a low cost PWM dimmer using NE555 and MOSFET with DIY aluminium case.
Step 1: aluminum case from Aluminum Square Tube.
aluminum case has dual role.
first one is protection cover.
and second is heat sink for MOSFET.
Step 2: Drilling holes
POT fixing on aluminum case.
Step 4: circuit board soldering.
Step 6: testing with 12V/35W lamp