Kartik Pawar

Spider bot - Dev Log
Date: 7 Sep 2025

Progress :-
- Programmed basic walking movements.(partially)
- Noticed some leg sync issues but motion was close to a gait.

Setback :-
- Accidentally damaged the controller board while soldering.(yea i'm bad at it)
- Couldn't complete making corrections in movements.

Next Steps :-
- Replace the board.(Probably in 5 days)
- Fix servo mapping.
- Work on smoother gaits.

Reflection - Learned about leg synchronization and careful hardware handling.(and maybe time to learn soldering properly)

Spider Bot – Dev Log (Day 1)

Date: 1 Sep 2025
Focus: Assembly + Wiring + Servo Test

Done Today :-
- Gathered parts: Arduino Nano, PCA9685, 8 servos, frame, 6V PSU.
- Wired Arduino --> PCA9685 (A4-SDA, A5-SCL, 5V-VCC, GND-GND).
- Connected 5V supply to PCA9685 V+ rail, common ground set.
- Plugged servos into channels 0–7 (hips & knees).
- Uploaded test code --> set all servos to 90°.
- Adjusted servo horns for neutral “X” stance.

Notes :-
- PCA9685 detected fine at 0x40.
- Small jitter at power-up --> fixed with delay in setup().
- Needed slight re-positioning of knee horns.

Next :-
- Add capacitor for smoother power.
- Write simple stand + step motion code.
- Test first walking gait.