2019 Motorised Engine
We loved playing with the wooden train tracks. It is like a puzzle with a hundred solutions.
One thing we were missing though was an train engin that could run around by itself.
I could not find any so I made one.
Motor: DC3V-6V DC Gear T-Motor
Battery: 3.7V lithium polymer 061730 601730 280mAh
Charger: Micro USB 5V 1A 18650 TP4056 Lithium Battery Charger Module With Protection
Switch: MTS-102 3-pin Toggle Switch
LED: 3mm 2-3V White LED
(AliExpress links are examples)
Afterthought: A resistor of around 60ohm in series with the white LED to reduce 3.7V from the battery should have been used.
The value of the resistor might vary a bit, depending on the LED used.