0 to 24 hour clock
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Tan Timer
This timer was designed for people wanting to get tanned but at the same time wishing to avoid an excessive exposure to sunlight. A Rotary Switch sets the timer according to six classified Photo-types (see table). A Photo resistor extends...
Timer circuit
After one cycle of operation, SCR1 will be activated, resulting in a low voltage being applied to the UJT emitter circuit, which interrupts the tuning function. When pushbutton SI is pressed, or a positive pulse is applied at point A,...
Automatic sprinkler controller circuit diagram 1
The automatic sprinkler controller circuit consists of a clock timing controller, a monostable flip-flop, a bistable flip-flop, an electronic switch, a self-excited multivibrator, a counter, a solenoid valve control circuit, and a power supply circuit. The power supply circuit includes...
Novel circuit diagram of the timer switch
A novel timing switch circuit features a "Variable Timing" adjustment function in addition to a standard timing circuit. It also includes a countdown display feature, which indicates the remaining time of the timing circuit, making it particularly useful. The entire...
A Bedside Lamp Timer Circuit Schematic
The purpose of this circuit is to power a lamp or other appliance for a specified duration (30 minutes in this case) and then automatically turn it off. This feature is particularly useful for reading in bed at night, as...
The switch shut off time delay circuit diagram
The switch shut-off time delay circuit consists of a timer, optocouplers, a bridge SCR, and an SCR AC switch. When the control button is released, it allows the motor or other AC power to remain active for one hour. Upon...
Timer Circuit
I am looking to build a timer for a pump. I want the pump to run for 5 minutes, then stop.
To create a timer circuit for a pump that operates for a duration of 5 minutes, a simple astable multivibrator...
Adjustable 1-10 Minute Timer Project
The circuit begins timing upon activation. A green LED illuminates to indicate that timing is in progress. Once the designated time period elapses, the green LED turns off, the red LED activates, and a bleeper emits sound. The duration is...
Time Switch
This circuit is specifically designed for individuals who frequently need to wake up early in the morning. Standard alarms in electronic watches are often insufficiently loud and frequently fail to wake users. The switch circuit described here will be useful;...