ESP32 5Volt GPIO Outputs
Posted: Thu Feb 06, 2020 11:25 am
Hi,
I'm not even sure the Title of the Topic is correct.
Actually I'm searching for a schematic to interface a Keyes Laserpointer.
I have 5 Volts connected to my board, using an AMS1117 chip to give the ESP32 3.3 Volts.
The Laser is connected to 5V and GND and I want to switch it on and off connecting the Signal-Pin to GPIO.
Unfortunately 3.3 Volts on the signal-Pin of the Laser only creates a dim Point ...
If I breadboard the signal-PIN to the 5Volts on the board, the Laser is at it's maximum.
I found a lot of scematics using Optocouplers to Oputput a 2nd Voltage or StepUp Electronics or OpAmps ...
But actually I already have 5 Volts and they share a common GROUND on the AMS1117.
Wouldn't some simple NPN Configuration do the job?
I tried several configurations on my breadboard but I can't figure it out ...
Hope someone could point me to a simple solution using discrete parts.
Best Regards
Robin
I'm not even sure the Title of the Topic is correct.
Actually I'm searching for a schematic to interface a Keyes Laserpointer.
I have 5 Volts connected to my board, using an AMS1117 chip to give the ESP32 3.3 Volts.
The Laser is connected to 5V and GND and I want to switch it on and off connecting the Signal-Pin to GPIO.
Unfortunately 3.3 Volts on the signal-Pin of the Laser only creates a dim Point ...
If I breadboard the signal-PIN to the 5Volts on the board, the Laser is at it's maximum.
I found a lot of scematics using Optocouplers to Oputput a 2nd Voltage or StepUp Electronics or OpAmps ...
But actually I already have 5 Volts and they share a common GROUND on the AMS1117.
Wouldn't some simple NPN Configuration do the job?
I tried several configurations on my breadboard but I can't figure it out ...
Hope someone could point me to a simple solution using discrete parts.
Best Regards
Robin