The circuit is designed by Matti Eskola 1995. Even though the circuit
has been carefully tested, no warranties can be granted. You'll need some
experience in electronics before you can start. All information presented
here is as is, no warranties and so on...
Another circuit utilizing the max232 IC is available at http://www.geocities.com/SiliconValley/Haven/5371/indexe.html
This page is maintained by Kirmo Uusitalo.