SPIKE on 2004 EDU RC help

[jerry w]

Originally Posted by ruddy

I'm trying to attatch a spike onto my 04 edu RC and I got these directions from IFI.

" You must wire two digital outputs and one ground line from the 2004 EDU RC to the Spike's input connector."

How exactly is that done? Am I just using one pwm slot? Heres my sources:
http://www.ifirobotics.com/forum/viewtopic.php?t=56
http://www.ifirobotics.com/docs/spik...uide-sep05.pdf

Thanks in advance

the spike contains two parts. sometimes you are only using one part of this device. if so, then only a 2-wire cable is needed. the black and white wire on this cable will connect between the spike and a digital output on the EDU. this will allow you to switch the REV side of the spike.
if you connect a 3-wire cable to one digital output, this will force the FWD side of the spike to the on-state. the REV side will still be controlled.
this is the simplest connection. to control both sides, you need to construct a custom cable. now we get complex.
two connectors on the EDU must be spliced according to the IFI document into a single connector on the spike.
so can you get by with half of a spike?

jerry w

[ruddy]

Originally Posted by jerry w

the spike contains two parts. sometimes you are only using one part of this device. if so, then only a 2-wire cable is needed. the black and white wire on this cable will connect between the spike and a digital output on the EDU. this will allow you to switch the REV side of the spike.
if you connect a 3-wire cable to one digital output, this will force the FWD side of the spike to the on-state. the REV side will still be controlled.
this is the simplest connection. to control both sides, you need to construct a custom cable. now we get complex.
two connectors on the EDU must be spliced according to the IFI document into a single connector on the spike.
so can you get by with half of a spike?

jerry w

I just want it to simply light up a light bulb or something like that. I'm programming it and I'm not the best electrician. How would I wire it for that situation?

[jerry w]

Originally Posted by ruddy

I just want it to simply light up a light bulb or something like that. I'm programming it and I'm not the best electrician. How would I wire it for that situation?

Ok
1. simply hook up a 3-wire from a digital output to the spike.
2. supply 12 volts battery to the inputs of the spike.
3. Wire one side of the 12-volt light to the negative side of the battery.
4. wire the other side of the light to the M- terminal on the spike.
5. changing the digital output with software should make the light turn off and on.

(It might be the M+ terminal in step-4. I always seem to get a 50-50 decision wrong!)

Jerry w