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I'm using four 1N4007 diodes and one 15k resistor. I already changed diodes and cables dozens of times, it doesn't change, even I change the oscilloscope or arbitrary function generator, nothing changes. What can be the problem? I'm using 5VAC at 50Hz.

When I tried the same circuit that I built on breadboard it worked yesterday, but now it doesn't work. It's the same circuit. I didn't even changed anything. How?

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  • \$\begingroup\$ Welcome! Please draw a schematic. \$\endgroup\$
    – winny
    Commented Dec 12, 2023 at 7:51
  • \$\begingroup\$ I added another photo, I'm using a arbitrary function generator, Crocs of the function generator are attached to the jumper cables, blue and white one at the center of diodes \$\endgroup\$
    – Hereforasking
    Commented Dec 12, 2023 at 8:04
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    \$\begingroup\$ The first thing comes to my mind is that the probe GND and the signal generator GND might have somehow shorted. If they are plugged in the same earthed socket then this can happen because the scope GND is internally connected to the earth (PE), and the function generator's output GND might also be internally connected to the earth. Make sure they are not. This will turn your bridge rectifier into a half-wave rectifier. \$\endgroup\$
    – Rohat Kılıç
    Commented Dec 12, 2023 at 8:06
  • \$\begingroup\$ I added a schematic, it's the same circuit as this one. \$\endgroup\$
    – Hereforasking
    Commented Dec 12, 2023 at 8:06
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    \$\begingroup\$ Is the output from your function generator floating? If not, you are shorting the negative half-cycle via your oscilloscope probe ground clip. \$\endgroup\$
    – winny
    Commented Dec 12, 2023 at 9:04

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