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4 votes
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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. ...
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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. ...
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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 ...
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  • 11.8k
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
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  • 1,084
1 vote
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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 ...
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  • 3,699
1 vote
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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.
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  • 498

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