What did Chuck Norris' flashing headlights look like? I don't remember them from the show. '
I am pretty sure U1 in Boncuk's schematic is a 555 timer. Its very common and easy to get. U2 looks like a 4017 Decade Counter. Also very common and easy to find.
The BUZ10's are power MOSFETs. The resistors and capacitors have values next to them.
The 555 is used in astable mode. If you google "555 astable" you will get lots of pages to learn about how this works and how to adjust the speed.
The 4017 just clicks along at the speed the 555 is going, setting one pin at a time high. Pretty much
Pulse 1 from the 555 sets Q0 high and lights lamp A
pulse 2 will make Q1 go high and Q0 go back low. Nothing is hooked to Q1 so lamp A goes out
pulse 3 makes Q2 high and lamp A goes back on
then we have 2 unused pins that give a delay and then we move over to lamp B and repeat.
Q8 is hooked to the reset pin on the 4017 so we can do it all over again. This just loops over and over and over.
Make sense? The diodes block the current from going back to the low pin on the 4017
The speed of 20Hz seems way to fast for a incadesent bulb to me. I don't think it will even flash at that speed, just look steady and a bit dim.
I am sure Boncuk will stop back in and clarify this in time. He's a regular around here.