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Forum for Electronics

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Site title: Forum for Electronics

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ESP32 USB PD Power Supply Not working

Hi, I built a small USB-C PD trigger and power monitor using an ESP32 and the AP33772S. I designed and assembled the PCB and I’m now trying to get USB-PD working. When I plug in a USB-C PD charger (Apple 20W A2246), the board does not turn on — the TX LED stays off and PD does not start. But when I use a normal (non-PD) charger, everything wo...


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kit iron soldering question

this soldering iron kit on Aliexpress is good and cheap? For repair and maintenance of retro consoles and CRT TVs... Read more


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Pros and Cons of Oversized Isolation Transformer

I'm willing to measure non-isolated or primary side power supply signals connected to 230VAC grid to optimize switching behavior. I need to see rise/fall signals accurately. This is just a beginning and I want my setup to be future proof for motors & solenoids. Aside from differential probes, I've had several doubts about the transformer method. What are the benefits or ...


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IGBT Mains rectifier - can a very high dv/dt blow up the IGBT?

Hi everyone, I am using a 2 IGBTs to rectify AC mains (in a totem-pole pfc) and sometimes the IGBTs goes boom when I switch AC mains on from the wall socket. I am trying to understand what can make the IGBT blow up. There is no voltage spike on collector-emitter.


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Avoid certain area of board for Altium DRC

Hi, How do i do a design rule check for minimum track width which avoids checking a certain defined area of the board? I'm amazed how difficult it is to find out about this, because very commonly, a certain chip may have a pin to pin spacing which is well below the minimum track clearance requirement. Also, you somethimes have a component whose pads are made of multiple track...


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