Hi everyone,
I am planning to build a shield for the raspberry pi zero containing a Teensy LC which is used as a HID.
Problem is: Both have power connections. There are three cases, the two MCU's always need to be powered:
1. Power comes from the teensy
2. Power comes from the Raspi
3. power comes from both MCU's (problem?!)
I am not able to put any circuitry like a diode to the power source of the Raspberry pi. I can put whatever in the rectangle in the sketch, but not outside. Right now the solution is a switch which toggles the power to the teensy.
This device is going to be produced a few times and it varies from where the power comes from, and I don't want to have some of them fried because the switch is on the wrong position.
Is there a way of doing this automatically?
Greetings, Andi
(I found a solution which suggests to putt a schottky diode on each side of the +5V power source, but this method cant be used because I cant put anything on the raspi side (second picture)
I am planning to build a shield for the raspberry pi zero containing a Teensy LC which is used as a HID.
Problem is: Both have power connections. There are three cases, the two MCU's always need to be powered:
1. Power comes from the teensy
2. Power comes from the Raspi
3. power comes from both MCU's (problem?!)
I am not able to put any circuitry like a diode to the power source of the Raspberry pi. I can put whatever in the rectangle in the sketch, but not outside. Right now the solution is a switch which toggles the power to the teensy.
This device is going to be produced a few times and it varies from where the power comes from, and I don't want to have some of them fried because the switch is on the wrong position.
Is there a way of doing this automatically?
Greetings, Andi
(I found a solution which suggests to putt a schottky diode on each side of the +5V power source, but this method cant be used because I cant put anything on the raspi side (second picture)
