New project: Signal tracer/injection pen

[gordo]

I'm good for one.

[jimilee]

Test signal currently is a square wave.
Unit would be prepopulated with SMD parts and you need to solder the switches and loudspeaker yourself.

I am aiming below USD 20 for the kit.

Are the parts included or where would you get the loudspeaker? Is the tip included too? I'm very intrigued.


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[Thomas_H]

The switches and loudspeaker are included and by the time the pens I ordered for sale arrive also the testing pins I ordered will be here and everything is in the kit.

Currently testing different speakers ;-)

I am also checking if I can get testclips like the one in the video of decent quality to include it as well but it might not work out.


Thomas

[jimilee]

The switches and loudspeaker are included and by the time the pens I ordered for sale arrive also the testing pins I ordered will be here and everything is in the kit.

Currently testing different speakers ;-)

I am also checking if I can get testclips like the one in the video of decent quality to include it as well but it might not work out.


Thomas

Sold! I like the splitter for the 9v, that's really helpful in on desk cord reduction. I'm in man, this sounds like a great project. My audio probe is sorely lacking.


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[Lubdar]

This is awesome!!!
  I rarely have to probe my pedals, but when I need to I always struggle and often just abandon the populated PCB.  This would be a great tool to help me resurrect alot of PCBs in my box-of-failures!!!

best regards

[EBK]

In theory, could I use this as a tiny, albeit not-great-sounding, guitar amp (ignoring the square wave injection bits)?  Just a weird thought, I suppose (thinking about basic listening tests to see if pedal controls are working, etc.)

[thesmokingman]

if I didn't already own a wire tracer I'd be in for one ... there's a ridiculous overlap in tools between my work and hobbies

[Thomas_H]

In theory, could I use this as a tiny, albeit not-great-sounding, guitar amp (ignoring the square wave injection bits)?  Just a weird thought, I suppose (thinking about basic listening tests to see if pedal controls are working, etc.)

Yes, you can. You will be able to hear any signal that is comming through the test pen - although not very HiFi like :-)

Thomas

[Muadzin]

Seeing your vid where you describe following the signal path on the schematic I can't help but think how helpful it would be if the signal path was also shown with a similar colored line or tiny arrows on a pcb.