If you want to connect your SEN-11345 Geiger Counter to the Radiation Network.com all you need is a TTL-232R-5V cable and to connect the red wire to +5, the black wire to GND and the yellow wire to the pin 28 side of R13 (i.e. the green LED output).
If you want to connect your SEN-11345 Geiger Counter to the Radiation Network.com all you need is a TTL-232R-5V cable and to connect the red wire to +5, the black wire to GND and the yellow wire to the pin 28 side of R13 (i.e. the green LED output).