fechter wrote:I hope to get a run of boards done at some point. I need to revise and check the most recent version very carefully before submitting a run, as mistakes are too costly. Once the layout is 'validated' with a successful test, a larger batch could be done. Right now, time availability is more of a limiting factor than money.
I found this little blurb today about using an inkjet printer to lay masks directly to copperclad board so you can etch your own prototype PCBshttp://www.instructables.com/id/Convert ... /?ALLSTEPS
the v4.5 BMS has a hell load of through-hole drillings that one would have to knock-out, but I still think a DIY PCB beats the cost and wait of a PCB service.
And you could make the pads extra wide on the prototype in case you need to add/cut/reroute things, so it can be like a breadboard.
some drilling and etching tips are herehttp://www.mentby.com/Group/piclist/ee- ... board.html
I'm thinking the cost of retrofitting a salvaged printer is about the same or less than ordering a prototype batch of _anything_, and it gives the ability to make lots of validation boards. I have a bunch of little projects I want to make where high-power/frequency rules out breadboards and wirewrap so I'm going to try and build a printer.
I've seen the layout thats been posted of the v4.5 BMS but not the parts list. smaller shunts and resistor arrays are the major changes, right?