Even Its sux when using 230V power and transformers!
but this circuit is easy.because its work with car battery too.
and this has adjustable pulse controller too. ;)
Follow the diagram and have a fun! You can modify this for a big unit with 4 injector spray pattern and spray level tester! :D
Remember to change the R1 Resistor.I used 220Ohm (5W) resistor. Because 100ohm is getting hot soon.
Check out my testing video too!(its without any fuel or cleaning liquid line because I took this video on my computer table.LOl!)