In this post I will share with you the improvements I've made to our biomass/Solar mixed system , which is basically to change the obsolete control system for thermostats with a centralized system based on Arduino fully customizable, flexible and expandable; we will see the assembly, components and source code.
Applied materials:
1 - Arduino MEGA 2560 (specifically I used a Funduino clone ), because the TFT shield does not leave me enough inputs / outputs Free UNO R3.
2 - Touch Screen TFT 2.4 " McuFriend , which will give us great freedom when it comes to display information on screen libraries that have worked best for me. Are the BUHOSOFT ; here you can download the version I used.
3 - relays to activate solenoid valves, with a fed to 5V that can handle 230V and 10A worth us to spare.Not to stress regulator Arduino board, the food independently with other L7805 regulator (handles between 7-30V and 1.5A max). Being so low consumption, nor need a heatsink:
- A speaker-buzzer for alarm warning in case of problems, which operates between 7 and 12V 100dB, enough.
- A relay SSR DC-DC to activate the buzzer ; only consumes between 3 and 25mA so we can turn directly to the Arduino pin. I used one of solid state more than anything because I had left the other, butsince it is an element that is to be activated soon, you better go to a mechanical more economical and compact:
