Last Updated on June 26, 2024 by technoreview85
This is a complete step-by-step guide to making an electric timer plug. This timer Ac socket can turn on or off any Ac electrical appliance. We can set the time using a potentiometer. This is a simple circuit without an Arduino or any other microcontroller so no need to program or code.
It is useful for pumps, motors & other household or industrial Ac electrical appliances. Here I have used a 6 amp relay if you want to use a heavy pump, electric geyser, etc. Then you have to use a 16 amp relay. Other components will be the same as described in this article.
![timer plug](https://technoreview85.com/wp-content/uploads/2024/05/timer-plug.jpg)
This is an electrical outlet timer using the popular timer IC 555
How does timer plug work & uses for
This timer plug can be used for several purposes like –
- Outlet timer
- Timer plug for Christmas lights
- Timer plugs for lights
- Timer for water pump
- Timer for a geyser
- As an Industrial timer
It is an adjustable timer. You can adjust the time duration between 1 second to 10 minutes.
You need to make this plug with a timer
![Ic 555 pinout](https://technoreview85.com/wp-content/uploads/2024/05/Ic-555-pinout.jpg)
- 12-volt Relay
- 470 K potentiometer
- Tactile switch
- IC 555 & 8-pin IC Base
- Diode IN4007
- Resistor 1K – 3 pcs
- Resistor 10K
- Transistor BC 548 B
- Dotted perfboard size 5X7 cm
- 3 pin terminal block
- 12 Volt Ac to Dc power supply
- Some wire
- An Ac socket
![perf board](https://technoreview85.com/wp-content/uploads/2024/05/perf-board.jpg)
Project video
Circuit diagram
![adjustable timer](https://technoreview85.com/wp-content/uploads/2024/05/timer-power-outlet-circuit--1024x576.jpg)
Connect all components according to the circuit diagram.
Connection with Ac the socket & main line
![timer power socket connection](https://technoreview85.com/wp-content/uploads/2024/05/timer-power-socket-connection--1024x576.jpg)
Ac electric warning
We are using Ac main line. If you don’t know about AC electrical wiring please take help of a professional person. Don’t touch the relay & other components when AC is connected.
I have used 12v DC to run the electronic circuit. The Ac is connected to the relay. I have used a 3-pin terminal block for easy connection.
You can adjust the delay time using this potentiometer.
![timer using 555](https://technoreview85.com/wp-content/uploads/2024/05/timer-using-555.jpg)
You can adjust the perfect time which you need. You have to set the potentiometer value by monitoring with a multimeter.
For example:-
Keep value to 47K ohm for 1 minute.
23.5k for 30 sec etc.
You can use a normal fixed resistor if you need a fixed time.
![time adjusting for Ac](https://technoreview85.com/wp-content/uploads/2024/05/time-adjusting-for-Ac--1024x621.jpg)
Now you have to connect AC socket to the terminal block & connect to the Ac main line.
You can use it as an on-timer by changing the connection on the relay.
You have to press the micro tactile switch which is connected to the IC pin 2 to start the timer.
Instead of the micro switch, I can use some sensor module to trigger this circuit.
Make the circuit on a breadboard before making it on a perfboard.
For a better understanding, you can watch the project video. If you have any questions feel free to contact me in the comments. For a quick response, you can also comment on my YouTube video.