I read through some threads but I´m still not sure how to finish my project. First of all I need to say that I´m a noob and I just started working with arduino uno.
I´d like to control 15 different channels with the arduino uno http://www.arduino.org/products/boards/arduino-uno
Some people said I better use 2x 8 channel relay module like http://www.sainsmart.com/8-channel-dc-5v-relay-module-for-arduino-pic-arm-dsp-avr-msp430-ttl-logic.html
and some talked about the 16 channel module http://www.sainsmart.com/relay-1/relays/16-channel-12v-relay-module-for-pic-arm-avr-dsp-arduino-msp430-ttl-logic.html
Are there any advantages or disadvantages? Do I need to change the analog inputs to outputs at both relay modules? Or is there any other way to solve it?
I hope someone can help me here.