- Thu Feb 02, 2017 6:37 am #16358
Ummm... according to the ULN2803 data sheets, the COM should be tied to the load voltage supply, not board 5V, right? That would be bad.
TI.com wrote:When the COM pin is tied to the coil supply voltage, ULN2803A is able to drive inductive loads and supress theYou can use a ULN2803 on a v0.4.2, but it has to be jumper-wired in the proto area. I ordered 10 extra ULNs for this purpose. I have asked for an 'official' aux driver outline for the Wiki so users can build their units for outputs on the aux pins, such as my need for more than the four HC aux outs, but no solutions yet.
kick-back voltage via the internal free wheeling diodes.
-= If it was easy, everyone would do it =-