1k at the base should do it. It will keep your base current at about 2.5mA or less but it will reduce voltage to scanner by about 0.2V. I wonder if your solid state relay needs a higher voltage to turn on fully. Other options include relay or a good logic level mosfet designed for 3.3v.
wolframore:
1k at the base should do it. It will keep your base current at about 2.5mA or less but it will reduce voltage to scanner by about 0.2V. I wonder if your solid state relay needs a higher voltage to turn on fully. Other options include relay or a good logic level mosfet designed for 3.3v.
Hello, you are right with the voltage drop does not work because I am already at the limit of 3.3 volts.
I'm trying to use the relay again.
Using the relay as a switch, should I interrupt vcc or gnd?
Thanks.