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I made a 5V power supply, but when I connected my multimeter probes to the output lines of the supply it read 60-130V. the voltage after the rectifier should be around 18-19V. If anyone can give a explanation of what went wrong it would be greatly appreciated.

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    \$\begingroup\$ We don't know how you built it or how you measured it and with what you measured it. Your circuit looks OK as drawn but we can't know if what you built matches your drawing. Did you use multimeter, scope, or what meter, and how you connected it where (red lead, black lead, probe tip, probe ground) and what were the scope/meter settings (AC, DC, range, etc). \$\endgroup\$
    – Justme
    Commented Jun 18 at 16:07
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    \$\begingroup\$ Very low battery in your multimeter? \$\endgroup\$
    – winny
    Commented Jun 18 at 16:14
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    \$\begingroup\$ A photograph of your circuit and test setup might be very helpful in getting you an answer to your problem. \$\endgroup\$ Commented Jun 18 at 16:15
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    \$\begingroup\$ @evildemonic here you go misom.org/IMG_1589.jpg \$\endgroup\$ Commented Jun 18 at 16:54
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    \$\begingroup\$ @MOSFET I tried measuring 5V from my bench power supply and my multimeter read 60V, i'll try changing the battery \$\endgroup\$ Commented Jun 18 at 16:57

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Yep, as winny suspected, my multimeter battery was low. Thank you everyone for your help, have a nice day.

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