Add a Thermometer to Your Multimeter

Add a Thermometer to Your Multimeter

Hardware hacker Raj wanted to expand the functionality of his multimeter, so he hardwired a temperature sensor to it. When building new circuits, measuring heat tolerance can be important, and this hack makes it easy to do. Using an LM35 temperature sensor, all he has to do is set the multimeter to 200mV and slide a switch at the top. His extensive documentation can be found here if you’d like to do it yourself.

[via Dangerous Prototypes]

6 thoughts on “Add a Thermometer to Your Multimeter

  1. Raj says:

    Hi Michael,
    The temperature sensor used in this project was actually TMP35 and not LM35. Although both of them are functionally the same, the TMP35 can operate at a lower voltage (3V) which is required to make this technique work.

  2. David says:

    That’s a cool hack, i am going to give it a try when i have a spare weekend, see if i can add a thermometer to my multimeter too.

  3. Steven @ Best Multimeters says:

    Interesting addition to a multimeter, i like the innovation but did not have a chance to test it out myself.

Comments are closed.

Discuss this article with the rest of the community on our Discord server!

In addition to being an online editor for MAKE Magazine, Michael Colombo works in fabrication, electronics, sound design, music production and performance (Yes. All that.) In the past he has also been a childrens' educator and entertainer, and holds a Masters degree from NYU's Interactive Telecommunications Program.

View more articles by Michael Colombo


Ready to dive into the realm of hands-on innovation? This collection serves as your passport to an exhilarating journey of cutting-edge tinkering and technological marvels, encompassing 15 indispensable books tailored for budding creators.

Escape to an island of imagination + innovation as Maker Faire Bay Area returns for its 15th iteration!

Buy Tickets today! SAVE 15% and lock-in your preferred date(s).