I got unlucky and smoked a EBB36 CAN board on it's first power up. It was connected via CAN to an octopus v1.0 board which I assume took some damage because I can't see it via serial. Weird thing is I can still see the EBB via serial if I power it with USB.
The smoked component is what I assume to be a 6A fuse:
![1670609879128.png 1670609879128.png](https://forum.vorondesign.com/data/attachments/0/827-bda24d769454982388c6e28bcb2b4fdd.jpg)
First I'd like to figure out what caused the EBB fuse to blow, and then I'd like to figure out why I can't see the Octopus via serial.
Prior to first power up I modified the EBB36 to take a PL-08 probe @ 24 volts. I PROBALBY SCREWED THIS UP SOMEHOW CAUSING THE BOARD TO BLOW. Here is the modification:
Extra row of headers glued on:
![1670610133587.png 1670610133587.png](https://forum.vorondesign.com/data/attachments/0/828-e3f9ec0cd94380566e3f7139564857fe.jpg)
Then a BAT85 diode was soldered between one of the new pins and pin# PA5 on the EBB, and a jumper was added between another new pin and +24V from FAN0:
![1670610295187.png 1670610295187.png](https://forum.vorondesign.com/data/attachments/0/829-10399787bc9c6b499a7db79267336404.jpg)
Here is the mod in schematic form:
![1670610773630.png 1670610773630.png](https://forum.vorondesign.com/data/attachments/0/830-e16bdfcc5f84b24607616179e56f550e.jpg)
I checked for bad solder joints prior to power up. Everything checked out.
I then plugged my PL-08 into +24V, BAT85, and GND.
I triple checked all my wiring.
I thought this would work but the board blew up. What went wrong?
I should mention that I had everything else hooked up to the board when it blew; heaters, fans, LED's, thermistor, motor. But I think my mod is the most likely culprit so I'm focused on that for now.
The smoked component is what I assume to be a 6A fuse:
![1670609879128.png 1670609879128.png](https://forum.vorondesign.com/data/attachments/0/827-bda24d769454982388c6e28bcb2b4fdd.jpg)
First I'd like to figure out what caused the EBB fuse to blow, and then I'd like to figure out why I can't see the Octopus via serial.
Prior to first power up I modified the EBB36 to take a PL-08 probe @ 24 volts. I PROBALBY SCREWED THIS UP SOMEHOW CAUSING THE BOARD TO BLOW. Here is the modification:
Extra row of headers glued on:
![1670610133587.png 1670610133587.png](https://forum.vorondesign.com/data/attachments/0/828-e3f9ec0cd94380566e3f7139564857fe.jpg)
Then a BAT85 diode was soldered between one of the new pins and pin# PA5 on the EBB, and a jumper was added between another new pin and +24V from FAN0:
![1670610295187.png 1670610295187.png](https://forum.vorondesign.com/data/attachments/0/829-10399787bc9c6b499a7db79267336404.jpg)
Here is the mod in schematic form:
![1670610773630.png 1670610773630.png](https://forum.vorondesign.com/data/attachments/0/830-e16bdfcc5f84b24607616179e56f550e.jpg)
I checked for bad solder joints prior to power up. Everything checked out.
I then plugged my PL-08 into +24V, BAT85, and GND.
I triple checked all my wiring.
I thought this would work but the board blew up. What went wrong?
I should mention that I had everything else hooked up to the board when it blew; heaters, fans, LED's, thermistor, motor. But I think my mod is the most likely culprit so I'm focused on that for now.