Description

Pulse-width-modulation (PWM) controller.

Specifications

Max. voltage (NE555):	18 V
Max. current (IRF540):	20 A

Circuit diagram

Parts list

C1	Capacitor	1.5 nF
C2	Capacitor	10 nF
D1, D2	Rect. diode	1N4001
R1	Resistor	1 kOhm
RV1	Potentiometer	100 kOhm
Q1	MOSFET	IRF540N
U1	IC	NE555

Files

KiCad schematic
SPICE models

Sources & Inspiration

1. http://www.mdpub.com/sluice/index.html
2. https://howtomechatronics.com/how-it-works/electronics/how-to-make-pwm-dc-motor-speed-controller-using-555-timer-ic/