I've recently come into possession of a bunch of dacta 9V motors, cables, battery boxes and a few sensors and I'd really like to use them with my PF and NXT stuff.

Does anyone know how to wire up Power function-9V and NXT-9V converter cables? I've got a few damaged cables and would rather make use of them than buy some

Also does anyone know if the rotation sensor can be used with the NXT?

The standard PF extension lead is all you need to use the motors with PF and the 9V contacts connect to the inner pair of  PF contacts.

these should help:

 from http://www.josepino.com/robots/hacking_lego_nxt

 

9V to PF is straight-forward just connect C2&9V to one wire and C1&0V to the other (using such a setup in a PP3 [standard 9V block] adapter myself)

Edited March 5, 20195 yr by syclone

Thankyou those will help

On 3/5/2019 at 5:11 PM, That_LEGO_Guy said:

Also does anyone know if the rotation sensor can be used with the NXT?

I've seen them used here, so there must be a way of using them.

On 3/5/2019 at 7:11 PM, That_LEGO_Guy said:

Also does anyone know if the rotation sensor can be used with the NXT?

I'm no expert, but I would imagine that 9v is supplied to the rotary sensor, and there's a resistor inside, that is shunted by every 8 rotations (as it's old tech). This causes the 9v to drop. 

If I had one, I would test it for you, but try putting it on a converter cable and plug it into the sensor port of the NXT. Put a push button block in the program, and count the number of pushes for 1 rotation.

It is old tech, but it is not that straight forward (as the RCX knows when it rotates clockwise or counterclockwise): See Philo's detailed information on the sensor.

Best,
Thorsten

Look at the connection diagram in this link. You need resistors between the sensor outputs or something
https://bricks.stackexchange.com/questions/2325/how-to-use-power-functions-with-mindstorms-ev3