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BuildCircuit is an online store for selling electronics kits and components related to Arduino, Raspberry Pi, etc. We operate from Sydney, Australia.
We design and sell basic electronic kits and Arduino modules for all electronics enthusiasts.
This product is shipped from Sydney, Australia. Worldwide shipping available- we ship to USA, Canada, New Zealand, UK, EU and Non-EU countries.
This is a breakout board for Freescale’s MPR121QR2. The 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 a four jumpers on the bottom of the board, all of which are set (closed) by default. An address jumper ties the ADD pin to 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 don’t require the pull-up resistors you can open the jumpers by cutting the trace connecting them.
There is no regulation on the board, so the voltage supplied should be between 2.5 and 3.6VDC. The VREG pin is connected through a 0.1uF capacitor to ground, which means, unless you modify the board, you can’t operate the MPR121 in low-supply voltage mode (1.71-2.75VDC).
- Eagle Files
- Datasheet (MPR121QR)
- Example Code (ATmega328)
- Hookup Guide
- Freescale’s Product Page (for Application Notes, etc.)
- Bildr Tutorial
Package Includes: 1 x Capacitive Touch Sensor Breakout - MPR121
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Information about shipping
BuildCircuit is a trustworthy online store established in Sydney, Australia. We have been maintaining our quick shipping service since we started the store in Turku, Finland(in 2012).
Shipping information for international customers
We ship our products to more than 45 countries using Australia Post. Our regular customers are from the USA, Canada and Europe. We are currently using four different shipping methods to ship the orders to international destinations. We request you to select 'Standard Post' or 'Registered Post' while checking out so that you can receive your package quickly.
We usually ship your orders within 1-2 days. Small orders are usually processed and shipped on the same day.
Shipping information for Australian customers
All the orders from Australia are shipped on the next day at 9.00AM. Orders with Express Australia Post are also shipped on the next day if your order is placed before 1.00PM. We provide tracking code for Standard, Registered and Express Post orders only.
Australia Post has never lost any package since we started our business in Ausralia. So, we request you all to buy with confidence.
Are we reliable ? How to know we are genuine sellers ? How is your payment safe ?
1. If you make a payment via Paypal and if we don't ship, you can open a case on Paypal and ask for refund. Paypal will be on your side and they will make full refund.
2. We have been selling on Ebay also and we are TOP RATED SELLER on Ebay. Please check our store: http://stores.ebay.com.au/buildcircuitstore
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4. We have a popular blog www.buildcircuit.com and people from all over the world read our posts. We are seriously in the business, therefore, we WILL ship your orders