I was fortunate to get one of these FET board v2 kits from @TomKeddie recently, but now that I’ve built it I don’t know how to use it! Could anyone who attended this workshop last June help me out?
I put all twelve channels on and am using it with an Arduino Uno. Which Arduino pins correspond to which output channels?
I would like to backfeed power to the Arduino from the board. I think I need to bridge the VIN-ENABLE pads. What about the 5V-ENABLE pads and the three VIN 5V pads?
Of the three screw terminals, one has a nice big (+) beside it. I assume both the other two are negative?
I still have the handouts Tom gave out for the board; here’s what it has to say (somewhat summarized):
For the VIN connector, + is VIN, centre pin is ground, and the far pin is 5V.
There are a number of solder jumpers on this board to provide for flexibility. The VIN-Enable and 5V-ENABLE jumpers are for advanced use. If in doubt, do not connect them.
Arduino:
Connect an external supply to VIN (eg 12V) and GND only, do not connect to 5V if 5V-ENABLE is set.
VIN-ENABLE: Enable power to the attached Arduino from the VIN connector + terminal (12V max).
5V-ENABLE: Enable 5V to FET board from Arduino for low current use.
Raspberry Pi:
Connect an external supply to VIN and optionally 5V if 5V-ENABLE is set.
VIN-ENABLE: Unused
5V-ENABLE: Enable 5V to Raspberry Pi from VIN connector, no protection. Use with care.
Underside Solder Jumpers:
There are 8 solder jumpers on the underside for advanced use. They are configured for outputs to create a 12 channel output only board. Reversing ALL the solder jumpers and omitting Q9-Q12 will allow JP9-JP12 to be used as opto isolated inputs. You will also need to join the pads for pins 2 and 4 in place of Q9-Q12.
These features are untested, use with care and read the schematic first.
