Tag Archives: Timer Circuit

Long duration timer circuit.

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Description. 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… Read more »

Digital Stop Watch

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Make a Digital Stop Watch Description A digital stop watch built around timer IC LM555 and 4-digit counter IC MM74C926 with multiplexed 7-segment LED display. MM74C926 consists of a 4-digit counter, an internal output latch, npn output sourcing drivers for common cathode, 7-segment display and an internal multiplexing circuitry with… Read more »

LM555 Timer Internal Circuit Block Diagram and Schematic

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The LM555 is a highly stable controller capable of producing accurate timing pulses. With a monostable operation, the time delay is controlled by one external resistor and one capacitor. This device features: Adjustable Duty Cycle, Turn off Time Less Than 2μSec, Temperature Stability of 0.005%/°C, High Current Drive Capability (200mA)… Read more »

Electronic Timer Circuit

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Transistored electronic timer circuit Electronic timer based timer IC 555 Electronic timer based timer IC 555 and 4020 Timer kits are an ever popular item with the hobbyist. Two of the main methods used are a 555 IC and the discharging of an electrolytic capacitor. In this Kit we have… Read more »