Introduction: (13) Push Button Syringe Microphone Switch

Picture of (13) Push Button Syringe Microphone Switch

An ordinary 3mL syringe can be turned into a hand held push button switch to operate almost any 2-way radio.

Step 1: Procure a Syringe

Picture of Procure a Syringe

If you have a condition that requires the use of a Syringe, your condition has finally brought you luck.

If not, then you have to think where you might get just the syringe body.

The syringe must be the kind where the needle unscrews from the body for safety's sake.

Insulin needles don't unscrew. Try hard not to use one, besides, the syringe body is too small.

If you are able to get just the body from your doctor all the better, if not, take it apart and give the parts you don't need back to the doctor.

Step 2: The Switch

Picture of The Switch

This just needs to be a 'Normally Open' push button switch. Like ah door bell switch, only not.

Step 3: Wire

Picture of Wire

A length of small gauge wire from an old 'Wall Wart'  will do.

Cut off the wall wart and the plug that it came with.

Step 4: Snakes and Syringes !

Picture of Snakes and Syringes !

When you cut off the tip of the syringe a nice size hole is left behind to snake the wire all the way through.

Step 5: Solder the Wire to the Switch

Picture of Solder the Wire to the Switch

Both wires get soldered to the switch.

Comments

Dr.Bill (author)2013-06-18

I first saw this in my Elmer's shack although his was made with a piece of plastic tubing he had around. I think I saw it again in QST and that one used a syringe so here it is now not very original I had never thought of the steering wheel app.
WH7WP 73's

KJ4ZVQ (author)2013-06-18

Clever! Iv often thought of building something similar to this,and mounting it to the steering wheel in my vehicle to go along with my headset/mic that I have. Great repurposing!

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