Photos on John Hu

Home bench setup

Mon, 12 Oct 2026 00:00:00 +0000

Current home bench: Digilent logic analyzer, Analog Discovery (1st edition), PPS, analog ICs, ESPs, and various microcontrollers.

SCARA robot arm

Sun, 11 Oct 2026 00:00:00 +0000

Small-scale SCARA robot arm with a 5:1 reduction. Shoulder on a NEMA 17 + GT2 belt, Z on a lead screw, arm on a pancake NEMA 17, Arduino Uno + CNC shield.

Miniature cycloidal drive

Sat, 10 Oct 2026 00:00:00 +0000

CAD for a small-scale cycloidal drive modeled in Fusion 360, meant to be printed in PLA with AliExpress ball bearings.

SCARA CAD

Sun, 20 Sep 2026 00:00:00 +0000

Fusion 360 model of the SCARA arm (v0).

SCARA section view

Fri, 18 Sep 2026 00:00:00 +0000

Section view of the SCARA CAD, showing the reduction and joint stackup.

SCARA notes

Tue, 15 Sep 2026 00:00:00 +0000

Paper sketches for the SCARA arm before CAD.