Is it possible to use the digital output on an ADC-11 as a current sink? I would like to control a relay with the digital output. First I tried connectng the low side of the relay to ground and the other to the digital output so that when the output was high the relay activated. This didn't work, which I assumed was because the Picologger can't supply enough current for the relay..
After this I tried connecting a 3 volt power supply to the high side of the relay and the digital output to the low side so that when the digital output was low the relay activated. This worked but I am concerned I might damage the Picologger. The current is <5 mA. Any advice would be great,