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* Actual delivery times may vary due to holidays, weather conditions, or customs delays.
Return items will be accepted within 40 days when is the date of receiving the goods. Customized items cannot be returned or exchanged. Items bought with an e-gift card are exchangeable only; refunds are not applicable.
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Shipping Policy
We will work hard to deliver items to you after receiving your orders and make sure they arrive safely. Delivery details will be provided in your confirmation email.In most cases, orders are processed within 2 days.Under special circumstances, it will be delayed as follows: When you place an order on Saturday, Sunday or public holidays, it will be delayed for 2 days..Normally, it needs 5-7 working days (Monday to Friday) without being affected by flight delay or other environmental factors..Because our shipping service is worldwide so the delivery times will depend on your location so it may need a few times and please wait patiently if you are in remote districts or countries.
1. Return & Exchange Policy
We only accept items purchased from roymall.com. If you purchase from our local distributors or other retailers, you cannot return them on our side.Final sales items or free gifts are not acceptable for a return.To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.After receiving return instructions from us, please package up your returned items and drop your package at the local post office or another courier. We will process your return or exchange item within 3-5 working days after we receive it. The refund will be processed and credited automatically to your original method of payment.No returns or exchanges can be accepted if the product was custom produced, including custom size, custom
color, or custom printed.Need more help, please contact us. service@roymall.com or Whatsapp: +447549870296
2.Refund Policy
You'll get a full refund or 100% store credit after we receive the returned package and check it. The refund will be processed and credited automatically to your original method of payment.Please note that shipping costs and any duties or fees are not refundable. The extra shipping costs are non-refundable once the package has been shipped. You are responsible for paying these fees and we’re unable to waive or refund them, even if the order is returned back to us.Once we received and confirmed your returned item, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.If you have any problems regarding the refund process, please contact us. service@roymall.com or Whatsapp: +447549870296
Description:
This expansion board is a full-featured robot expansion version on market that can support multiple motors/stepper motors/servos (Stepper/Motor/Servo) at the same time,and can be stacked to expand more control interfaces.It"s especially fit for various applications such as DIY robots,smart cars,robotic arms, smart pan/tilts,etc.The control interface simply adopts the I2C interface and is compatible with 3.3/5V levels,so it"s also fit for other development boards on market. note: Due to different batches, the appearance, color, and printed words of the product may vary, which does not affect its use.
Specifications:
Working voltage: 5V~12V Interface: I2C interface description: 1. 4-way servo interface (#0, #1, #14, #15) 2. 4-way motor interface (M1, M2, M3, M4) 3. 2-way stepper motor interface (M1+M2, M3+M4) 4. I2C interface Size: 65 x 56 x 21mm Weight: 0.02kg Material: PCB Colour: Blue
Features:
1. Single power supply, the normal working power supply voltage range is 5V~12V; (Please select the correct input power supply voltage and current according to the motor control voltage you control) 2. Complete data input/output through the I2C bus of for the Raspberry Pi, 3. One I2C interface, compatible with 5V level, can be controlled by for Arduino or other development boards 4. One I2C interface can be connected to various sensors to expand various applications 5. The address of the expansion board is determined by 4 address pins, and a maximum of 16 expansion boards can be used at the same time. 6. Supports 16 PWM channel outputs and can control 16 servos or LED lights. 7. 12-bit resolution, adjustable PWM frequency up to 1.6KHz, configurable push-pull or open-drain output 8. Supports 4-way servo interface and 3P standard interface to facilitate connection of servo and LED lights. 9. Supports 2-channel 6V~12V stepper motors, Supports 4-channel 6V~12V reduction motors 10. Support infrared receiving function for convenient infrared control
11. Improved 4-way servo interface for easier stacking 12. Added 50Mhz crystal oscillator to PWM chip to provide better reference clock 13. Added I2C level conversion chip to support 5V level I2C sensor interface (Raspberry Pi only supports 3.3V by default)
Tips:For questions about your order, place of delivery, product discount, taxation, delivery time, warranty, shipping, payment, exchange rate, and other questions unrelated to the product, please contact customer service.
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