I’ve finished putting all the parts together and stuffing it into a nice little enclosure. It did present a few challenges however.
It seems I made and error on my PCB. One little trace was causing a problem. It fried a 555 chip. So, I fixed the trace then made a 32 mile round trip to Radio Shack to buy the last two 555s they had so I could finish up the board. I got home with my little chips and went back to work but in the process I fried another chip because I plugged it into a socket that had power applied to it. OOPS! Live and learn to TURN THE DAMN POWER OFF WHEN WORKING ON A CIRCUIT!!
So after all that I got everything soldered up including the switches and LEDs. It tested out OK so I drilled the holes for LEDs and switches in the cover then mounted those things up and installed the lid.
I put a Molex style connector on the output wires which allows different fuel injector connectors to be plugged into it. You can also just tap into the wires and use them that way.
Tomorrow I’ll connect it up to my Honda along with a fuel pressure gauge and run a real “on car” test while shooting a video. Once the video is done I’ll upload it and the whole project with pictures and videos will be my entry in the 555 contest.
Feels good to have it finished. I like this part of a project. It started out as a thought, then went to a write up in my journal, then a schematic, then a breadboarded circuit followed by a prototype build. After a little feedback from some other folks it got a few revisions then a final build and now it’s done and it works!
Making things yourself brings about a great feeling of accomplishment and satisfaction. I love it.
OK what’s next?