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Build A Cheap DIY Signal Tracer / Injector Pen Useful For Electronics Fault Finding

A Signal Tracer is a really useful bit of kit for any electronics repair bench. So in this video I decided to build a cheap Audio Signal Injector / Tracer Pen using some common circuits I found on the internet… That should be nice easy and cheap to do yeah? I mean, really, how hard can this be???

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Music making a cameo appearance in this video: David And The Giants – Ten Miles High

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Richard

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