OttoBock 757B8 replacement battery and charger

thingiverse

This is a high-performance OttoBock 757B8 replacement battery designed specifically for myoelectric prosthetic hands. I've engineered this product using two advanced 16340 batteries, each boasting an impressive 3.7 V and 2.4 Ah capacity, along with connectors expertly salvaged from a broken protoboard. The charger itself was carefully crafted by renowned designer Raul Espejel-Paz. Overview and Background The goal of this project is to create a reliable replacement battery for myoelectric prosthetic hands, leveraging cutting-edge technology and innovative design principles. Lesson Plan and Activity This lesson plan focuses on the development of a high-capacity battery system for prosthetic limbs, emphasizing the importance of precision engineering and effective problem-solving strategies. Materials Needed: Charger PCB For the Replacement Battery: 2 x 16340 batteries (3.7 V 2.4 Ah) 2 x connectors from 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