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Open-Source Non-Contact Hand Sanitizer Dispenser [Pro]
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Open-Source Non-Contact Hand Sanitizer Dispenser [Pro]

by sam_moshiri on Fri Aug 07, 2020 8:34 am

Features

High stability and no sensitivity to the ambient light
Laser-cut acrylic (plexiglass) enclosure
Cost-effective
Flow control capability of the hand-sanitizer/alcohol (efficiency)
Through-hole components (easy to solder)
Single-layer PCB board (easy to fabricate)
Single and cheap ATTiny13 microcontroller
Low standby current consumption



As we all know, the COVID-19 outbreak hit the world and changed our life. In this condition, alcohol and hand sanitizers are vital, expensive, and in some areas hard to find fluids, so, they must be used properly and efficiently. In the second version of the hand sanitizer dispenser device, I have addressed the previous design problems and introduced a device with no sensitivity to the ambient light and flow control capability of the alcohol/sanitizer. Therefore just enough amount of liquid will be poured on each request. The design uses a cheap ATTiny13 microcontroller.


YouTube: https://youtu.be/OJgx_jHHoqU


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References

Source: https://www.pcbway.com/blog/technology/Automatic_Hand_Sanitizer_Dispenser__Version_2___Using_ATTiny13.html

[1]: TSOP1738 datasheet: https://www.batronix.com/pdf/tsop17xx.pdf

[2]: 2N7000 datasheet: https://www.onsemi.com/pub/Collateral/NDS7002A-D.PDF

[3]: ATTiny13 datasheet: https://componentsearchengine.com/Datasheets/1/ATtiny13-20PU.pdf

[4]: BD139 datasheet: https://www.st.com/resource/en/datasheet/bd140.pdf

[5]: 2N7000 schematic symbol and PCB footprint: https://componentsearchengine.com/part/1011182/model/download

[6]: BD139 schematic symbol and PCB footprint: https://componentsearchengine.com/part/1041398/model/download

[7]: ATTiny13 schematic symbol and PCB footprint: https://componentsearchengine.com/part/235118299/model/download

[8]: CAD Plugins: https://www.samacsys.com/library-loader-help

sam_moshiri
 
Posts: 24
Joined: Thu Apr 25, 2019 4:27 am

Re: Open-Source Non-Contact Hand Sanitizer Dispenser [Pro]

by sam_moshiri on Mon Aug 10, 2020 12:06 pm

Bill of materials

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sam_moshiri
 
Posts: 24
Joined: Thu Apr 25, 2019 4:27 am

Please be positive and constructive with your questions and comments.