Contactless Sanitizer Dispenser for Indoor and Outdoor Application

Ready to use just connect pump and power supply

NOTE: This document covers the proper methods for handling Electronic circuit boards.
Handling Electronic Assemblies and PCB
⦁ When doing connection PCBs make sure the power is turned off and the circuit is disconnected from the power source.
⦁ Maintain as little hands-on contact with assemblies as possible.
⦁ While handling PCBs, hold them gently by the edges.
⦁ Your hand should never be wet when working with PCBs.
⦁ Components should be handled by the edges when possible. Avoid touching the component leads.
⦁ When not being worked on, PCBs should be placed in a properly insulated surface.
⦁ While connecting the wire to the screw terminal, you must always connect negative wire first.
⦁ Mount PCB using surface space so that there is a gap between bottom of PCB and Mounting surface

Specifications and Features:

⦁ Input Supply Voltage 7 -24 Volts.
⦁ 5V, 9V, 12V, 18V, 24V pump Supported.
⦁ On time Adjustable using potentiometer 0-5 Sec default ( can be customeized as per need)
⦁ Range Adjustable using potentiometer 2 cm -15 cm ( can be customeized as per need)
⦁ Power and Output Sensing LED. ⦁ Reverse Voltage protection.

Logic for Dispenser Controller Circuit:

1. Module will keep pump off until hand is detected by sensor.
2. When the sensor detects hand, module will switch on the pump and pump remains on until time expires (this time is set using potentiometer).
3. Once time expires, pump will remain off even if hand is below sensor, this will prevent the over dispensing of sanitizer.
4. When the sensor detects hand, module will switch on the pump and if hand is removed before the time period set by the user, module will switch off the pump as soon as hand is removed, preventing wastage for sanitizer.


Consider Module time is set to 2 seconds using Onetime potentiometer. Case 1: Hand is kept below the sensor and pump starts, but user didn’t remove the hand for next 4 seconds then
Module will switch on the pump as soon as hand is detected and keep the pump on for 2 seconds, then module will switch off the pump and keep the pump off until hand is removed. Hence preventing of over dispensing of sanitizer. Next time, when hand is again detected pump will start and same logic is implemented.
Case 2: Hand is kept below the sensor and pump starts, but user removes the hand after 1 second only.
module will switch on the pump as soon as hand is detected and keep the pump on for 1 seconds, but as soon as it detect the hand is removed, it will switch off the pump. Hence preventing the wastage of sanitizer


The Box Contains the following Sensor(IR or Ultrasonic as per requirement) items as shown in Figure. Potentiometer – potentiometers in the module are used for adjusting the time range for the operation of the pump and the sensitivity range of the sensor. LED – LEDs in the module is used for Indication whether the module and pump is in on or off condition. Dispenser Module – The board where the whole assembly will be mounted and the power supply and pump connection will be given


Ultrasonic sensor based for Outdoor Application

IR sensor based for Indoor Application

Step 1- Remove all the components from the packet and check the number of items. Provided as shown in Fig.
Ultrasonic based dispenser module
IR Sensor based dispenser module

Step 2 – Mount all the items to the Module as shown in fig

Potentiometers will be connected to time and range terminal and LEDs will be connected Output and Power terminal (You can connect any LED and potentiometers to the terminal both of them are the same).

Step 3 – After mounting all the items the PCB Will look as shown in fig 

Step 4 – Mount the wires of Pump and power supply in screw terminal as shown in fig:

Step 5 – Connect wires to pump and power supply.

Step 6 – Connecting the jumper depending upon the motor voltage.
If you are using a motor of 5 volts than connect the jumper to supply between PWR and MTR as shown in fig

Fig for 5 volts pump
Fig for More than 5 volts pump

Note :- If you are using motor more than 5 volts than connect the jumper to supply of between PWR and SEL as shown in fig

Step 7- Turn on the power supply and your automatic sanitizer dispenser is ready.

Step 8- Adjust the on-time of pump and detection of the sensor by rotating the potentiometer shaft as shown in fig