Most of the time the circuit works well. But sometimes it gets stuck and does not respond.
When that happens, i disconnect the upper left BLUE wire at “Disconnection point A” (please look at image) and then immediately reconnect it and things go back to normal and it works well again.
Is there some kind of capacitor or diode or other electronic component that i can add to this circuit, which would eliminate that problem?
Please take into consideration, that the information in the link only guided me generally in building the circuit here.
Anyway - the circuit here is working most of the time very well and then only occasionally gets stuck and when disconnecting the wire described above, it all works again.
So my best guess is that the problem results from some sort of electronic DC current overload or under-load and not from software or signal processing or other options.
Any chance of getting a schematic of that amplifier x20 ? And why does the IR transmitter not have the Vcc pin connected to something? (and a schematic of this one too)
Finding the schematics of these components might be a problem, since the seller on Ebay would probably not have one.
Do you think i should consider to connect the 5V IR transmitter pin to the Arduino 5V supply?
The reason it is not connected, is that it works OK without it - beside the problem i described. Do you think this would be the solution to the problem? I will try and let you know if that solved the issue…
Same goes for this one as the amplifier, I cannot tell what components are on it and how the traces go in it based on your picture. If there is a supply voltage pin you can bet on it that it is needed to function.
Without knowing how it works, there is no way to explain why it is failing, even to explain why it works with not all pins being connected.