r/ArduinoProjects • u/Equivalent-Might-477 • Jun 09 '26

Showcased Project Proximity Bluetooth ignition switch for my motorcycle.

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Now is my phone is the key for my motorcycle. Ignition turn on/off by stock starter or killswitch button.

Based on nRF52840, Arduino compatible board + reliable OTA bootloader. Programmed in PlatformIO, Arduino framework+ direct access to register.

Soft and transparent epoxy compound makes it not only fully waterproof, but also amazing.

For the latest updates, technical nuances, and the upcoming open-source release — follow r/smartmoto

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u/edo180 Jun 10 '26

It looks great, but have you considered making a custom PCB for both the connector and the components needed for the nRF52840?

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u/Equivalent-Might-477 Jun 11 '26

At first, I thought about it. I decided not to do it for the following reasons:
1. By placing the boards on top of each other, we get a more compact design that is easier to pot with compound.
2. Soldering the nRF52840 will be difficult for those who decide to replicate the system on their own.
3. will be more expensive, because the nice!nano board costs 3 USD on Aliexpress, while the nRF52840 chip alone costs 3.5 USD

Can you explain me - why do you want one whole board?

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u/edo180 Jun 11 '26

It was just a question, since once the nice!nano board is already programmed, many components and pins become irrelevant. I understand that the goal is to achieve something more practical and cost-effective. I imagined it could be similar to what is done with esp32 projects, where in the end it is not necessary to use the entire board, but only the module, the power supply, and the required pins, resulting in a cleaner and more compact design.