Mooshimeter

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  • CapSnap123
    Radio Shack Digital Multimeter Cat # 22-811
    by CapSnap123
    I'm trying to fix a digital multimeter. It was working until I blew the fuse (actually the "buzz" for continuity wasn't working). I've now replaced the fuse but it's acting strangely. When I turn the dial to V, nothing happens. But when I turn to anything else, it makes a continuous, very fast clicking sound - like the piezo buzzer is trying to do something. And at each position of the dial (other than V) there are brief flashes of life on the LCD. It doesn't seem to matter if the probes are connected. I wasn't sure where to start, so I've tested most of the diodes and cleaned the...
    12-28-2024, 06:33 PM
  • mholin
    Beckman Industrial/(later Wavetek) Digital Multimeter DM27XT Repair
    by mholin
    Was testing to see if a bug zapper grid voltage (=< 2800VDC) had discharged yet. Set meter to highest range (1000 VDC) and probed across the grid. Heard an audible arc so voltage must have discharged into something in the front end of the meter. Now all functions that use the V-Ohm/Com input just reads "OL" (over range). Even the continuity test with the probes shorted reads OL with no beep. Opened it up and found input resistor R31 47 ohms, completely open. Replaced with new resistor but meter still reads "OL". The low battery icon on the display is visible even...
    08-18-2024, 12:58 PM
  • dj8452000
    How To Test a P-channel Trench Mosfet Using A Multimeter In Diode Mode
    by dj8452000
    I am new to electronics and I'm understanding most of what I'm reading but I have a mosfet on my board that I've identified as a P-channel Trench Mosfet. I haven't a clue how to test this and what I should expect to see with the multimeter probes. I am hoping someone with years more experience than myself can help me understand how to use a multimeter to read this. Please look at the drawing I have attached to this and can you try to explain to me what I should be doing with my multimeter in diode mode and what results I should expect from a good mosfet?...
    02-18-2025, 08:28 AM
  • sam_sam_sam
    Bought a volt multi meter that is capable of data logging Hantek 365C USB/Bluetooth Data Logger
    by sam_sam_sam
    I have had this in my wish list for quite a while now and I might need to test BMS protection board with this device because of the limitations of the battery testing machine that I have been using

    https://www.aliexpress.us/item/32568...yAdapt=glo2usa

    What this will allow me to do is use my load testing machine that is having issues with the voltage cutoff set/ current meter monitoring system and I decided not to try to replace it or repair it I just going to use a very primitive load testing...
    03-30-2025, 11:05 AM
  • trex66
    Craftsman 82345 Multimeter broke!
    by trex66
    My daily carry just stopped working only me. Started last week with the voltage flickering. Found one lead was broken and I ordered new ones. New leads didn't change anything, it displays “-1” on all settings but on continuity will give the tone when touching. Checked battery and found the fuse blown. Replaced fuse but same results. Cleaned the dial and led display and its parts. Board looks nice and clean no burned or broken components. Nothing traumatic happened to this multimeter I put it aside when I found the lead broken and didn't touch it until I got the neAnyone have any ideas what's...
    3 Photos
    03-04-2025, 04:26 PM
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