Hi, I'm working on a project that have to do several tasks.
The configuration is an arduino that is connected to another device based on a stm32 chip. The device that i have to control with my arduino has a 3.5mm jack input where I normally connect an infrared sensor.
The device that i have to control is a chrono. Whenever the receiver pass in front of the sender, the chrono will stop the time.
Now the problem is that i need to replace the ir system with the arduino that checks different parameters (so the ir is completely removed).
I pretty much need a way to emulate what the ir senor would send to the device in order to stop the timer. Being a time based project, i need this interaction to be as fast as possible to keep the measurements as true as possible.
I saw that the working voltage of the stm32 is 3.3V so i'll also need a voltage divider in order to send the right voltage. Am I right?
In order to keep it simple I would like to keep the device i'm connecting to as it is, without modifying anything.
I have sampled what the sender is sending but I noticed that the chrono is stopping with any ir signal (tested with a remote of my tv), so this let me think that the subject of the transimission is not very important as long as it's not an error code.
Do you guys have any idea to make this work?