Apr 19, 2010 · When building a 3v power supply, why not use a 7803 voltage regulator in place of a LM317? Using a LM317 requires 2 to 3 resistors, 7803 does not. Am I missing something?

May 21, 2020 · Does anyone have LTSpice symbol files for LM7805, LM7809, LM7812? I need them for my final project. I've tried searching everywhere but can't find em so I'm now here. Please help. Thank you ^_^

Jun 6, 2019 · If you use a 12V to 3.3V buck converter, for a 3.3V .30mA application. Will it (the converter) drain your small ah battery fast?

Aug 27, 2024 · Use something like the popular LM7805 5 volt regulator. With the exception in your case, needing 3 volts, I believe would be a LM7803. I'm pretty sure they make them in 3 volt. As you can see by the part numbers that the last 2 digits is the regulated output. They are very simple to hook-up only 3 connections.

Jul 14, 2012 · I would think it depends on what u will be using the 3V for.. When I needed a voltage source to drive two 3.3V ICs, I used an encapsulated DC-to-DC converter (eg, Mean Well DKA15A-05) to step 12V down to 5 then an LM1117.

Nov 24, 2006 · I have a PIC18F2455 running at the approx 5V of the USB. I want to achieve two-way communication with a 3V device. There are only two wires: GND plus a data line. The system is symmetrical. Either device can talk first, and they take it in turns to transmit. When listening, they provide a...

Jul 24, 2012 · Would it be a good idea to add a LM7803 or similar to ensure the voltage does not fluctuate too high -- but change the voltage divider resistors to drop the 33VDC down to something closer to 7-8VDC? Perhaps it's nothing to worry about.. Just curious..