Flashing Ditch Lights

Revised 1-17-07


The modification below allows for the use of bright incandescent bulbs rather than LEDs.  It can drive extremely bright 20 watt / 12 volt bulbs.

The circuit is the same as the original except for the section in the lower left.  This modification uses to Mosfets (IRF530) to drive 12 volt incandescent bulbs.  The 2N2222 acts as an inverter so that one bulb brightens as the other dims.

When driving two very bright bulbs the Mosfets remain cool to the touch without the use of heat sinks.