--- product_id: 782808749 title: "[Generic Product] 12V-40V 10A PWM DC Motor Speed Controller Knob" brand: "riorand" price: "9 zł" currency: PLN in_stock: false url: https://www.desertcart.pl/products/782808749-generic-product-12v-40v-10a-pwm-dc-motor-speed-controller store_origin: PL region: Poland --- # [Generic Product] 12V-40V 10A PWM DC Motor Speed Controller Knob **Brand:** riorand **Price:** 9 zł **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** [Generic Product] 12V-40V 10A PWM DC Motor Speed Controller Knob by riorand - **How much does it cost?** 9 zł with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/782808749-generic-product-12v-40v-10a-pwm-dc-motor-speed-controller) ## Best For - riorand enthusiasts ## Why This Product - Trusted riorand brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description ## Technical Specifications | Specification | Value | |---------------|-------| | UPC | 645195917568 619636102455 | | Global Trade Identification Number | 00645195917568 | | Manufacturer | yakool | | Part number | RRPDMSCSGSPC | | Item Weight | 59 g | | Product Dimensions | 5.99 x 5 x 3 cm; 59 g | | Is Discontinued By Manufacturer | No | | Wattage | 120 W | | Horsepower | 400 Watts | | Noise Level | 1 Decibels | | Batteries Included | No | | Batteries Required? | No | | Item Dimensions LxWxH | 6 x 5 x 3 cm | ## Product Details - **Color:** 2V-40V-10A-400W - **Brand:** RioRand - **Voltage:** 12 Volts - **Material:** Plastic Metal - **Item Weight:** 59 Grams ## Images ![[Generic Product] 12V-40V 10A PWM DC Motor Speed Controller Knob - Image 1](https://m.media-amazon.com/images/I/718ncGYNzZL.jpg) ![[Generic Product] 12V-40V 10A PWM DC Motor Speed Controller Knob - Image 2](https://m.media-amazon.com/images/I/71tYD49UzFL.jpg) ![[Generic Product] 12V-40V 10A PWM DC Motor Speed Controller Knob - Image 3](https://m.media-amazon.com/images/I/71EN2Csq45L.jpg) ![[Generic Product] 12V-40V 10A PWM DC Motor Speed Controller Knob - Image 4](https://m.media-amazon.com/images/I/71geZBc9tbL.jpg) ![[Generic Product] 12V-40V 10A PWM DC Motor Speed Controller Knob - Image 5](https://m.media-amazon.com/images/I/618ivwE7+pL.jpg) ## Questions & Answers **Q: is there any on/off switch in this?** A: there is not on/off switch **Q: I have a Battery is UB1250 12VDC 5Ah and connect to Fan that is 12DC 3.90A, is your item does the same application as Rheostat? if this is Not the right One? which one you recommend please I look forward to your reply.** A: It is similar in function to a rheostat, however, it does not waste energy by dropping the current across a resistor. This devise uses Pulse Width Modulation. If you are not familiar with this function, it basically chops the voltage in order to regulate the current output. You will be able to control the fan speed, without loosing current through a resistor in a rheostat and wasting your battery. I use it to control 12 and 24 volt wiper motors for animatronic devices. I use power supplies instead of batteries and have digital meters for output voltage, current, and motor rpm feedback by attaching a 10 tooth sprocket to the motor shaft and sensing by means of PNP proximity sensor. All of this gives me the ability to monitor and control functions of the motor quite precisely. You can also purchase versions of this controller that allow PWM control of the speed instead of the potentiometer which will then allow programmed speed patterns with a micro controller such as Arduino. This will be my next project. **Q: Are there ports to screw the wires in or do they need to be soldered on?** A: There are four screw ports on the side opposite the controller knob. A pair for +/- power and another for motor. They are clearly marked on the under side of the board. **Q: How can I connect this to an Arduino to control a 12V motor?** A: I did it the brute-force way. I drilled a hole in the knob and inserted the shaft of a servo. I then controlled the servo via the Arduino. Not very elegant, to be sure, but nonetheless, effective. ## Frequently Bought Together - RioRand 12V-40V 10A PWM DC Motor Speed Controller with Knob-High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection - BEMONOC Garage Door Motor 12V DC Right Angle Reversible Electric Gear Motor 45 RPM High Torque - ALITOVE DC 12V 5A Power Supply Adapter Converter Transformer AC 100-240V Input with 5.5x2.5mm DC Output Jack for 5050 3528 LED Strip Module Light --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/782808749-generic-product-12v-40v-10a-pwm-dc-motor-speed-controller](https://www.desertcart.pl/products/782808749-generic-product-12v-40v-10a-pwm-dc-motor-speed-controller) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-07*