Recent content by Dan King

That is the kind of thing I need. Just trying to get it done by Monday with the parts we have laying around: Op-Amps, FET's, etc. New customers are coming this week so I need to get something working. Thanks for the reply.

I'm working on a circuit to manipulate an existing signal for an automotive hydraulic hybrid product. I need to pass on a 0.46 to 0.55V signal to the ECU during accelereration to keep the engine from revving and restore the original signal (0.55 to 5.5V) when the engine takes over. This...

Regarding the star ground thing: I currently have a 3.3V power supply (the good old LM317) in the center of the board with 220 ohm ferrite beads for coupling from the analog to digital. It works pretty well but I am getting a bit of noise from the analog outputs PWM and drawing about 1.6 Amps...

Thanks Don, I have used wire wrap before but have found the IDC thing more reliable. I might go for this though if what I want doesn't magically appear. Regarding the tool for the IDC: I have used needle noses to attach the wires in a pinch, but there was a tool specifically designed for...

Oh yeah, they cost about $45 back in the day.

If I remember right the wire gauge was 26. You could stack three wires easy, four was pushing it. I'm working in a very dynamic development lab and quick changes are necessary. I can do the soldering stuff but I would rather be able to do things quickly. We have ever-changing valves...

No picture but they look just like a normal proto board with a bunch of holes on a .1" grid. These just have all the holes stuffed with pins that double as sockets for parts and insulation displacement contacts for wiring. I would estimate prototyping with this method is at least 10 times...

"Speedwire" boards used to be made by an obsolete company called BICC-Vero. http://en.wikipedia.org/wiki/Speedwire These things are basically PCB's with holes on a 0.100" grid loaded with pins that are sockets on the top side for component mounting and insulation displacements forks on the...