Harry Potter Wand Hermione Remote Control 433MHz

This is a magical wand designed to control a lamp with a simple flick, just like in the wizarding world! The wand functions as a remote control for 433 MHz smart plugs, allowing you to switch the lamp on and off with a wave of the wand. It works on the common 433 MHz protocol, making it compatible with many wireless smart plugs. Ideal for Harry Potter fans who want to add a touch of magic to their everyday lives!

Required Parts

3D Printed Components:

• wand_hermione_part1.3mf
• wand_hermione_part2.3mf
• wand_connector.3mf
• wand_plug-in-module.3mf

Electronics:

• 1× 433 MHz wireless smart plug (Aliexpress) https://www.aliexpress.com/item/1005008284515388.html 
• 1× 433 MHz RF Wireless Transmitter Module (Aliexpress) https://www.aliexpress.com/item/1005007574184495.html
• 1× Microswitch (Aliexpress) https://www.aliexpress.com/item/1005006357859519.html 
• 2× Button cells AG5 / LR754
• approx. 12 cm of wire (0.25 mm²), preferably flexiblel

Step 1 – 3D Printing

Download the .3mf files and print all components.

Recommended print settings:

• Material: PLA
• Nozzle diameter: 0.2 mm
• Layer height: 0.08 mm
• Supports: Only if necessary (e.g. for the handle or internal structure)

Post-processing:

• Carefully remove all support structures using flush cutters or a hobby knife.
• Make sure the mating surfaces on the tip and handle are clean and smooth.
• Glue the tip of the wand to the handle using a small drop of superglue. Hold the parts in position for a few seconds until the glue sets.
• Optional: Lightly sand any rough areas with fine-grit sandpaper for a smoother finish.

Step 2 – Preparing the Electronics

Prepare the wires

• Strip approximately 2–3 mm of insulation from both ends of the red and blue wires.
• Red = positive terminal, Blue = negative terminal for power supply.
• Tin the stripped ends with solder until a small droplet forms.
• Carefully flatten the solder droplet using flat-nose or needle-nose pliers so it fits precisely into the recess of the battery holder (see photo).

Insert the batteries

• Insert two button cells (AG5 / LR754) into the designated battery holder.
• Make sure to observe correct polarity: positive (red) on top, negative (blue) on the bottom.

Route the antenna

• Guide the antenna wire of the 433 MHz module through the designated opening behind the microswitch.
• Make sure the wire is not pinched or bent, as this can affect transmission range.

Prepare the microswitch

• Carefully remove the side metal mounting tabs from the microswitch using needle-nose pliers until only the two metal contacts remain visible.
• Lightly tin both contacts to make soldering easier later.

Connect the signal wire

• Solder the black wire from the 433 MHz transmitter module to one of the two contacts on the microswitch.
• Connect the ground wire
  • Solder the blue wire (negative battery lead) to the second contact on the microswitch.
  • This wiring allows the transmitter module to be activated via the microswitch.

Step 3 – Assembly

• The completed 433 MHz electronics module is now carefully inserted into the wand's housing.
• Pay attention to the correct orientation: Two guide pins inside the housing ensure the module is positioned correctly.
• The module should snap into place or fit securely without the need for force.

Maintenance Notes:

• There is a small hole on the underside of the wand.
  Through this hole, you can carefully push out the button cells using a needle or a small screwdriver to replace them if necessary.

• To open the wand, the entire electronics module can be removed:
  Use a small screwdriver to gently pry the module out from the lower tab.
  Be careful to avoid damaging the housing during this process.

Step 4 – Pairing with the Smart Socket

Plug in the smart socket

• Ensure that it is powered on.

Put the socket into pairing mode

• Press and hold the connection button on the smart socket for about 3 seconds until the LED starts blinking (depending on the model).

Pair the wand

• Press the microswitch on the wand three times in quick succession.
• This will send the pairing signal from the 433 MHz transmitter.

Function test

• Press the switch again. The socket should now toggle (on/off).
• Depending on the socket model, the "Toggle" mode is supported (state changes with each signal).