Mold King® Remote Control - Potentiometer Upgrade
- langemat
- Jul 3
- 2 min read
This modification is carried out on a proportional 4-channel remote control by Mold King®, which is typically supplied with the Powered Module M-0006 4.0 (Battery Box). It has not been tested whether this modification also works with the 6-channel remote control for the Powered Module M-0019 6.0.
I primarily build model trains made of Lego® parts (Link: https://rebrickable.com/users/langemat/mocs/), motorize them, and operate them mainly at exhibitions. One major advantage of the proportional remote control is that I can control the speed of my trains almost seamlessly. However, a significant drawback is that I have to constantly hold the joystick while driving, as it automatically returns to the centre position when released. I was therefore looking for a solution that would allow me to maintain a set speed without having to continually operate the joystick. A rotary control, like those found on traditional model railway transformers, seemed like the ideal solution - in other words, a rotary potentiometer instead of a joystick.
I undertook this modification to suit my own models perfectly. I need one control for driving (forward and reverse) and two additional controls for direction-dependent lighting on two separate channels (one channel controls the lights when driving forward, the other controls the lights when reversing). Thus, the 4-channel remote becomes a 3-channel remote. I also chose rotary potentiometers for the lights so I can adjust their brightness. Anyone who doesn't need lighting controls can simply omit them during the modification and either retain the original joystick or install a second throttle control.
The modification process clearly illustrates the principle and how it works, making it easy to adapt to individual requirements.
Disclaimer:
The materials and tools listed in the instruction are the ones I used personally and know to be functional for this conversion. Any sources mentioned are suggestions only - there's no requirement to purchase from them. Of course, alternative materials and tools can be used to carry out the conversion.
The modification is done at your own risk. I accept no liability for damage or injury. Please work carefully and responsibly.
Instruction file download (free):
Link to all of my train MOCs on Rebrickable:
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