Pulsed infrared sensor to detect the presence of a person or object whereupon a solenoid is activated to regulate fluid flow

Pulsed infrared sensor including a solenoid to detect the presence of a person or object whereupon the solenoid is activated to regulate fluid flow, comprising:

• a control circuit having a power supply for supplying required power to said solenoid for operation thereof;
• means including at least one LED (light-emitting diode) for transmitting pulses of infrared light energy with a digital code towards the person or object;
• means operatively associated with said transmitting means and responsive only to said digital code for receiving the light energy reflected from the person or object;
• a microcontroller responsive to operational amplifier means delivering a train of pulses for recognizing said train of pulses;
• means for controlling the distance at which the person or object can be detected;
• means for determining the amplitude of the signal reflected and received by said receiving means, including means for adjustment of the amplitude;
• and
• adjustment means coupled with said solenoid and operatively coupled with said microcontroller including means for setting a binary coded decimal switch means for controlling the duration that the sensor will operate the solenoid.