Bill of Materials

This directory contains the bill of materials for the hardware design of the Rotary Pendulum.

Electronics 

Microcontroller 

Part Number	Description	Quantity	Price	Details
ESP32-DevKit	ESP32 Development Board	1	~€10.00	EspSchematics

Motor Driver 

Part Number	Description	Quantity	Price	Details
A4988	Stepper Motor Driver	1	~€3.00	DriverSchematics

Power Supply 

The motor is powered using a 12V power supply. The ESP32 and other components are powered using a 5V power supply. The 5V power supply is generated using a step-down voltage regulator.

Part Number	Description	Quantity	Price	Details
LM7805	5V Voltage Regulator	1	~€0.50

Sensors 

Encoder

An incremental rotary encoder is used to measure the bar angle. The encoder has 600 pulses per revolution and it is powered using 5V.

Part Number	Description	Quantity	Price	Details
Rotary Encoder	600 P/R Incremental Encoder	1	~€20.00	RotaryDatasheet

Hall Effect Sensor

Part Number	Description	Quantity	Price	Details
KY-024	Linear Hall Effect Sensor	1	~€1.00	HallDatasheet

Mechanics 

Frame 

The frame is made out of an alluminium profile with a cross section of 20x20mm. The length of the profile is around 180mm.

You can use any other material with a different cross section, but make sure that the dimensions are compatible with the design and it is strong enough to sustain the stresses.

Part Number	Description	Quantity	Price	Details
20x20mm Alluminium	20x20mm Alluminium Profile	1	~€2.00	3D Model Profile

3D Printed Parts

You can find the 3D models of the parts in the 3D models section. The parts were printed using PLA but you can use any other material (try avoiding rubber 😜).

I have also posted the models on Thingiverse and Cults3D:

Motor 

Part Number	Description	Quantity	Price	Details
NEMA 17 Stepper Motor	17HS08-1004S	1	~€10.00	MotorDatasheet