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.
best things begin with components you allready have
the whole thing was designed in SketchUp
the parts were printed on mu old FLSun Delta Mini
motor switch and led
battery and charger circuit
both glued in with double sided tape
ready to roll
led is mounted in the front
switch is held in by the chimney
fasten the hud
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.