Mains operated Log-Interval Timer circuit
#timer
#log-interval
#mains-operated
#delay
#pulse generation
#synchronization
#timing circuit
#electronics
#control circuit
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Long Delay Timer Circuit
This timer is designed primarily to turn off a portable radio after a set duration. This feature allows users to relax on the beach or in a hammock, confident that the device will automatically power down after a specified period,...
Photo Timer Circuit
The time is set by potentiometer R2, which provides a range from 1 second to 100 seconds, using a timing capacitor C1 of 100 µF. The output at pin 3 is normally low, keeping the relay in the off state.
The...
Reaction Timer
This circuit utilizes a timer to produce pulses at a 5-ms clock rate. The pulses are sequentially shifted into a shift register, illuminating an LED. An auxiliary timer generates one pulse per second to activate the "go" LED and initiate...
Boba Fett project movement
The timer generates a basic period (for instance, 20 ms), and with certain associated variables, it is possible to activate an I/O pin to produce a signal. By utilizing an 8-bit variable, the generated frequency can be divided into "chunks"...
Long-term electronic timer
The timer consists of an oscillator and a counter integrated into a single circuit. The timing interval is calculated by multiplying the oscillator period by the number of cycles to be counted. The frequency of the oscillator is influenced by...
A Tan Timer Circuit
This timer is designed for individuals seeking to achieve a tan while minimizing excessive exposure to sunlight. A rotary switch allows the user to set the timer based on six classified photo-types. A photoresistor adjusts the preset time value in...
5 to 30 Minute Timer
A switched timer for intervals of 5 to 30 minutes incremented in 5 minute steps. Simple to build, simple to make, nothing too complicated here. However, you must use the CMOS type 555 timer designated the 7555; a normal 555...
Timer circuit with 106 fixed preset time
The foot 13 between valve value 1 and valve value 2 will draw the transistor base current. If the relay releases, after a recovery time of 0.5 seconds, pressing the key will initiate the switching process again. The timer is...
Mains variable Delay circuit
The circuit shown will switch on and off a resistive or inductive load up to 800VA with the possibility to adjust both the on and off period. Switching takes place during the zero crossing of the sine wave. The switch...