Simple, small and cheap PWM regulator on NE555.
Single-sided pcb layout with only 1 jumper.
You can use it to drive 12V motor, LED strip, Peltier module, lightbulb etc. PCB dimensions: 34.29 x 20.63 mm. Pulse width regulated by standard potentiometer. You can use any Mosfet in DPAK (TO-252) case as You like and follow Your requirements. I am using 2SK3918 from old pc motherboard.
I also designed even smaller version with components on both sides, but is now without tests.
As soon as possible i make photos and movie to show prototype.
If You want to make it, just download the ne555_pwm_smd_top.pdf file, print it and make thermotransfer. All SMD resistors and capacitors are in 1206 cases. You can find partlist in bom.txt file.
Schematic:
PCB layout:
Partlist (from file bom.txt):
Part Value Device Package Description
C1 100n C-EUC1206 C1206 CAPACITOR, European symbol
C2 100n C-EUC1206 C1206 CAPACITOR, European symbol
C3 10n C-EUC1206 C1206 CAPACITOR, European symbol
D1 LL4148 DIODE-MINIMELF MINIMELF DIODE
D2 LL4148 DIODE-MINIMELF MINIMELF DIODE
D3 LL4148 DIODE-MINIMELF MINIMELF DIODE
IC1 NE555D NE555D SO08 TIMER
JP1 ZAS PINHD-1X2 1X02 PIN HEADER
JP2 OUT PINHD-1X2 1X02 PIN HEADER
Q1 MFET-N TO252_STM TO252_STM IGBT
R1 1K R-EU_R1206 R1206 RESISTOR, European symbol
R2 47R R-EU_R1206 R1206 RESISTOR, European symbol
R3 100K 3RP/1610N 3RP/1610N 16mm Potentiometer one level