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Icom IC-R2 Serial Cables A serial cable provides quick and easy programming of memory channels, memory names and set mode contents via a PC. NOTE: All interfaces are constructed at your own risk. I will not be held responsible for any damage to scanners and/or computers caused by the use of these interfaces There are some links to upload/download software here. MAX233 Serial Cable Schematic This is a very simple serial interface for the Icom R2 utilising the MAX233 IC. The MAX233 is a simple TTL/CMOS to RS232 level converter in a DIP package. Pin numbers in brackets are for 25 pin RS232. Note: Ari Xirocostas found that this circuit didn't work at all for him but he sent me a modified version which did. Ari's version has a modified power supply to the MAX233 IC, another option would be to do away with the connection to pin 14 and instead connect an external PSU to pin 7 to provide the +5V for the IC. This may well be a better option as some serial ports may not be able to reliably power this circuit.
Icom OPC-478 Serial Cable Schematic This schematic is for the original Icom OPC-478 cable, for use with the ICOM R2, R3 and the R-10. Click the diagram for a larger image. Key.
The IN/OUT connection attaches to the RING of a 3 conductor 3.5mm jack plug. The ground connection attaches to the sleeeve of the 3.5mm jack plug.
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