4
votes
Accepted
PCB Design Review Request
Sanity check: with 5V power supply and blue LEDs (say Vf=3V3) you got 1V7 dropout on the TLC5946 driver. With red LEDs (Vf=1.8V) you got 3.2V dropout.
The current source has enough voltage to work.
...
4
votes
What's missing here? (DB1) LED bar
Yes, it's a bridge rectifier. Something like an HD-06 (available from other suppliers). but check the dimensions. Also the traces may be damaged so they may have to be jumpered to the correct places.
...
3
votes
Bridge Rectifier Problem or something else?
The diode rating appears to be ok. But I cannot tell from the google drive schematic how these are even used, so cannot tell if the surge current would exceed 70A.
The issue is most likely ...
2
votes
FTDI FT232RL on custom PCB works only when warm
You forgot to connect the TEST pin to GND.
It's always a good start to compare your schematics to the configuration specified by the datasheet.
Source: Datasheet
1
vote
Accepted
KiCad EeSchema search for net by name
The easiest way in KiCad version 6 is to have both PCB Editor and Schematic Editor open at the same time. In the PCB Editor, use the menu option "Inspect->Net Inspector"
There, you can ...
1
vote
Accepted
Bridge Rectifier Problem or something else?
Diode D1 (1N4148) cannot handle the high reverse voltage and is of no use here anyway. It's just a short circuit after some µs.
Only top scored, non community-wiki answers of a minimum length are eligible
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