ghostintranslation
Well-known member
Hi,
I'm working on a complex board for a Eurorack module, that includes a 7805DT power regulator that can take 12v and convert it to 5v. I'm so powering the board and the Teensy 4.0 with this 5v.
Everything on the board works, it runs the program, I can address all chips etc..., but after 10s the surrounding of the power regulator gets burning hot.
If I remove the Teensy from the board though, it doesn't get hot at all.
So I am guessing there is a short somewhere around the regulator but when I mesure voltages, I get the expected 12v or 5v. For example the Teensy 5v pin is getting 5v.
Also when powered via USB it all works fine. (and I'm not trying to have USB + power at the same time here).
Here is the schematics and pcb:
See the power part on the schematics is on the bottom left, and the regulator is on the bottom right on the pcb.
I don't know how to find the source of this kind of issue so any suggestion would help.
Thanks
I'm working on a complex board for a Eurorack module, that includes a 7805DT power regulator that can take 12v and convert it to 5v. I'm so powering the board and the Teensy 4.0 with this 5v.
Everything on the board works, it runs the program, I can address all chips etc..., but after 10s the surrounding of the power regulator gets burning hot.
If I remove the Teensy from the board though, it doesn't get hot at all.
So I am guessing there is a short somewhere around the regulator but when I mesure voltages, I get the expected 12v or 5v. For example the Teensy 5v pin is getting 5v.
Also when powered via USB it all works fine. (and I'm not trying to have USB + power at the same time here).
Here is the schematics and pcb:
See the power part on the schematics is on the bottom left, and the regulator is on the bottom right on the pcb.
I don't know how to find the source of this kind of issue so any suggestion would help.
Thanks