binary counter with a built-in oscillator. R2, R7, C1 are the components that determine the frequency of the oscillator and the outputs will become high one after other and only one at a.... -
This is a simple Water level alarm circuits made using 555 Timer IC. Circuit will produce an alarm when the water level reaches a preset level.... -
A very simple water level controller circuit based on 555 IC and 6 transistors. A relay is used for switching the pump motor.... -
he following circuit shows a Photo Alarm Electronic Circuit. This circuit based on the 555 Timer IC. Features: LDR ( photoresistive cell), .... -
The following circuit shows about Practical Electronics/Plugins/Astable Circuit Diagram. This circuit based on the 555 Timer IC. Features: gives a pulse of about 2Hz with a very low mark-space ratio, used for any number of things, single 555 Astable, plugin.... -
555 Timer TV Remote Controlled Home Appliance Circuit Diagram. Features: 555 timer IC to avoid fast switching. you can only switch the circuit .... -
The following circuit shows about 12V PIR Sensor Timer Circuit Diagram. Features: 12 Volt DC, will turn on a floodlight or other device for a time .... -
This circuit shows about Ne7555 Timer For Light Sensitive Alarm Sensor Circuit Diagram. Features: detects a sudden shadow falling on the .... -
Once the mains power supply cuts off, the relay will only be able to turn ON after a period of 150 - 210 secs depending on the tolerance of the RC .... -
Function: made for battery charging time of three hours. Once the charging time is up the battery will be disconnected from the charger. Component: 4017 IC, .... -
It allow your car headlights to flash on and off at the same time or it will cause them to flash alternately. Component: 555IC, Transistor, Resistor, Relay, Polarised Capacitor... -
This is a DC to AC inverter using 555 timer and a transformer that is 9-0-9V/230V and rated at 36VA. Component: 555 IC, TIP42C and TIP41C .... -
used to maintain a deep cycle battery from a solar panel. This is a combination digital clock timer and solar panel charge controller. Component: .... -
In this circuit 4017 CMOS decade counter can be used to build a timer circuit. Push-button S1 will discharge capacitor C1 through resistor R2 ....
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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