In this schematic, we see a 10μF cap (C1). What is its purpose, wired like that?
I duplicated this schematic with two TSOP1236 devices, connected to a LM393.
The TSOP1236 datasheet tells me that, in its typical application, I need a cap between pin 1 GND and pin 2 VS. However, here the cap is inserted between pin 1 GND and pin 3 OUT.
So I thought it must be for protecting the LM311. And since I use a LM393, I now have one cap on each side. However, I would think one cap would be sufficient as connected between LM393 pin 4 GND and pin 8 VCC.
Can someone help me understand?
Would it be better to remove the two caps, one on each side of my LM393, and
- put one 10μF between LM393 pins 4 and 8, and
- put a 4.7μF between TSOP1236 pins 1 and 2?
EDIT: The TSOP1236 tries to detect a 36kHz signal and is connected to an Arduino, via the LM393 voltage comparator. The attachInterrupt() is triggering unexpectedly and I think using caps correctly across my receiver set-up could solve that.