Is there anywhere on the Jackpot board I can safely pull 5v Power and Ground to run a second ESP32 running Wled? It wont be powering any LEDs, they are 12v and have their own power source. If need be I can pull from that 12v and bring it down to 5v but was hoping there was an easier way. Thinking about pulling from the expansion slot for now. I have plans to use that but not at this time. Anywhere else that’s safe?
1 Like
There should be plenty of overhead in the 9-24V to 5V SMPS on that board, although it will depend on what you’re hanging off it.
I don’t recommend running those ESP32 devkits from 12V, in my experience the linear regulators run super hot and don’t last long that way. Pulling 5V off the Jackpot board or using a 12V to 5V pre-regulator is what I would do. I use quite a lot of VX7805-500 or VX7805-1000 modules in my personal designs, but similar things are also available with flying leads to make them easier to wire up.
2 Likes
It should just be running the ESP32 chip and that’s it. LEDs get power from a 24v to 12v converter separate. I have 5v run to VIN and Ground to Ground. It seems to be running good. Is that not a good way of doing it?
2 Likes
Sounds like the right way to do it, to me.
To be clear, my 2nd paragraph is intended to mean that you should definitely do it that way, instead of switching it over to the same 12V as the lights. It reads a little weird, in hindsight.
5V on the Vin pin is the way to go there.
2 Likes
Awesome. Thank you! Now I just need to find an additional source for 5v when I decide to add my spindle control later. It will be in that slot so that won’t be available anymore
1 Like
No reason you can’t daisy-chain them together. The current limit on one of those pins is ~1-2A ish, which is probably the limit of the SMPS capacity anyway.
There are plenty of buck converter modules that have either screw terminals or flying leads that will take higher voltages and drop them to 5V.
https://www.amazon.com/Converter-Voltage-Waterproof-Regulator-Step-Down/dp/B07Y2V1F8V/
https://www.amazon.com/UCTRONICS-Converter-Transformer-Voltage-Regulator/dp/B07XXWQ49N/
https://www.amazon.com/Wolfwhoop-Converter-Step-Down-Regulator-Stabilizer/dp/B076P4C42B/
2 Likes
Yeah I have a ton of them in a tote inside. Just didn’t want to fool with it LOL. I’m just being lazy. When I get ready to run the spindle control I will most likely switch over to that. Thanks again for all the help!
2 Likes
couldn’t you strap on a 7805 to your 12V led power and run it off that? Does it need to be co-located on the jackpot?
1 Like
That’s the plan moving forward when I add the spindle control
1 Like
Personally, I’d never use a linear reg like a 7805 these days unless I was controlling something low current that specifically needs low ripple and a quiet voltage rail.
The SMPS modules above or the one on the Jackpot are a better solution. More efficient so smaller upstream power supply needed, run cooler, less likely to have unpredictable behaviour under loads outside their thermal envelope, less likely to go unstable with inductive loads that step, etc.
1 Like
Thanks for that good information.
2 Likes
@jono035 is the MAN when it comes to this stuff!!!
2 Likes
