Could three component connect the same pin(Ground)

Forum 2005-2010 (read only) Hardware Interfacing
1

hello

Could three components be connected to the same pin(Ground) on the Arduino Duemilanove ATmega 168 ?

Thanks

2

Hi,

i do not really understand your question. You can connect a lot of sensors or actuator to the same GND pin, as long as the maximum current through this pin is not excessive (depends on the max. current, the power supply of your arduino can deliver and the size of the conduction path of the PCB. You cannot put more than 1 sensor to an input at the same time. You can put more than one actuator to an output pin as long as the arduino can drive this current (normally 20mA/pin - some people say 40mA, but this is only true under some special conditions).

Mike