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Crawl4 Used AI
A DIY 4-legged Spider Robot project controlled using Arduino + custom libraries.
Followers
GB114
Check their projects out: N-gram Models, LuminanceMeter, Gerber Viewer, Crab rave, Bouncing DVD logo, BinaryCounter, Particle Simulator
BnaJns
Check their projects out: BnaJns Portfolio, BnaJns Portfolio v2, slack.fm, readmefm, limonaad - a C++ chess engine, roblox-outfit-finder, faucet - a c++ http server, visittallinn-waffles, ralseibot
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Once you ship this you can't edit the description of the project, but you'll be able to add more devlogs and re-ship it as you add new features!
Timeline
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.
