Hi,
The ASR33 as you mentioned is actually current loop. It is 20mA. Open circuit voltage is around 75V or so as I recall. You could use an optical isolator and small transistor to drive the teletype from an Arduino pin.
Hi,
The ASR33 as you mentioned is actually current loop. It is 20mA. Open circuit voltage is around 75V or so as I recall. You could use an optical isolator and small transistor to drive the teletype from an Arduino pin.