Step 5: Readying the Relay
For this step you will need:
-Two (2) power inverters
-One (1) Relay
-Two (2) 9V snap connectors
The following link is has the specifications for the relay we used and suggest you use:
NOTE: For EVERY connection made in this step it will be expected that you slip heatshrink onto one of the wires prior to soldering, and then proceed to cover the connection with the heatshrink after soldering.
Solder a lead wire onto each of the pins extruding from the relay.
TIP: Take the lead that you are going to solder to a pin on the relay and wrap it tightly around the solder you are using so it makes a sort of coil. Then pull the solder out and, without undoing the coil, slip the lead onto the relay pin. Since the relay pin is fairly inflexible and is also similar in size to the solder the coil should fit snugly around the relay pin, keeping it steady for you to solder a good connection.
Solder the Positive DC Load pin of the relay to two positive wires of your 9V snap connectors.
NOTE: In this step you will be soldering three (3) wires together: the lead coming from the relay, and the two positive leads coming from the snap connectors.
Next, solder the negative DC Load pin of the relay to the two positive wire from both of the power inverters. NOTE: In this step you once again will be soldering three (3) wires together: the lead coming from the relay, and the two positive leads coming from the power inverters.
Next, solder a short (two (2) inches or so) piece of 22 gauge solid wire to the end of the POSITIVE DC Control pin lead wire of the relay. Leave this wire aside, you will connect this wire in a later step.