This is what I wanted to build.Because when we are testing petrol injector we always had to use AC transformer and 230V power source.
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!)