Messages

Hi Jimmi,  welcome to the club!

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

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

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.

Thats really cool!

Added link to youtube demo video: https://youtu.be/C7YJBo8ySLI

Let me know what you think!

Thomas

The device does both. It injects the signal via clip and you tip the pen to the trace/solder joint to hear if it is there.

Hi guys,

after some long silence I have put up speed again and I am trying out a few new things.
I set up a project to try out PCBA (PCB and Assembly) service.

I wanted to create something usefull, so knowing that a lot of support requests sooner or later have the question: "Did you use a signal probe to veryfy your circuit?" I created this:

Link to demovideo on YouTube:  https://youtu.be/C7YJBo8ySLI



Signal tracer/injector pen features:

• handy tool - thus the pen design
• powered by 9V pedal source
• switchable signal generator burst or alternating (950Hz/1050Hz)
• switchable instrument (200mV) or line (2V) signal level
• amplifier and mini loudspaker in(on) the pen
• SMD components already soldered

Do you think this will be usefull for the community?

yours
Thomas

Compliments on completing this task!

I tried with an RN52 module a few years back and gave up.

best
Thomas

Hi, check the output cap of the 5 band eq. It may be leaking dc.
You may waht to add a pull-down resistor at the output of the eq.

Best
Thomas

Great stuff!

Great build! Impressive negative etch.

Impressive!

Well done!

Nice build! and nice board from Aion.