Control Relay Circuit with 9 Second

See figure below its Control Relay Circuit Schematics.

Amplifier Output Delay with Relay

This is a minimal circuit which I built to individual of my audio amplifier projects to control the presenter output relay. The end of this ...

DIY Solid State Relay

Individual benefit of solid-state relay (SSR) above normal electro-magnetic relay (EMR) is its tear and wear emancipated surgical treatment....

8 Relay Control Circuit

8 Relay Control Circuit R1-8=4.7 Kohms T1-8= BD139 (R1-8=15 Kohms if T1-8=BD679) RL1-8=6V-24V dc Relay D1-8=1N4148