I just stumbled upon a pretty cool youtuber and a problem many of us have faced in the past – finding the perfect continuity tester.
In most cases I use my bench multimeter but a small dedicated device just for this tast would be awesome.
Here comes Leo’s Bag of Tricks!
First of all, his video:
He’s a pretty chill dude and explains his circuit in detail. Definitly worth a watch!
I wanted such a device for myself and plowed through my parts bin. I dug out a primitive tester. It sends 4.5V through the circuit for testing, lighting a little incandescent light bulb and a beeper.
First of all, this is the device:
The back compartment houses a replacement bulb and a place for the batteries:
You can pop the front and the back of this thing, thats rather nice:
A minute of gutting later…
Unfortunatly the beeper is glued in. I drilled it out but I think you can wiggle and break it if you like.
Eyeballing and meauring the space inside…
So I just took Leo’s design and placed it inside the TESTFIX 🙂
I’ve left the space for the beeper somewhat flexible so you can fit different beepers in there. The LED in the middle has a 10mm diameter.
The battery holder was changed from 3*1.5V to 2*1.5V. The spare bulb was kicked out 🙂
I put a piece of plastic in the place where the switch originally was – mainly to prevent stuff from getting in there.
The device in action 😉
PS: The beeper needs a few microseconds to start, that’s why it isn’t beeping in the last contacting of the probes.