Proximity Water Bottle

About the project

Proximity Water Bottle lights up itself when you search for it.

Project info

Difficulty: Moderate

Platforms: Cypress

Estimated time: 1 hour

License: Creative Commons Attribution CC BY version 4.0 or later (CC BY 4+)

Items used in this project

Hardware components

KEMET Electronics Corporation Proximity Sensor- Pyroelectric Infrared Sensor Module KEMET Electronics Corporation Proximity Sensor- Pyroelectric Infrared Sensor Module x 1
Cypress PSoC 4 Prototyping Kit Cypress PSoC 4 Prototyping Kit x 1
Li-Ion Battery 1000mAh Li-Ion Battery 1000mAh x 1
LED (generic) LED (generic) x 4

Hand tools and fabrication machines

Soldering Gun Soldering Gun x 1


Proximity Water Bottle:

Sometimes I woke up in mid night and search for my water bottles near bed or in dining table. when you wake up suddenly its difficult to identify in the dark. So I build this PIR water bottle which can be identified in darkness by waving your hands. The range is depends on how we mount the sensor.

Another thing sometimes we forget to drink water while working on it (office) even though the bottle is in-front of you. This bottle can blink and reminds to drink water.

I took KEMET sensor SS-430L, I had to hand solder with wires to take out the pins since I did not got connector.

Here is the pin details:

The datasheet is here

I interfaced the sensor with PSoC4 MCU, and the board I used is custom one (my design), I had to cut the board to fit into bottle cap.

The PIR sensor was kept inside the bottle cap, and some LED's too. PSoC4 counts the interrupts from sensor and turn on the lights. Also it has heart rate feature to wake the lights up and alert the user to drink water.

The circuit is very simple, I sourced the power from Li-Po battery ( 3.2V) for my requirement.

PIN1 - Power - 3.2V

PIN2 - Gnd

PIN3 - P0_1 (PSoC4 Interrupt)

LED's - P1_7 (PSoC4)


People may think why we want this, but there are some use-cases are in my mind with Proximity water bottle.

1. You can find your bottle from dark places.

2. Kids will love this lights feature with more color combinations

3. Drink water reminder with blinking lights.

4. Differentiate between others water bottle with colors ( RGB choose your own color)

5. Adding vibration motor along with LED's to help blind people to reach their bottle.

There could be many with water bottle. This is how the bottle looks in the dark

The working video is here on YouTube.

Schematics, diagrams and documents

Block Diagram




Photo of ashokr


Hello! I’m Ashok. I’m currently working as software engineer. passionate about doing Hobbies Projects and Animations works.


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