Relay Timer Switch Ic

The output load is driven by the relay switch which is in turn controlled by t.

Relay timer switch ic.

Time delay relay operation. In the circuit diagram the ic works as a monostable multivibrator. It is set by operating the key dr1. Due to this a negative switch on trigger is created at pin 2 of the ic which initiates the timing cycle and the relay ry1 switches on.

The relay contacts which are connected in parallel with s1 enables the ic 555 to remain powered even after s2 is released. Learn how to make a precisely adjustable timer with a variable delay from 1 100 seconds that uses the 555 ic. The circuit is built around a standard ic 555 astable configuration which basically produces an alternating high and low or an alternating 12v and zero volt at its pin 3 when switched on. When the set time period elapses the relay is deactivated and its contacts revert to the n c position disconnecting power from the entire circuit.

The specifications of this timer are. With dr2 you can reset the assembly any time you desire. This time delay relay circuit is built with ic ne se555 produced by intersil which contains a precision timer. Manual programming done with a dip switch.

This alternately switching output accompanies certain delay between its on off switching as determined by the component values of r1 r2 and c. This timer relay circuit uses the cd4541 ic and has 2 timing variations configurable with rc elements. Stability to temperature variations is 0 005 o c. Led signals exiting the timing state.

At the onset c2 can be expected to be fully discharged. The output has a 6a 250v relay with nc no contacts.