This can be a thin strand of wire, like one of the copper "hairs" from a section of lamp cord, which is wired to the altimeter by terminals somewhere on the rocket body and anchored to the launch stand at some point. Rocket takes off, stand holds the wire....

The 8-pin 555 timer must be one of the most useful ICs ever made and it is used in many projects. With just a few external components it can be used to build many circuits, not all of them involve timing! A popular version is the NE555 and this is suitable....

This circuit provides a visual 9 second delay using a 7 segment digital readout LED. When the switch is closed, the CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output held high. When the switch is opened, the timer produces....

Im looking for a Light timer/ dimmer Like something you would find on a Dome light. but dont know where to start ..

This toggle circuit operates by using a couple 555 timers wired as inverters. Pins 2 and 6 are the threshold and trigger inputs to the first timer and pin 5 is the output. The output at pin 5 will always be the inverse of the input at pins 2 and 6. Likewise,....

The following circuit shows about Cat And Dog Repellent Timer Circuit Diagram. Features: high output ultrasonic transmitter, uses a standard 555 ....

The ckt 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 connected....

This circuit uses the 555 timer in an Astable operating mode which generates a continuous output via Pin 3 in the form of a square wave. This turns the LED (D1) on and off. The speed at which the LED (D1) is turned on and off is set by the values of R1 and R2...

The timer is triggered on the zero crossing voltage pulse. The time constant is determined by C5/R14+R15 that is used to determine the conduction angle. The T2 T3 inhibits the power switch until the auxiliary supply voltage reaches 8V to guarantee that the....

Anyone who has designed circuits using the 555 timer chip will, at some time have wished that it could be programmed for longer timing periods. Timing periods greater than a few minutes are difficult to achieve because component leakage currents in large....

This circuit utilising a 555 timer IC can be used as an alarm system to prevent the theft of your luggage, burglars breaking into your house etc. The alarms goes ON when a thin wire, usually as thin as a hair is broken. The circuit is straightforward. It....

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The input signal it is applied to a gate G and then to a counter, for a precisely period of time After this period of time, the input signal it is stopped for a while and then the cycle it is repeated. In the time of break the content of counter it is....

Circuit above shows a circuit diagram of the Clock Controller V1.1. P3.0-P3.3 also drives a base pin of 4-PNP transistor, 2n2907 with sink current ....

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....

Telephones are reaching its death point all over the world. however there is more than 350 million mobile phone users in india, but there are tremendous number of telephone users are there also. Well, this telephone timer is designed to help saving by....

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A robber will not stay anywhere with an ear-piercing sound as he cannot hear if someone is approaching. It`s the best deterrent you can get. The "F" contact on the piezo is "feedback" and is not needed in this circuit...

DC motor control circuit using NE555 Are you familiar with all the applications of 555 timer circuits If not, we can help you. We all know that for better understanding, the best source is an authenticated book on the subject. CircuitsToday presents an....

This article describes one reliable, simple, and universal method of interfacing MaxTrac, Radius, and GM300 series of Motorola mobile radios to common repeater controllers. Most of this information also applies to radio interfaces that are used with IRLP or....

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 flashing rate can be varied from very fast to a maximum of once in 1. 5 sec by varying the preset VR1. ..

The time interval of this circuit can be varied digitally through the DIP switches. The time code however must be set in BCD form. A 120 Hz signal generated by doubling the line frequency is used as the time reference. This is then divided to 1 pulse per....

This circuit uses a Cmos 4017. The 4017 is a decade counter. The count starts at zero. And it advances by one - each time pin 14 is taken high. When the count reaches nine - it goes back to zero - and starts all over again. = As the count progresses - each....

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This device is a simple timer, allowing to keep on the headlights of your vehicle for about 1min. and 30sec., e.g. when accessing some dark place, without the necessity of coming back to switch-off the lights....

Circuits using large value resistor/capacitor combinations are not very accurate because of the wide tolerance and leakage current of polarised capacitors. A better solution is to use an astable circuit together with a binary counter/divider chain which....

U20 is a 556 timer configured as a one shot multivibrator. The output pulse width is determined by the size of R34 and C24. Pulse width = 1. 1 x R34 x C24 =. 5 seconds. The output on pin 9 is "high" active. The output of U8 is "low" active. Reset initializes....

The job of this timer is to disconnect thecompressor circuit and connect a resistive heatingelement located near the evaporator atregular time intervals. The defrost heater is thermostaticallycontrolled and is used to melt any frostformation on the....

This device is a simple timer, allowing to keep on the headlights of your vehicle for about 1min. and 30sec. , e. g. when accessing some dark place, without the necessity of coming back to switch-off the lights. Pushing on P1 allows C1 charging to full 12V....

Description:The following circuit shows about Basic Monostable Multivibrator. This circuit based on the 555 Timer IC. Features:  Pin 4 is the RESET, t=R1xC1, ....

The latest addition to my collection of Infra Red (IR) Repeater circuits. The Mark 5 is a much improved version of the Mark 1 circuit and has increased range and sensitivity. It is also immune to the effects ofambient light, daylight and other forms of....

Most all work off of some flip-flop like principle. And while I could have suggested a true flip-flop chip, I thought it would be cooler if you could use a 555 timer chip (which contains a single flip-flop and a couple of comparators). After scouring my....