Have you looked at the IRDA port with a camera phone? Some IRDA port’s pulse the same way as a visible LED whilst not communicating via IRDA. The shop pulsecounter will read IR pulses too.
Have you looked at the IRDA port with a camera phone? Some IRDA port’s pulse the same way as a visible LED whilst not communicating via IRDA. The shop pulsecounter will read IR pulses too.