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Delay On Circuit – Circuit Schematic
Delay On Circuit
Protect your LCD or Plasma TV with this tiny delay on circuit. The SMPS based power supply of these modern electronic devices is vulnerable to spikes in t....
Circuit Delay and Speakers Protektor Using TL071 – Circuit Schematic
Circuit Delay and Speakers Protektor Using TL071
Circuit-delay relay circuit speakers is useful as a delaying / delay on the speaker that functions as a deterrent to prevent pounding of the very first amplifie...
Automatic Head Lights Turn Off Circuit – Circuit Schematic
Automatic Head Lights Turn Off Circuit
A circuit that can turn off head lights/lamps of a car/vehicle automatically after a preset time.This light switching circuit is built using 555 timer IC....
Auto OFF Light – Circuit Schematic
Auto OFF Light
This is Auto OFF Light circuit. After the switch is pressed, the bulb is kept illuminated for a few seconds. To increase the ON time, The 10k should be....
A Bedside Lamp Timer Circuit Schematic – Circuit Schematic
A Bedside Lamp Timer Circuit Schematic
The purpose of this circuit is to power a lamp or other appliance for a given time (30 minutes in this case), and then to turn it off. It is useful when reading...
555 Low power Consumption Timer Circuit – Circuit Schematic
555 Low power Consumption Timer Circuit
Normally 555 timer circuit even though the start push-button PB1 is not pressed, the timer keeps consuming power From the battery due to a potential divider for...
28 LED Clock Timer – Circuit Schematic
28 LED Clock Timer
This is a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes. 12 LEDs can be arranged in a circle to represent the 12 hour...
1 Hour Timer – Circuit Schematic
1 Hour Timer
Speaker relay delay controlling circuit for audio amplidier...
Long Period SCR Timer – Circuit Schematic
Long Period SCR Timer
This is a SCR timer circuit. Here, SCR is used to drive the final actuator, the buzzer. The time constanst of this circuit is determined by R1 and C1. The buzze...
Time Delay Circuit CD802/832 Schematic Diagram – Circuit Schematic
Time Delay Circuit CD802/832 Schematic Diagram
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Four-Hour Timer – Circuit Schematic
Four-Hour Timer
The following schematic diagram is four hour timer circuit. Feature : easy to build, 3 hours 53 minutes total time, 9V supply voltage. Component : 555 timer IC,...
0 to 24 hour clock – Circuit Schematic
0 to 24 hour clock
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555 timer bassed Electronic lock circuit with explanation – Circuit Schematic
555 timer bassed Electronic lock circuit with explanation
A very simple electronic key code lock circuit that require few external components can be constructed using this schematic diagram. This electronic key code lo...
555 Timer based Cellphone Miss-Call Device – Circuit Schematic
555 Timer based Cellphone Miss-Call Device
This is an entry for the international 555 Contest. The 555 timer chip has been around for many many years and is extremely versatile. The Concept of my project...
555 traffic lights circuit project – Circuit Schematic
555 traffic lights circuit project
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Extended On Time Timer Circuit – Circuit Schematic
Extended On Time Timer Circuit
Half of a Motorola MG14538B dual, precision, retriggerable mono stable multivibrator is used to form an extended on-time timer circuit. That type of circuit ca...
Count Down Timer Circuit – Circuit Schematic
Count Down Timer Circuit
With switch SI in the off position, as shown, battery voltage is applied across timing-capacitor CI, which stays charged while the rest of the circuitry has no...
Timer 1 Minute To 400 Hrs Circuit – Circuit Schematic
Timer 1 Minute To 400 Hrs Circuit
This ultra wide range timer uses a 555 timer base, two 4017Bs and a 4020B that act as frequency dividers that can be switched in and out....
Tele Timer Circuit – Circuit Schematic
Tele Timer Circuit
The circuit is built around a 555 oscillator/ timer. The circuit provides two time periods. The long-running time period is adjustable from about 1 to 10 minut...
Reflex Timer Circuit – Circuit Schematic
Reflex Timer Circuit
This timer circuit uses a 555 IC timer and three 74LS193 counters to drive an LED display. SI is activated by one person, who turns on piezo buzzer BZ1 via Ql ...