Why buy controllers in Johannesburg from Communica
Get the controller you need today, not in weeks. We stock a broad range of motor drivers, microcontroller boards, programmable logic controllers (PLCs) and IoT gateways suited to hobbyists, tertiary labs, technicians and procurement teams in Gauteng. Local availability reduces lead times, enables branch pickup and makes VAT invoices and account quotes straightforward for education and business purchases.
Types of controllers we recommend
Choose by application: stepper/BLDC drivers for motion systems, motor controllers for robotics and automation, microcontroller dev boards for prototyping, and compact PLCs for shop-floor control. Below is a quick comparison to match your project needs.
| Controller Type | When to pick it | Typical accessories |
|---|---|---|
| Stepper/BLDC driver | Precise motion, CNC, 3D printers | Motor, heatsink, current-sense shunt |
| DC motor controller | Robotics, conveyors, battery vehicles | Power MOSFETs, fuse, throttle input |
| Microcontroller board | Prototyping sensors, IoT nodes | USB cable, headers, breakout boards |
| Compact PLC/logic controller | Industrial I/O, repeatable sequences | DIN-rail, relay modules, I/O expansion |
Selection criteria - what to check before you buy
- Electrical ratings: continuous current, voltage range and thermal dissipation.
- Control interface: PWM, UART, SPI, Modbus or analogue inputs - ensure compatibility with your MCU or PLC network.
- Protection features: over-current limiting, reverse polarity protection and recommended fusing.
- Physical fit: mounting, connector types and enclosure for your environment.
- Local support: stock levels, branch pickup and lead-time expectations in Johannesburg.
If you want to browse available ranges, see our shop categories at Shop by Category. For brand-focused searches use Shop by Brand.
Quick compatibility checks and a practical formula
Two fast checks: confirm the controller's maximum continuous current is above your motor's stall current, and verify the supply voltage margin (controller Vmax > motor nominal voltage by at least 10%). Use Ohm's law and power calculations when sizing supply and fuses:
V = I × R - to estimate current draw from measured resistance. Power (P) = V × I - to estimate dissipation on MOSFETs or shunts.
Example: a 24 V motor drawing 6 A continuous requires a controller rated for >6 A continuous and a supply rated for at least 24 V × 6 A = 144 W, plus margin for startup currents.
For local pickup or branch questions, check our branch locations and hours: Branches & Trading Hours. If you're new to Communica, read about our history and service model on the About Us page.
