Hi, firstly I'm a complete beginner and would like to learn,
I'm posting in this forum in an attempt to understand how to interface the Pi with a IR receiver,
I know there are how to;s elsewhere but many of them don't explain the basics.
I'd like to connect a TSOP31238 Photo Module to the GPIO of the pi,
Firstly looking at the data sheet we have 3 pins (TSOP31238 )
1 = GND, 2 = VS, 3 = OUT
and the data sheet states
R1 and C1 are recommended for protection against EOS.
Components should be in the range of 33 Ω < R1 < 1 kΩ,
C1 > 0.1 μF.
R1 lies between the +Vs and Vs since the rough maximum mA the module uses is 4.5 mA
using Ohms law R = E/I and since I'll be using pin 1 3.3 V i get R= 3.3/0.0045 = ~733 Ω
So I should use a 733 Ohm resistor to protect my Pi.
Now the Capacitor (which is where I'm stuck)
it states the Cap should be > 0.1 μF but what voltage should it be? Must it be exactly 3.3 Volts?