educa
Active member
Hi there,
I want to use a teensy 3.6 to connect to a laser diode with ttl input.
This laser is at this moment connected to A9 (the ttl enable) and I can fire the laser by setting this pin HIGH and stop firing by setting it LOW.
But..... upon reset, it looks like this pin gets HIGH (or undefined) or about a second. This means than when I reset the teensy, my laser gets a GO signal and fires.
Is there a way to safely solve this? Can I somehow make sure that upon reset this pin is pulled to gnd? Maybe on the teensy itself or maybe using external stuff like a pull down resistor? (if a resistor, then what value would be a safe value) ?
I don't neccesarily have to use pin A9 to shoot the laser. If another pin would be better suitable then thats OK too , but upon reset I would have to be sure that the laser doesn't see a TTL high signal on this pin and doesn't shoot.
Kind regards,
Bart
I want to use a teensy 3.6 to connect to a laser diode with ttl input.
This laser is at this moment connected to A9 (the ttl enable) and I can fire the laser by setting this pin HIGH and stop firing by setting it LOW.
But..... upon reset, it looks like this pin gets HIGH (or undefined) or about a second. This means than when I reset the teensy, my laser gets a GO signal and fires.
Is there a way to safely solve this? Can I somehow make sure that upon reset this pin is pulled to gnd? Maybe on the teensy itself or maybe using external stuff like a pull down resistor? (if a resistor, then what value would be a safe value) ?
I don't neccesarily have to use pin A9 to shoot the laser. If another pin would be better suitable then thats OK too , but upon reset I would have to be sure that the laser doesn't see a TTL high signal on this pin and doesn't shoot.
Kind regards,
Bart