I have a PCB in which I need to change the crystal. I don't have scope right now with me. So is there any way I can check if the crystal is working or not after soldering it in PCB. I am not good in soldering so I thought there might be some way of checking the crystal so that to confirm that it is soldered correct and working fine. I have this Fluke Multimeter


  • \$\begingroup\$ If you have multi-meter, check continuity of crystal pad wrt respective IC pin. While supply is ON,you can check voltage at crystal pins ( is it varyng or not ). \$\endgroup\$ Dec 29, 2015 at 4:30
  • \$\begingroup\$ yes its also a way to test. Thanks. But I am using a PIC32 and it has very small pins. How to test with them. \$\endgroup\$
    – user007
    Dec 29, 2015 at 4:45
  • \$\begingroup\$ Can your meter measure frequency, and does the frequency of the crystal fall in it's range? \$\endgroup\$
    – Dave
    Dec 29, 2015 at 8:54
  • 1
    \$\begingroup\$ @Dave My multimeter can only read frequency between 10Hz-100KHZ and I am using 8MHZ \$\endgroup\$
    – user007
    Dec 30, 2015 at 4:37

1 Answer 1


Make a half wave voltage doubler from a couple of 1N4148 and a couple of 1nF caps. Now connect the AC input terminal to the chrystal and connect the DVM to the DC terminals.If you have oscillation you will see something like several volts on the DVM .If the rock is dead you will see nothing.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.