Power supply for a homemade mini drill from a tablet charger

I assembled a mini dremel, an engine from some kind of electronics, I don’t remember ... it works in the range of 9 -12 volts.

The nozzle from the rod from the ballpoint pen, a circle from the disc of the grinder.


I was powered by LBP, which is not very convenient, to carry a stationary power supply unit.
I decided to make a tablet out of the memory.

Output: 5 Volts, 2 Amps.
I changed all the capacitors to more powerful ones,
replaced F1 (safety resistor).
Voltage output

If the voltage is increased, then the current should drop ... We check by connecting a car bulb
12 Volt 55 Watt

24 Volts 90 Watts

For 10 Volts it is normal. Now you can connect to the RFV-1-02 engine speed regulator, from a tape recorder, and you get an adjustable, mini PSU for 2 amperes.

We connect our device

Everything works great.
But the best option on three 18650 batteries, put in your pocket and get around!
Of course, protection against discharge, (Charge), do not forget to do the battery.