Project idea
Build a master node with keypad and LCD to set target RPM, then transmit the speed setpoint over 2.4 GHz nRF24L01 to receiver nodes that drive BLDC motors via 30A ESCs for synchronized speed across multiple stations. Use closed‑loop speed control by reading motor RPM feedback at the master node and distributing the stable setpoint so all receivers follow identical PWM duty targets through their ESCs.
 
Project description
Each node uses an Arduino‑class MCU and an nRF24L01 transceiver; one node is the master with keypad/LCD while remaining nodes are motor receivers that map the received setpoint to ESC‑compatible PWM, keeping all BLDCs matched in speed. A2212‑1000KV BLDCs with 30A ESCs provide robust, PWM‑driven speed control at 2–3S operating range, suitable for synchronized conveyor or textile demo rigs.
 
Hardware ICs (specs)
ATmega328P (Arduino Uno R3 class MCU) for keypad/LCD, RF, and PWM timing control.
nRF24L01 2.4 GHz single‑chip transceiver for master/receiver wireless synchronization.
HD44780‑compatible 16×2 character LCD controller (typical for 16×2 modules) for speed display.
ESC internal driver stage uses MOSFET switching; the ESC interfaces to MCU PWM input for BLDC speed control.
 
Total components list (with India prices)
A2212 1000KV BLDC motor ×3
30A BLDC ESC ×3 
Arduino Uno R3 compatible ×3
nRF24L01 2.4 GHz RF module ×3 
16×2 LCD module ×1 
4×4 matrix keypad ×1 
3.3V adapter board for nRF24L01 ×3
40‑pcs female‑female Dupont cable set ×1 
Motor mounts/screws included with A2212 package (no extra cost, per package contents).
 
Total cost (INR)
Exact sum of the above sourced line items is ₹3814.50 for a 3‑motor synchronized prototype, excluding optional battery/SMPS and enclosure.
 
Features
Wireless master–receiver sync using nRF24L01, with stable 2.4 GHz links for multi‑node control.
ESC‑based PWM control for BLDC motors at 2–3S with onboard BEC, simplifying receiver node power.
Clear UI with keypad input and 16×2 LCD readout for setpoint entry and status display.
 
Applications
Educational demo of synchronized conveyors and textile rollers using multiple small BLDC drives.
Multi‑station speed matching in prototype lines where wireless distribution of setpoints is preferred.
 
Project Includes:
Fully assembled and tested circuit
Circuit diagram
Source code 
(For DIY KITs - only the components will be provided)
 
Project Types:
DIY KIT(Do IT YourSelf KIT) - We are providing only components in this kit for this project
DIY KIT with Code & Circuit Connections - Along with the components, you will get the Code and the Circuit Connections file to help you build the project easily.
Readymade Breadboard - We are providing fully assembled, tested and ready-made project using plug-n-play jumper wires and breadboard with all the other components, code & circuit diagram.
Readymade Soldered - We are providing fully assembled, tested and ready-made project soldered on a PCB with all the other components, code & circuit diagram.
 
Dimensions (cm)
Estimated assembled footprint: approximately 22 × 18 × 8 cm for a compact multi‑node demo on a small enclosure with Arduino‑class boards and LCD.
Component placement is based on Uno‑sized controllers, a 16×2 LCD, and compact RF modules to maintain a small bench‑top layout.
 
Shipping dimensions (cm)
Suggested shipping carton: about 30 × 22 × 12 cm to accommodate motors, ESCs, cabling, and protective padding for the LCD.
This size leaves space for anti‑static pouches and bubble wrap for electronic modules and displays.
 
Weight
Estimated assembled weight: ~0.9 kg for 3 motors, 3 ESCs, 3 Uno boards, LCD, keypad, RF modules, and wiring typical for bench kits.
Heaviest items are the motors and any optional power source, while MCU, RF, keypad, and LCD add modest mass.
 
Estimated project weight
Estimated shipping weight with packaging: ~2 kg including box, foam, and protective wraps to secure motors and the LCD module.
 
Notes: All the products are made by LearnElectronics India and not for re-sale.