IR TSOP proximity Sensor module

              IR light based sensing. Normal photo diode based proximity sensors  are prone to the IR content in sunlight. So it can cause unnecessary false triggering. In order to avoid that, TSOP based photo sensors are used. They are designed to accept and demodulate only a particular frequency band of the IR signals. This module is using a Tsop1738 sensor, which can accept only 38KHz band. Thus avoiding the false triggers. Pulse generation, reception and load control functions are carried out by a PIC16F microcontroller IC. The system can be configured to operate with either 24V or 12V power supplies. Board is designed to drive the output load through a MOSFET driver. The load On time can be varied from 0.15sec to 3.2sec using a trimmer Pot on the PCB. The sensing range also can be varied using another POT. Sensor parts are mounted on a daughter board, so that it can be mounted as per the convenience.