I cannot get my head around this! So i seek your help and knowledge! My setup:
I got one Arduino 2560, with an ethernet card on it. I build a web interface, where i can use Klik/aan - Klik/uit emitter at 433 Hertz AM. I also can use a 16 relais board with the web interface and i can send IR signals with the same web interface.
I hoped that the IR signals for my LED string and HDMI switches where different, but unformtunally, some colors are the same for hdmi channel 1 and 5. Bummer. So i thought why not have sperate IR Leds and send the signals seperate.
Since i do not got much IO, but a lot of digital outs on the board i thought, why not switch the ground on for 1 IR led and of for the other two. Send the signal, tie the IR led to the receiver. And the other IR led to another IR receiver.
Then i found this topic:
Also see the attachment for the picture.
This is what is said about this option:
I tested it with “standart” one IR LED library. All LED’s are connected to D3 and the other pin - to digital outputs of Adruino. Then we manipulate digital outputs. You need to turn on / off these outputs before sending the IR signal to LED… You can use many IR LED’s (limits only Arduino I/O quantity)
I dont understand how i can manipulate the output as inputs and turn them of, i think i don’t understand this concept.
Can anybody help me with some examples and what does he mean?