Hello,
I'm building commercial project based on esp32. It uses ESP-wroom-32 module, instrumentation amplifier and one mosfet. ESP32 is in BT mode. It is used in motorcycle so I would like to power it from ignition coils 14.8V. But how?
I've tried using AMS1117-3.3, but that overheats and shuts down.
Other thing was cheap step-down converter from aliexpress. It works, but I don't think that's good idea to use that in comercial product, because it has to comply with RED/EMC.
Any other sugestions how to power up module without using several linear voltage stabilizers?
ESP-Wroom-32 powering
Re: ESP-Wroom-32 powering
I don't have any Problems with the AMS 3.3 maybe you have a wrong resistor or broken C
Re: ESP-Wroom-32 powering
How come You don't have any problems?
When powering from 14.8V to 3.3V at 130mA it has to dissipate almost 1,5W. Isn't that much for SOT-223 package?
I'm using 10uF at both sides.
Even 3.3V regulator in TO-220 package is not enough and overheats..
When powering from 14.8V to 3.3V at 130mA it has to dissipate almost 1,5W. Isn't that much for SOT-223 package?
I'm using 10uF at both sides.
Even 3.3V regulator in TO-220 package is not enough and overheats..
Re: ESP-Wroom-32 powering
Use switching instead of linear regulator
You are building a commercial project and have to ask about how to power it !?
You are building a commercial project and have to ask about how to power it !?
Re: ESP-Wroom-32 powering
I would use switching regulator if i know how. I've never used them and I'm a little worried about noise emissions.
Are there some guide that would help me to design circuit that will comply with standards?
Are there some guide that would help me to design circuit that will comply with standards?
Re: ESP-Wroom-32 powering
You can start with a step-down module like this one.
I've used it and it works very good, I don't think you have to worry about noise emission.
Later, if you make your own PCB, you can integrate the circuit on it, the chip used is MP2315.
I've used it and it works very good, I don't think you have to worry about noise emission.
Later, if you make your own PCB, you can integrate the circuit on it, the chip used is MP2315.
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