# Powered beach/fishing cart **URL:** \ **Category:** Uncategorized\ **Created:** [1 August 2020 04:29 UTC](https://forum.core-electronics.com.au/t/powered-beach-fishing-cart/8119 "2020-08-01T04:29:03Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Clarence131772](https://avatars.discourse-cdn.com/v4/letter/c/f05b48/32.png) [@Clarence131772](https://forum.core-electronics.com.au/u/Clarence131772)\ **Post date:** [1 August 2020 04:29 UTC](https://forum.core-electronics.com.au/t/powered-beach-fishing-cart/8119/1 "2020-08-01T04:29:03Z")
Hi Everyone. I would like to motorise a beach cart and be able to operate it with a hand held transmitter. The concept is exactly like that of a remote controlled golf trolley. I have a 12v SLA battery, 12v DC motor for propilsion, a 12v feedback actuator for steering and a 3 channel radio and reeciever. Reseearch on a controller suggested a Pololu jrk G2 21v3 with feedback, I need assistance to connect this all together, electrically of course. Looking forward to your respones. Thanks ---
**Author:** ![Oliver](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/oliver/32/3315_2.png) [@Oliver](https://forum.core-electronics.com.au/u/Oliver)\ **Post date:** [5 August 2020 00:42 UTC](https://forum.core-electronics.com.au/t/powered-beach-fishing-cart/8119/2 "2020-08-05T00:42:55Z")
Hi Clarence, Really sorry for the long delay! There’s a fair bit here, so let’s dive in. The first thing to identify is what signals your radio receiver can/will output to control things. They’ll typically be designed to drive a servo so you may need something to translate the servo control signals into something more useful. Most servos require a PWM or PPM signal: > **[PWM and PPM Difference and Conversion - Oscar Liang](https://oscarliang.com/pwm-ppm-difference-conversion/)** > > RC transmitters use PWM or PPM for transferring digital signal. PWM stands for Pulse Width Modulation and PPM stands for Pulse Position Modulation. As for the motor controller a 21v3 may or may not be suitable - it depends on the electrical specs of your DC motor.12V x 3A is only 36W, so I suspect this won’t be enough for a beach cart. You’ll probably want at least 100W for that - sand is a pretty ineffecient surface to drive on. I’d suggest looking for something rated for about 10A like this: > **[Pololu Jrk 12v12 USB Motor Controller with Feedback](https://core-electronics.com.au/pololu-jrk-12v12-usb-motor-controller-with-feedback.html)** > > The powerful jrk 12v12 motor controller is a highly configurable brushed DC motor controller that supports four interface modes: USB, logic-level serial, analog voltage, and hobby radio control (RC). The controller can be used as an open-loop speed... As for the battery, you can get a rough estimate of the required battery size by multiplying the total Current draw of your system by the amount of time you want it to run for. I’d take a rough guess at 15A for the whole system, and give yourself 2h of drive time, so you’re looking for around a 30Ah SLA battery. If you can let us know some more details on your product specs and once you’ve settled on some components we can get into wiring connections. Regards, Oliver Support | Core Electronics ---
**Author:** ![Clarence131772](https://avatars.discourse-cdn.com/v4/letter/c/f05b48/32.png) [@Clarence131772](https://forum.core-electronics.com.au/u/Clarence131772)\ **Post date:** [5 August 2020 06:26 UTC](https://forum.core-electronics.com.au/t/powered-beach-fishing-cart/8119/3 "2020-08-05T06:26:05Z")
![core.jpeg](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/6/6c96de53a4b2e37bf0183a226c97b1b61ef6c34b.jpeg) Hi Oliver, Thanks for the reply. I did this diagram to show what I wanted to achieve. If you think that the jerk 12vx12 controller is suitable, I will go along with it. To start the ball rolling, let me know and I will purchase it online from you guys immediately. All the other bits I will purchase as we go along. Again, many thanks for taking the time to respond. ---
**Author:** ![Oliver](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/oliver/32/3315_2.png) [@Oliver](https://forum.core-electronics.com.au/u/Oliver)\ **Post date:** [7 August 2020 04:41 UTC](https://forum.core-electronics.com.au/t/powered-beach-fishing-cart/8119/4 "2020-08-07T04:41:23Z")
Hi Clarence, The trick to tackling a complex project like this is to break it down into smaller, separate problems, solve those, then put it all back together to get a complete solution, and iterate a few times to get a better version. I see you’re now looking at using a 250W 12v motor so you’re going to need a controller capable of over 20A. Power = Voltage x Current Power / Voltage = Current 250W / 12V = 20.83 A In this case a 12v12 won’t do you (FYI, Pololu’s naming system for their motor drivers is XvY where X is the rated voltage, and Y is the rated current). In which case you’ll need something like this: > **[VNH2SP30 Motor Driver Carrier MD01B](https://core-electronics.com.au/vnh2sp30-motor-driver-carrier-md01b.html)** > > This carrier board for ST’s VNH2SP30 motor driver IC operates from 5.5 to 16 V and can deliver a continuous 14 A (30 A peak). It works with 5 V logic levels, supports ultrasonic (up to 20 kHz) PWM, and features current sense feedback (an analog... As for the actuator, you might want to use a linear actuator like this: > **[Concentric LACT12P-12V-5 Linear Actuator with Feedback: 12](https://core-electronics.com.au/concentric-lact12p-12v-5-linear-actuator-with-feedback-12-stroke-12v-1-7-s.html)** > > This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 5:1 reduction gearbox that gives the actuator a dynamic load rating of 34 lbs (15 kg) and a maximum speed of 1.7 in/s (4.3 cm/s), and it is rated to... Regards, Oliver Support | Core Electronics ---
**Author:** ![Clarence131772](https://avatars.discourse-cdn.com/v4/letter/c/f05b48/32.png) [@Clarence131772](https://forum.core-electronics.com.au/u/Clarence131772)\ **Post date:** [7 August 2020 06:43 UTC](https://forum.core-electronics.com.au/t/powered-beach-fishing-cart/8119/5 "2020-08-07T06:43:38Z")
Hi Oliver, I have the feedback actuator already. It is the Firgelli optical feedback actuator dynamic force 100kg.