Design & Development of Contact-Less Sanitizer Dispenser Without Microcontroller

Design & Development of Contact-Less Sanitizer Dispenser Without Microcontroller
0

Here is an attempt of development of Contact-Less Sanitizer Dispenser without using microcontroller.
This development is done using an IR Led and IR Photo-transistor as pair of sensor whose output is fed to Op-Amp to compare it with the reference voltage and the output of Op-Amp is driving the transistor as a switch to turn on Load which is 3v - 6v submersible pump in this case.

So the device will simply push out the sanitizer as long as sensor is blocked by the hand within certain range.

photo_2020-07-09_15-11-35

photo_2020-07-09_15-11-16 photo_2020-07-09_15-11-30

Here is the Schematic.

Schematic

For more clear view you may downlaod pdf.
WSD_WoMCU.pdf (25.0 KB)

Here is the PCB Layout.

img1

Here is 3D Board.

img8 img9

photo_2020-07-09_09-47-29 photo_2020-07-09_09-47-34

This circuit can be improved further and other features can also be implemented, so looking forward for the participant to come up with other iterations/versions.

Lets discuss.

Happy Exploration!

4 Likes