Dimmer With Touch Switch Without Arduino or any Microcontroller

This circuit is a Dimmer With Touch Switch Without Arduino or any Microcontroller.

I just using two ICs (LM324 and CA3130).  The output is PWM signal and its duty cycle can be adjusted by two touch pads from 0% to 100%.

Interesting thing in this circuit that the duty cycle remain the same even after turns OFF and ON the supply voltage.

I explained it in my YouTube channel here:  https://youtu.be/MMfsP2cXfSs 

To order this PCB first go to the website link below, Then click "Add to card" then select the PCB color and quantity then click "Submit" and after few minutes when review completed by the engineers, you can pay for it by clicking on "Proceed to Checkout"
https://www.pcbway.com/project/shareproject/Dimmer_With_Touch_Switch_Without_Arduino_or_any_Microcontroller.html

Parts list:

CA3130 or CA3140

LM324

Mosfet IRFZ44n

Mosfet Heatsink

Capacitor 100nF

Capacitor 220uF

Capacitor 1uF MKH

Capacitor 47pF

Capacitor 47nF

Zener Diode 5.1V

Resistor 100K (2pcs)

Resistor 20K (2pcs)

Resistor 1.5M (2pcs)

Resistor 3K

Resistor  6.8K

Resistor 510R

Resistor 51K

Circuit:

 Video:

categories : circuits,Dimmers,Op-Amp Circuits,PCBWay,PWM,Touch switch