Electronics for hombrew

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Nick Lewty

Talk given at hackerspace Singapore 2015 about the use of electronics in homebrewing.

Technology

Electronic control for your homebrew
Nick Lewty
BEER CAN LAH
October 21st 2015

Basic brew equipment needed
Fermentor, boil kettle and chiller

Our current brew equipment
Fermentor fridge

Extra brew equipment
Kegerator and grain mill

What can be hacked
Mashing
Convert starch into sugar
Keep grains at target temperature (warm) Hacked
Boil to add hops
Cool down from 100 to 20 degrees
Fermenting
Convert sugar into alcohol
Keep pre beer at target temperature (cold) Hacked
Put in kegs and drink

Mash electronics
Thermistor to sense temperature
Relay to switch
Power to heater (mains!)
Microcontroller in charge (Arduino)

Temperature stabilization
Read in analog voltage
Look up temperature
PID calculates duty cycle
Update duty cycle

Arduino
PID library for closed loop control
Simple serial communication
Status up date
Pump on / off
...
Python control GUI

Circuit diagram 2
Our attempt at making everything more compact

Python control GUI
Written using PyQT, can be extended to Andriod
and IOS with Kivy

Other uses
Sous-vide
Water bath biology
Onsen egg
Warm up baby milk

Fermentation
Temperature control:
Ales ferment at ≈ 20◦
Lagers ferment at ≈ 9◦
Singapore is ≈ 30◦

Good fermentation
Good fermentation is important

Temperature Control
Temperature control:
Similar to mash tun
Cooling instead of heating
Switch mains to fridges / freezers
Does not kill compressors
No PID control just conditional functions

How to start brewing
Brooklyn brew kit (Amazon) or Beginners kit
(iBrew or Homebrew)

Singapore Homebrew Club
http://www.meetup.com/Singapore-Homebrew/

Singapore Craft Beer week 24th-31st of October
http://www.singaporecraftbeerweek.com/

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Electronics for hombrew

1. Electronic control for your homebrew Nick Lewty BEER CAN LAH October 21st 2015

2. Homebrewing Homebrewing is not tiger

3. Quick how to make beer

4. Ways to make beer Extract or All grain

5. Basic brew equipment needed Fermentor, boil kettle and chiller

6. Our current brew equipment Mashtun

7. Our current brew equipment Fermentor fridge

8. Extra brew equipment Kegerator and grain mill

9. What can be hacked Mashing Convert starch into sugar Keep grains at target temperature (warm) Hacked Boil to add hops Cool down from 100 to 20 degrees Fermenting Convert sugar into alcohol Keep pre beer at target temperature (cold) Hacked Put in kegs and drink

10. Mashing How the magic is performed

11. Mash electronics Thermistor to sense temperature Relay to switch Power to heater (mains!) Microcontroller in charge (Arduino)

12. Thermistor Voltage read in by ADC

13. Relay Relay to switch heater on and off

14. Temperature stabilization Read in analog voltage Look up temperature PID calculates duty cycle Update duty cycle

15. Duty cycle

16. The brains

17. Arduino PID library for closed loop control Simple serial communication Status up date Pump on / off ... Python control GUI

18. Circuit diagram

19. Circuit diagram 2 Our attempt at making everything more compact

20. Python control GUI Written using PyQT, can be extended to Andriod and IOS with Kivy

21. Other uses Sous-vide Water bath biology Onsen egg Warm up baby milk

22. Fermenting Keeping it cool

23. Fermentation Temperature control: Ales ferment at ≈ 20◦ Lagers ferment at ≈ 9◦ Singapore is ≈ 30◦

24. Good fermentation Good fermentation is important

25. Temperature Control Temperature control: Similar to mash tun Cooling instead of heating Switch mains to fridges / freezers Does not kill compressors No PID control just conditional functions

26. Temperature controller

27. Github https://github.com/beercanlah

28. Excited to start brewing

29. How to start brewing Brooklyn brew kit (Amazon) or Beginners kit (iBrew or Homebrew)

30. Singapore Homebrew Club http://www.meetup.com/Singapore-Homebrew/

31. Singapore Craft Beer week 24th-31st of October http://www.singaporecraftbeerweek.com/

32. Visit our blog www.beercanlah.com

33. CHEERS