Hobbies And Interests
Things You'll Need
Instructions
Drill a hole in one side of the rubber or plastic box, of the same size as the female plug that is sized to fit the 24 volt power supply̵7;s male plug. Drill another in the opposite side, sized to fit the cord from the male plug which is the same type and size as that of your power supply.
Measure the resistance of the device that requires the 12 volts. Select two resistors with values of no greater than one tenth the resistance you just measured. If you use resistors with a higher value, plugging your device into the power supply will cause the voltage output to drop.
Place both of the resistors into the circuit board so one of the leads of one resistor is next to one of the leads of the other. Solder them together by touching a hot soldering iron to both of those leads at once while holding solder to them. Place the circuit board in the box.
Cut the wire from the female plug so it reaches from the larger hole in the box to the resistors. Cut the wire from the male plug so it reaches from the resistors to the smaller hole, plus at least one more foot. Strip away 1/4 inch of insulation from each of the wires on each of the plugs. Use wire strippers or the stripping attachment on wire cutters.
Solder one of the wires from the female plug to one of the free resistor leads. Solder the other wire from the female plug to the other free resistor lead.
Stick the female plug into the larger hole drilled into the side of the box. Glue it into place. Push the wires from the male plug into the smaller hole in the box. Solder one wire to the middle junction, between the two resistors. Solder the other wire to the other lead of either resistor.
Glue the wires into place at the hole in the side of the box. Glue the circuit board itself to the bottom or sides of the box. Put the lid on the box. When the glue is dry, plug your 24 volt power supply into the female plug. Plug the male plug into your device, which will now receive 12 DC volts.