Using a well-known circuit, I show you how to build a simple computer interface so that your logging software can send CW through your radio. The logging software simulates someone using a straight key. It changes the voltage on an RS-232 pin and the electronic circuit uses a transistor as a switch, grounding the lines as though someone grounded the contacts of a straight key. This interface will let you work a contest or pile-up using your logging software - without having to use a key or paddle. The circuit diagram came from the website of Scott Davis, N3FJP. Scott's AC Log program is also featured in the video - although this circuit will work with any software that uses RTS or DTR to trigger the sending of morse code. (like Ham Radio Deluxe, etc.) The circuit diagram: N3FJP website: Tripp-Lite USB to Serial Converter: =sr_1_2?ie=UTF8&qid=1450572429&sr=8-2&keywords=tripp-lite+usb+to+serial