current limiter

I’m very rusty with my circuit design skills which I haven’t used in decades, looking for some guidance. In short, I’m looking to limit a constant voltage supply into a load with a max of 4 Amps at 14 V without significantly reducing the supply voltage in the process. Fortunately, I think I can...

Hi all, I have a question about the simplified circuit of the below image. It is about a 16x16 5V LED matrix, controlled via wifi by a controller board with an ESP 8266. I do have more details about all components used, but I try to keep my question simple. :) I can control the LED matrix by...

I'm working on a hobby project and think I can harvest enough power from a slow, TTL level serial link. There are 5 data/control lines (all open collector) and a single ground. Signaling is the typical wired-or in open collector systems, each line relying on a 1k pullup to 5V. Thinking...

Hopefully this is an easy design question to answer. I'll start with some background information. The case is with lithium iron phosphate or LFP batteries that are "48 volts" used for household photovoltaic battery backup. There are many brands and there are different lithium chemistries, but we...