Hi all,
I am trying to build an interface to connect a transceiver to my pc in order to experiment with some data modes over the radio. I will use the sound card to produce the signals but intend to use the serial port to control the PTT (Push to talk). I have found an example of a circuit for this and it says to use the 4N32 opto coupler in order to protect the radio from the pc (and presumably vice versa).
**broken link removed**
What I wanted to know is whether this circuit would form the switch that I need. Also, having looked to buy the components there are lots of opto couplers/isolators around and I dont know why this one is better than others. This one seems to have a second transistor whereas the others have single ones, what difference does this make?
I am fairly inexperienced with actually using semiconductors in circuits as I have always stuck with relays that I could understand.
Thank you for any light you can shed on this!
Max
I am trying to build an interface to connect a transceiver to my pc in order to experiment with some data modes over the radio. I will use the sound card to produce the signals but intend to use the serial port to control the PTT (Push to talk). I have found an example of a circuit for this and it says to use the 4N32 opto coupler in order to protect the radio from the pc (and presumably vice versa).
**broken link removed**
What I wanted to know is whether this circuit would form the switch that I need. Also, having looked to buy the components there are lots of opto couplers/isolators around and I dont know why this one is better than others. This one seems to have a second transistor whereas the others have single ones, what difference does this make?
I am fairly inexperienced with actually using semiconductors in circuits as I have always stuck with relays that I could understand.
Thank you for any light you can shed on this!
Max