Bored of cutting things manually?
Let's fix it.
Pick a distance on your tablet and the ruler moves there on its own — accurate to under 0.5 mm. Pair a Bosch laser meter to send measurements straight to the ruler.
Built for the Workshop
Everything you need to stop measuring by hand.
Control from Any Device
Phone, tablet, or desktop over BLE 5.3. Real-time position feedback with sub-second latency.
±0.5mm Precision
Hardware-timed stepper pulses via ESP32 RMT. No CPU jitter, no missed steps.
Bosch GLM Laser
Point, measure, and the ruler moves to that distance. No typing, no transcription errors.
Auto-Calibrate
Inductive homing sensor calibrates on power-up. Turn it on and it's ready.
Open Hardware
ESP32-S3 based, off-the-shelf parts. Full schematics and build guide included.
Upload Cut Lists
Import from a file or send by email. The ruler runs each position in sequence — no manual entry.
What You'll Need
Source these parts yourself — we provide the software and build guide.
SmartRuler Pro Software + Build Guide
Firmware, mobile & desktop app, wiring diagrams, step-by-step guide
HGR20 Linear Rail Kit
2x 2000mm rails + 4 bearing blocks
NEMA 23 Closed-Loop Stepper Kit
YS-series 2.00Nm + driver + PSU
ESP32-S3 WROOM Dev Kit + Extension Board
Dual-core, Bluetooth 5.3, 8MB flash + expansion adapter
Inductive Proximity Sensor
LJ12A3-4-Z/BX (homing sensor)
SSR-25 DA Relay
Solid state relay for motor power
Jumper Wires
Male-to-male breadboard wires
HTD 5M Open Timing Belt
5M pitch open belt for stepper-to-carriage drive
NEMA 23 Mounting Bracket
Aluminum stepper motor mount bracket
Electrical Enclosure Box
Waterproof distribution box to house electronics
Android Tablet or Desktop PC
Android device or PC/Mac with Bluetooth Low Energy
Bosch GLM 50-27 CG Laser Measure
Bluetooth connected laser meter for auto-measure
Start Building Today
One-time purchase per device. Lifetime access.
- ESP32-S3 firmware binary
- Mobile & desktop application
- Step-by-step build guide
- Full wiring diagrams & schematics