It’s entirely possible to make your shunt resistor. If you need to have a shunt resistor to measure the flow of current through an electronic device, battery, or anything that runs on electricity, you don’t have to purchase one of these devices.
(Although a store-bought one is always going to be more accurate than one that you make yourself.) Instead, you can make one yourself out of items on hand. Here’s what you need to do to make your shunt resistor at home, courtesy of Ammeter Shunts.
Gather Your Materials
To make a shunt resistor, you’ll need some very specific materials. You need to have heat shrink wrap in different sizes (or one big piece that you can cut down to size if needed), exactly four-ohm resistors (the 1-ohm kind are perfect), and two metal alligators clips.
You’ll also need some tools, including a heat gun, solder, soldering iron, and several screwdrivers. Plus time. You’ll need some time to put all of this together properly.
Start Building Your Shunt
Step-by-steps a shunt from Ammeter Shunts, it’s arriving in one piece, ready to use. However, we’re here to walk you through the process of building your shunt, so here’s the next part of the process assembly.
You’ll need to start by fitting the resistors into the alligator clips. This can be tricky since they must be placed within the open clip to stay in place securely. You might have to twist them a bit to make two of the resistors fit into each clip.
Once they’re in, you can solder them into place and then pull the wires on the resistors through the bottom of the clip so that they’re exposed beneath it.
Shrink Wrapping It All Together
At this point, you need to get out your shrink wrap. Cut the shrink wrap into small pieces that are just big enough to fit over the alligator clip while leaving the wires exposed. This will ensure that those resistors aren’t going anywhere. Start with the first clip.
Once it’s shrinkwrapped, you need to connect its loose wires to the second alligator clip. Shrinkwrap them into place. Voila! Now you have your very own shunt.
The only downside is that it doesn’t connect to an electronic device that will tell you exactly what the current is, but you might be able to make do without one.
Test Out Your Shunt
Now, it’s time to test that shunt. Find an electronic device or a battery that you can test. Hold one of the alligators clipped resistors to one end and the other end to the opposite end of the device or battery.
Be very careful not to get shocked (although the shrink wrap should help prevent that.) Now, it’s time to see if your shunt works!
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