I'm having trouble power my ESP-01. Currently, I'm trying to use the MB-102 power supply with a 9V 1000ma wall charger to power my 5V Arduino nano and 3.3V ESP-01. The nano works fine, but the ESP doesn't seem to get enough power despite the MB-102 power supply supposed to be able to support up to 700ma. I found this buck step down power supply on ebay. Will it be able to power both an Arduino Nano and Esp-01? If not, then what hardware would any of you recommend for this? Thanks!
Are you trying to run the ESP-01 from the 3.3V on the nano? It may not have power - it only has limited output.
The board in your link is not a real buck regulator. It looks like just a couple of three terminal regulators. It might work - the 800ma is probably the regulator spec with a proper heat sink.
No, I'm running it directly off of the MB-102 Power Supply's 3.3V. Also, thanks for letting me know it's not a real regulator
UPDATE: I've plugged in my USB adapter module into the MB-102 Power Supply's USB:
And it appears to work! Is there any issue with running my project like this? Because if not, I'm fine with doing it this way.
Do you have the ESP-01 plugged into some kind of adapter? That may have a 5V -> 3.3V regulator. The USB port on the MB-102 puts out 5V on the USB power pins. If it works that way you should be fine if the adapter uses a 5V input.
The power supply in your link is pretty much a MB-102 without the frills.
You fell into an advertising trap.
They forgot to tell you that max current declines with increasing input voltage.
That 700 500mA is only true with a 6volt input. At 12volt that drops to about 75mA.
Why 9volt anyway. The ESP runs on 3.3volt. And why an ESP-01
A WeMos D1 mini plugged into a 5volt cellphone charger is sooo much easier.
Leo..
Are you using a breadboard?
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