HKD Solar Cell DC Motor 45V 20m for Robotics and Electronics Projects

Key specifications and what they mean

Typical specifications for the HKD 45V 20m motor vary by batch, so always check the product page or datasheet. Below is a representative comparison to help choose the right motor for your project.

Why makers and students choose this motor

• Good for demonstrating solar-to-mechanical energy conversion using small solar panels.
• Compact and affordable for classroom kits and hobby robots that require low torque at high speed.
• Widely compatible with basic motor drivers, H-bridges and simple PWM speed control circuits.

Local selection tips (South Africa)

When sourcing this motor in South Africa, consider stock and lead times at Communica's Samrand or Cape Town branches. Expect a typical unit cost range of ZAR 40-ZAR 150 depending on supplier and volume; these figures are estimates and subject to stock and import variations. For education or bulk purchases, ask about VAT invoices and branch collection to streamline procurement for schools and labs.

Selecting and using the motor in robotics projects

Match the motor to your robot's load and drive geometry. Use basic calculations to estimate required torque and current. For simple wheel-drive robots:

Quick calculation: wheel torque

Torque (Nm) = Force (N) x Wheel radius (m). If a 200 g robot needs to overcome 0.5 N of rolling resistance and you use a 0.03 m radius wheel, required torque = 0.5 x 0.03 = 0.015 Nm. Select a motor and gearbox that deliver this torque plus margin.

Wiring and driver recommendations

• Use a suitable motor driver or H-bridge that can handle stall current safely. For small brushed motors, drivers rated for several amps with PWM input are common.
• Include a flyback diode or snubber network if using simple transistor drivers to protect control electronics from back-EMF.
• Consider a current-limited bench supply or a series resistor when testing at higher voltages; measure no-load and loaded currents before permanent installation.

Compatibility and accessories

Common accessories that pair well with the HKD motor include small pinion gears, micro gearboxes, shaft couplers, motor mounts and wheels. Communica stocks related categories such as Robotics & Prototyping, Connectors, and Tools & Supplies for mounting and wiring. If you need encoder feedback, check for motor variants with integrated encoders or pair with an external encoder module.

Sample project ideas

• Solar car demo: pair the motor with a small 6-18V solar panel array and a geared wheel drive to show energy conversion under sunlight.
• Line follower robot: use two HKD motors with PWM speed control and a simple H-bridge driver for a low-cost robot chassis.
• Teaching lab: demonstrate stall current, torque vs speed, and the effect of supply voltage on motor behaviour using a bench PSU (showing ZAR cost estimates for lab equipment where relevant).

Ordering, stock & technical support

Check Communica's product pages and branch stock listings to confirm availability. For technical questions about sizing, drivers or classroom bundles, request a quote that includes VAT invoice options for institutional buyers. Typical single-unit pricing is modest (see local estimate earlier); bulk orders and educational packs may reduce per-unit cost depending on stock and supplier terms.

Sources

• Communica - Robotics & Prototyping category
• DC Motor Fundamentals - Wikipedia
• DC Motor Basics and Drivers - SparkFun
• Adafruit - Components & Accessories