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Biped building plan
autonomous version
This is a photo series of the building steps of a simple biped.
● Collecting materials see BOM● Cutting feet and baseplate● Cutting and milling legs● Constructing legs and feet and baseplate● Testing the servomotors on bare biped version● Adding Battery, power supply and on/off switch● Adding Egel kit controller● Connect all the wires● Adding Ultrasonic sensor, speaker and Bluetooth module● Connect for the first time and upload of software● Test and adjust walk routines
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-- Biped material list --
- Material feet (3mm Plywood or 1,5mm alu, FR4 epoxy board)- Material base plate (3mm Plywood or 1,5mm alu, FR4 epoxy board)- Egel kit with shield- 4x standard servo (HS-300/HS-311, Towerpro 996 or similar)- Switched power supply 3 Amp. 5 Volt LM2596 (LM2596S DC-DC)- Bluetooth module HC06 (HC-06 Bluetooth serial module)- HC-SR04 ultrasone sensor (see links)- Beeper or small high impedance speaker (see links)- Alu strip 2x 80mmx10mmx2mm flat- Switch 3 Amp. ( MTS-102 SPDT )- 3x 15 mm column spacer m2- 4x 10mm column spacer m3- 4x 27mm column spacer m3- 50mmx40mmx5mm of styrofoam- Some wired, solder & connectors- A few M3 bolts, nuts and small metal screws- 6 cm double-sided sticky tape- LiPo accu 7,4V - 900mAh (Lion power 7.4V 900MAH 25C 2s lipo)- Lipo under voltage protection (See schematic)- LiPo charger! (ImaxRC B3 Pro Compact, Balance Charger)
Drawings of feet and base plate
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Marking the parts
Base plate and leg markings
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Connecting servo's the feet and legs
Leg construction overview
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Biped test wiring
Connect the servo motors to a Launchpad or Egel kit.
● P1.4 to servo-0● P1.5 to servo-1● P1.6 to servo-2● P1.7 to servo-3
Load the E101a Walking biped software. And type: BIPED-ONWhen all is ok the feet are straigt forward and horizontal.Then type: HELLO The robot then waves with one foot.Walking can be tested by typing: 4 WALK
If this is not happening check all the connections.Otherwise carry on with the building of the biped.
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Placing the accu, power supply and Li-Po safe
Schematics Li-Po safe
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Schematics biped
Biped servo numbering from backside
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Overview main parts of biped
As seen from the right side of the biped
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Overview main parts of biped
As seen from the left side of the biped
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Overview main parts of biped
As seen from the backside of the biped