This MPR121 is a capacitive touch sensor controller driven by an I2C interface. The chip can control up to twelve individual electrodes, as well as a simulated thirteenth electrode The MPR121 also features eight LED driving pins, when these pins are not configured as electrodes, they may be used to drive LEDs. There are four jumpers on the bottom of the board, all of which are set (closed) by default. An address jumper ties the ADD pin to the ground, meaning the default I2C address of the chip will be 0x5A. If you need to change the address of the chip (by shorting ADD to a different pin), make sure you open the jumper first. Jumpers also connect SDA, SCL, and the interrupt pin to 10k pull-up resistors. If you do not require the pull-up resistors you can open the jumpers by cutting the trace connecting them.
| Operating Voltage |
2.5 to 3.6VDC |
| Color |
Black |
| Material |
Alloy+Plastic |
| Interface |
I2C |
| Length (mm) |
30 |
| Width (mm) |
20 |
| Height (mm) |
2 |
| Weight (gm) |
10 |
| Shipment Weight |
0.010 kg |
| Shipment Dimensions |
5 5 1 cm |
Due to the type of products we sell, we accept limited returns. Below are the conditions where we can accept a return request.
You must report any damage within 3 days of receiving the product. Please send clear pictures of the damaged item and packaging along with a short description. Once our support team accepts the claim, we will arrange a replacement or a full refund, including return shipping costs.
If the item you received is different from what is shown on our website, you must report it within 3 days of receiving the product. Please send a video of the first-time unboxing that clearly shows the sealed package, the opening process, and the products received, along with clear pictures and a short description of the issue. Once our support team verifies the claim, we will accept the return and provide a refund or replacement as per your choice.
If the product is defective or not functioning as described, please notify us within 3 days of receiving the product. Include proper pictures, a short video, and a description of the issue. Once our support team verifies the defect, we will provide a replacement or a complete refund, including the return shipping cost.
If any item or accessory listed on the order is missing from the package, you must notify us within 3 days of receiving the product. You are required to record a proper video while unboxing the package for the first time (showing the sealed package, opening process, and all contents). Please also share pictures of the received items and the packing list or invoice. Once our support team confirms the missing item, we will ship the missing item at no extra cost or issue a partial refund.
We don’t accept returns for products damaged due to improper use. Moreover, we don’t accept returns if the ordered product is not suitable for a specific application. Please read the product specifications and datasheet carefully before placing an order. Returns are accepted only within 3 days from the date of delivery.
We ship all over India with free shipping on all prepaid orders above ₹500. For Cash on Delivery (COD) orders, ₹80 will be charged for orders below ₹599 and ₹30 for orders above ₹599.
For any questions related to shipping, please contact our support team at support@quartzcomponents.com.
Note: The minimum order value for COD orders is ₹500.