Automatic Filling System

This is an automatic liquid filling system

It is operated and controlled by a CYD via touch input

The device has preset quantities:

2cl/4cl/100ml/250ml/500ml

The quantities can be calibrated directly on the device via the offset setting, or

you can set your desired quantity, for example, if you need 700ml, select 500ml + 200ml offset

Pressing the button starts the filling process, and it ends automatically

Press the button twice while the pump is running = EMERGENCY STOP

Suction/Cleaning function: The pump runs as long as the button is pressed

In the upper left, there is temperature monitoring of the enclosure interior. The 5V fan ensures circulation

In the lower right, there is a bottle counter for each completed filling process. To reset, power cycle the CYD

The system is designed for various bottle sizes. This can be adjusted with the Dum-E arms

Electronic components:

• CYD ESP32-2432S028R https://www.amazon.de/dp/B0FX4TV61K?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
• 1 channel 3V relay low trigger https://www.amazon.de/dp/B0DBZQVWPM?ref=ppx_yo2ov_dt_b_fed_asin_title
• 5V step-down converter https://www.amazon.de/dp/B0F4DHMPXF?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_3
• 12V 5A power supply https://www.amazon.de/dp/B07GFFG1BQ?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
• Peristaltic pump 500ml/min https://www.amazon.de/dp/B085NMHFYW?ref=ppx_yo2ov_dt_b_fed_asin_title
• Cable 0.75mm² red/black
• JST cable with 1.25mm connector https://www.amazon.de/dp/B0BNF8949T?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
• JST 2.54mm jumper cables
• 5V fan https://www.amazon.de/dp/B07X37NXGX?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2
• 5A/2A fuses and holders
• Temperature sensor DHT22
• micro USB cable (power only) https://www.amazon.de/dp/B0CWNTZMG2?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_6&th=1
• Push button Ø9mm

Heat-set inserts:

• M3x5.7x64.6 18x
• M4x8.1x6.3 1x
• M5x9.5x7.1 4x

Screws:

• M5
• M4
• M3

Other parts:

• Silicone hose 6x8mm https://www.amazon.de/dp/B07T22ZZ9J?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

Star nut positions:

Circuit diagram for the electronics:

In the Arduino IDE, insert the sketch code from the text file and in a new tab, insert the code from Background.h and name it accordingly

Test your pump to see how many ml/min it actually does and change it in the code. (Mine actually had 600ml/min)

// Pump control
const float mlPerMin = 500.0; // Enter pump performance here
bool pumpRunning = false;
unsigned long pumpStartTime = 0;
unsigned long pumpDuration = 0;

I have described most of the functions in the code

Used external models:

For the arms, I used and modified this model: https://makerworld.com/en/models/195554-dum-e-the-handy-desk-buddy-lamp-stand-holder#profileId-976539

After printing, all holes in the arms must be drilled through. Screws then pass through these holes, which can then be fastened with star nuts. The base of the arms is provided with 4x M4 heat-set nuts

As a box for the power supply, I used this model and added labeling: https://makerworld.com/en/models/435537-box-100x150#profileId-340597

Disclaimer: I am not liable for the electrical assembly. Everyone is responsible for themselves!