Hi, I had to look through my posts to get the URL for the Jcar module.
Here it is.
Peak Hold Injector Adaptor "Kit Back Catalogue" - Jaycar Electronics
Thanks for the interest. The Jcar pulse & hold module solves that problem.
It is designed very well and easy to assemble. The instructions are superb!
Just ohm the resistors to make you get the right one in the right place.
It takes about 2 weeks from when you order it to arrive at your place.