A surrogate 2032 coin cell for test or external power provisionDesigned by RossGK Tangibles in Canada
A dummy coin-cell, it replaces a CR2032 coin cell in your circuit-under-test. Something I designed and use to solve a particular challenge. A simple, yet rather precise little item that makes a ted...Read More…
A dummy coin-cell, it replaces a CR2032 coin cell in your circuit-under-test. Something I designed and use to solve a particular challenge. A simple, yet rather precise little item that makes a tedious task much easier. My first Tindie product - getting to know the community and sharing process.
It's a simple dummy coin cell that allows you to test a circuit without soldering or rigging up awkward wires another way. In a new custom circuit, you might have a surprise short with a real CR2032 coin cell, but a current limited supply can catch that before you have a problem. You can also easily use it in series to test the current consumption of your device or circuit. You can similarly use it in parallel to power a circuit from another battery pack to provide longer life. Great when your devices is in an awkward location. I use one in a garage-door-ajar indicator, for example. It's a handy little thing. A 3D-printed disc of precise size, with a copper wire-threading route that covers all the key contact points that various coin-cell holders need. (There are many different holders on the market, you may need to rotate the dummy cell in the holder to get optimal contact).
While precisely a CR2032 size (20mm x 3.2mm), in many coin-cell holders you can use it in a CR2025 or even a CR2016 holder, as the 20mm diameter will fit as long as there's no thickness barrier. Useful in many situations.
I needed to test current consumption in a battery-powered device. Later I wanted to rig up a longer-lived battery supply (eg AA cells) instead of the coin cell. This 3D-printed little item let me do those things quick and easy. See the image of it in a small calculator measuring a 10 micro-amp current draw.
It's easy to use and understand and solves a problem that is a bit fiddly any other way, for very low cost. There are likely many uses I haven't thought of yet. Positive contact on one side plus the edges, negative on the other, just like a real coin cell. The alternative test situation is to solder wires onto your board, or using awkward clips that are difficult on small circuits, or which require disassembly. With this little dummy cell, you just slide it in and you're in business. Shipped pre-threaded with 24AWG wire and 10cm (4") long wire tails, so you don't have to do the fiddly bit.
The item will be either grey or white in colour, depending on stock.
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