Page 180 - Making PIC Microcontroller Instruments and Controllers

fryWl A sotid state retay. (These sotid
state relays provide the easjest way 10 connecl lo
higher voltages. Note LED.)

If you are going to rxn a motor or oiher inductive load, make sure the unit has suit-
able supprcssors built into it or pmvide for the suppression of the transients yourself.
You can also isolate the PIC from the Ioad by using a solid state rclay to control an
apprcpriately sized mechanical relay, which in tum contols the motor. This schemo
would not be suitable for loads that were to be cycled more than one or two times a
minute. You will bum the relay contacts out if they are not overly oversized.