June 2010
I have puppets which I can control with a servo controller board attached to the serial port of the computer. I want to record the serial out to audio, burn a CD, and then play the audio from the CD and send the output to the servo controller board, as though it were coming from the serial port of the computer. Anyone have an idea or could help design a hardware solution to this need?
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If the program does not require a response from the puppets, you could try connecting the serial output of the computer to a modem (RS-232 connection) and recording the modem output (telephone line) on an audio CD. Then connect the modem (RS-232) to the puppets and the modem (telephone line) to the audio CD output.
You may need an amplifier between the CD output and the modem to get a high enough signal to the modem. You might have to change some dip switches in the modem or change some of its settings from the computer such as: don't wait for dial tone; go off hook. You might end up needing a microcontroller between the modem and the puppets to control the modem - like a PIC chip, Basic Stamp, or PicAxe.
