Things used in this project

Hardware components:
Rechargeable 3.7V Battery 18650
On semiconductor lm317tg
Linear Regulator with Adjustable Output
Resistor 120 ohm
Resistor 470 ohm
Resistor 750 ohm
Fairchild semiconductor 1n4004. image
1N4007 – High Voltage, High Current Rated Diode
Panasonic eca1hm2r2
Capacitor 10 µF
09590 01
LED (generic)
Hand tools and fabrication machines:
09507 01
Soldering iron (generic)

Custom parts and enclosures

Battery Holder
Case Top
Case Bottom
Omega Interface


Regulator Circuit
The idea here is to get 3.3V using the LM317
Screen shot 2017 02 13 at 01 ae58vqoxfx


1arovxw8 5oakbksypr
Carlos Silva
2 projects • 4 followers
Hardware and software developer.


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