OttoBock 757B8 replacement battery and charger

thingiverse

This is an OttoBock 757B8 replacement battery for a myoelectric prosthetic hand. I used two 16340 batteries (3.7 V 2.4 Ah) and the conectors of a broken protoboard. The charger was designed by Raul Espejel-Paz . Overview and Background Lesson Plan and Activity Materials Needed Charger PCB For the Replacement Battery: 2 x 16340 batteries (3.7 V 2.4 Ah) 2 x conectors of a broken protoboard (see photos). 1 x 3D printed box and lid. For the Two-Cell Charger: 1 x IC LP2951 Adjustable Voltage Regulator 1 x 10 Ohm resistor 1 x 2.2 M Ohm resistor 1 x 220 k Ohm resistor 1 x 22 k Ohm resistor 1 x 20 k Ohm preset resistor 1 x 10 microF, 25 V electrolytic capacitor 1 x 4.7 microF capacitor 1 x 0.002 microF capacitor 2 x 1n4007 diode 1 x Red basic LED 1 x 12V DC 500ma Power supply