Flashfreeze
- Aug 20, 2018
- 3
- Joined
- Aug 20, 2018
- Messages
- 3
Hi, I'm very new to electronics so any advice on my current observation is very much appreciated.
I'm wiring a TSOP34838 to a raspberry pi to try and send some signals to execute a program with Lirc. The wiring is pretty simple, 3.3 input, ground to ground, and receiver output to GPIO pin 7. Wiring is directly from receiver pins to the gpio.
I saw that Lirc did not register any input at all. So I measured the voltage drop when a remote is pressed and found that the voltage of the output pin did not drop to 0v when the remote is pressed; but only by 10% (3.3v down to 2.9v). I've tested 4 other receivers and they produce similar results.
My understanding is that receivers will drop the voltage down to 0 when it receives a signal, allowing the gpio to sense an input. Is there a fundamental mechanism I'm missing here?
I'm wiring a TSOP34838 to a raspberry pi to try and send some signals to execute a program with Lirc. The wiring is pretty simple, 3.3 input, ground to ground, and receiver output to GPIO pin 7. Wiring is directly from receiver pins to the gpio.
I saw that Lirc did not register any input at all. So I measured the voltage drop when a remote is pressed and found that the voltage of the output pin did not drop to 0v when the remote is pressed; but only by 10% (3.3v down to 2.9v). I've tested 4 other receivers and they produce similar results.
My understanding is that receivers will drop the voltage down to 0 when it receives a signal, allowing the gpio to sense an input. Is there a fundamental mechanism I'm missing here?