Mara X Shot Timer

An arduino based shot timer for the Lelit Mara X prosumer espressor machine.

Existing projects

1. https://github.com/SaibotFlow/marax-monitor
   1. (Fork) https://github.com/DiSanzes/Mara-X2-ShotTimer
      1. (Fork) https://github.com/snafuz/MaraXDisplay

Materials

• Board
• Display
• Voltage regulator

Power supply

Pins

• 1 - VCC (12V)
• 2 - GND
• 3 - Receive (RX)
• 4 - Transmit (TX)

USB

9V block battery

Switch

Button

Power on opener Transistor is letting energy flow define output pin digital after 120 000 seconds signal 1 on output pin power off

Circuit

https://forum.arduino.cc/t/vorstellung-und-erste-fragen-zur-selbstabschaltung-transistorschaltung/362576/16

From Mara X with voltage regulator

Circuit

https://www.circuits-diy.com/12v-to-9v-converter-circuit-using-lm7809-regulator-ic/

Buy

https://www.ebay.de/itm/375340664282