MK111 VM136 alternating polarity impulse

Kits Timers and Clocks
1

Hey

I am trying to get an impulse interchanging between 12V and then after 60s an impulse of -12V.

I want to battery power the system, how would I need to wire the MK111. to get the result.

Thanks!

2

The MK111 (kit soldering required) or the VM136 (assembled) have a relay output.
This item does not output voltage but just completes or interrupts a circuit.
Unfortunately the relay is a SPDT (Single Pole Double Throw).
Since you are wanting to switch +12 volts and -12 volts you would need to need to have the relay on the MK111 /VM136 control a DPDT (Double Pole Double Throw) relay.