Fresh hacks every day
The fun of having a giant resistor-shaped Ohmmeter is that it reads back the resistance by displaying the color code. If you're not too hot with decoding those bands there's a helper band to the right which will display the value numerically. All of the electronics are housed in the opaque part of the resistor, making for a nice low-profile base. The bent leads are hollow and allow … [Read more...]
This is a scratch-build meter for measuring the internal resistance of Lithium Polymer cells. [Bleuer Csaba] uses the LiPo cells for RC vehicles and thet take quite a beating from the motors they're supplying. This means that he only gets about 100-200 cycles out of each cell. To figure out where one is in its life cycle you can measure the internal resistance where a rising resistance … [Read more...]
SMD parts are great; they allow you to pack more parts on a board, do away with drilling dozens of PCBs, and when done correctly can produce a factory-quality board made in a home lab. There's one problem with SMD parts; troubleshooting and measuring them. The ideal solution would be something akin to the Smart Tweezers we've seen before, but this fabulous tool costs three hundred bones. [Kai] … [Read more...]
This multimeter add-on is called the Half Ohm. It allows you to measure small resistance values, and can be used to track down shorts on a PCB. The board acts as a pass-through for both probes. When your meter is set to measure voltage and nothing is connected to the probes the display will read out the level of the coin cell that powers the add-on. When you are probing, the value in millivolts … [Read more...]
[Noel] does a lot of SMD work and wanted a pair of “smart” tweezers that could be used to place components as well as for reading their capacitance and resistance values on the fly. As we have seen, these things can be somewhat costly, and not really necessary if you already have a good multimeter. With that in mind, he figured he could build his own for almost nothing. He started off with … [Read more...]
While working on electronics projects, it’s often necessary to test out different capacitance or resistance values as things are moving along. Depending on what you are testing, this can be a tedious process even when using a breadboard. Instructables user [mattthegamer463] recently built a very useful device that would help out in these situations, and would likely be a welcome addition to any … [Read more...]
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