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Honored ContributorDE1 Board broken??!
Hello,
I added some extra hardware to the Terasic DE1 board by connecting it over the GPIO1 square header. When pressing the power button the board doesn't start up. When I remove my extra hardware it still powers up. However, I noticed that there are some pins not working anymore after trying my extra stuff :( I just drove all pins of GPIO1 high and measured that some pins aren't 3.3V! What's propably wrong with it and what can I do? PLEASE HELP:cry:15 Replies
Altera_ForumI had not noticed.. yes there are many shorts!
- Altera_Forum
Stripboard isn't really suitable for wiring stuff to the GPIO headers on a DE1, because the header pins are only one row of holes apart, so it's tricky to break the tracks between opposite pins on the header.
If you *didn't* break the tracks between them I'm not surprised the board got fried! If you look at the DE1's schematic, you'll see that pin 11 on the GPIO headers carries +5v, but the pin opposite, pin 12, is grounded. Likewise for pins 29 & 30, +3.3v and gnd respectively. With your board connected, +5v, gnd and +3.3v were all shorted together, which explains why it wouldn't start up, and why something got fried. - Altera_Forum
Maybe a large parasite capacitive load..
- Altera_Forum
yeah, that's what I did. But it happened....
What about some fuses? - Altera_Forum
You have to carefully check your pcb before connecting it to FPGA, test it with a low-cost MCU before..
- Altera_Forum
ok
Do you know how I can avoid shorts in the future? Maybe there's something I can solder on my experimental pcbs? - Altera_Forum
I don't have that FPGA unfortunately, only one DE0-Nano..
- Altera_Forum
I don't know where I can find those test points, but there's a 3.3V test point on the pcb which is ok (3.308V).
- Altera_Forum
When you use 7.5V DC adapter or USB cable voltage is regulted to VCCint of FPGA (ex. 1.2 Volt), check if voltage (VCCio and VCCint) on FPGA is ok
- Altera_Forum
What's this onboard regulator you're talking about?
