I'm working on a PCB that has a Teensy 3.5, a Raspberry, 2 IC 74HTC245, a photocell resistor, AM2302 temperature sensor, a tilt sensor among others resistors and capacitors.
The main goal is to read some sensors, display results on LED display, and pass the info to the raspberry to upload to a server.
The issue I assume is related to my PCB, I connect the Teensy to the PCB and there is a drop of voltage.
The Teensy is running the SmartMatrix Feture Demo, when the teensy is in "the air", the led work as expected. But when the Teensy is connected on the PCB, the LED turn off and for instance the output A8 PWM gives around 2.2V on the air, but when it's on the PCB the voltage drops to 1.65
Any advice will be appreciated.
Best regards from Chile
Álvaro Monares G.
In the air:
On the PCB
How will it be
The main goal is to read some sensors, display results on LED display, and pass the info to the raspberry to upload to a server.
The issue I assume is related to my PCB, I connect the Teensy to the PCB and there is a drop of voltage.
The Teensy is running the SmartMatrix Feture Demo, when the teensy is in "the air", the led work as expected. But when the Teensy is connected on the PCB, the LED turn off and for instance the output A8 PWM gives around 2.2V on the air, but when it's on the PCB the voltage drops to 1.65
Any advice will be appreciated.
Best regards from Chile
Álvaro Monares G.
In the air:
On the PCB
How will it be