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Step 5Prepare Power Supply
I had an old Motorola cell phone charger with a similar (slightly) higher voltage.
Cut the cell phone connector end off, and strip back about 3/8" of the insulation to expose the copper wire.
Carefully separate the stripped ends and plug the charger into the wall. Using your multimeter, touch the red lead of your meter to one wire, and the black lead of the meter to the other wire. If the meter displays the correct voltage of the power supply (say 5.0 volts), then mark the wire the red probe is touching as the positive wire. I used masking tape to do this. If your meter says (-5.0 volts), then the wire the black lead is touching is the positive lead. Mark it as such.
You will need to figure out how to run the power supply wires through the plastic housing of the swing in order to connect them to the switch. I chose to drill a hole on the bottom of the swing, near the battery box. Drill a hole just large enough to fit the wires through. The tie a simple knot (overhand) in the power supply wiring on the inside of the housing to provide strain relief for the wiring. You DO NOT want the solder joint to be pulled on when someone trips over the wiring, etc.
Cut the cell phone connector end off, and strip back about 3/8" of the insulation to expose the copper wire.
Carefully separate the stripped ends and plug the charger into the wall. Using your multimeter, touch the red lead of your meter to one wire, and the black lead of the meter to the other wire. If the meter displays the correct voltage of the power supply (say 5.0 volts), then mark the wire the red probe is touching as the positive wire. I used masking tape to do this. If your meter says (-5.0 volts), then the wire the black lead is touching is the positive lead. Mark it as such.
You will need to figure out how to run the power supply wires through the plastic housing of the swing in order to connect them to the switch. I chose to drill a hole on the bottom of the swing, near the battery box. Drill a hole just large enough to fit the wires through. The tie a simple knot (overhand) in the power supply wiring on the inside of the housing to provide strain relief for the wiring. You DO NOT want the solder joint to be pulled on when someone trips over the wiring, etc.
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One thing didn't seem to work out for me - it doesn't appear to be rocking. Manually, it freely moves and continues rocking, but for some reason it's not working via the controls.
Lights and music work fine.
Good luck!
If you have a multimeter, you could measure the voltage going to the swing and see if you are getting a big voltage drop (which could be causing the symptom of music skipping)