Prop-2 and a standard DC relay

[Jeff Haas]

I've searched the Basic Stamp manual and the forums, but I don't quite have a handle on this...what is the correct schematic to hook up a standard, DC relay to a Prop-2?

P. 371 of the Basic Stamp manual has a schematic as part of the RCTIME command; the upper part shows the relay connected directly to a pin and VDD; is this all that's needed?  I've seen other examples where there's a transistor, with a resistor in line, needed to drive the relay.  This is based on old Nuts & Volts articles referenced on the Parallax site, but the difference is that (I think) the Prop-2 has a few features beyond the regular Basic Stamp.

Once I have this set up correctly, I'm pretty sure I have a handle on the code...define the pin, use the constant for IsOn/IsOff and so on.

[bsnut]

The Prop-2 has ULN to handle for what you want to do. The one side of relay coil gets connected to the +V and the other side gets connected to the OUTx.

[Jeff Haas]

Thank you!  That worked perfectly.  The additional feature people asked for yesterday is working.

And a fast reply on a Sunday night, too.