How to make a timer device for any electrical appliances ||pcb prototype

JLCPCB Prototype for $2(Any Color): https://jlcpcb.com

Hello everyone,In this video I will show you how you can make a simple timer circuit...by using this circuit you can control any electrical appliances for a particular time....

Components list....

1.IC 555
2.bc 547 transistor
3.8 pin ic base
4.103 pf
5.12v spdt relay
6.12v power supply
7.1k resistor*3
8.15k resistor
9.1n4007 diode
10.led
11.power cable
12.1 megaohms potentiometer
13.33uf capacitor,25v or 16v
Circuit Diagram....
https://drive.google.com/file/d/1Ux-_oeBptZCb-r0qmfhtDXNH4yfL6R4g/view?usp=sharing

Gerber file...
https://drive.google.com/file/d/1U0z5TdqXhhFlvfgz5JweIPFRe6kwi13j/view?usp=sharing

Timer app-https://play.google.com/store/apps/details?id=com.peterhohsy.timer555calculator

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