5Pcs MPR121-Breakout-v12 Proximity Capacitive Touch Sensor Controller Keyboard Development Board
$24.54
Shipping:Standard Shipping about 10-25 business days
Secure Payment:Paypal,VISA,MasterCard
Description
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 to 3.6VDC. The VREG pin 2.5 and 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).
Package included
5 x MPR121-Breakout-v12 Proximity Capacitive Touch Sensor Board
Weight | 0.02 kg |
---|
Customers Also Viewed
REX-C100 Digital RKC PID thermostat Temperature Controller 0 To 400 Degree K Type Relay Output
$24.04Electronic Accessories & SuppliesAdd to cartSize ConversionInchesCentimetersPlease according to your own measurements to choose your suitable size. The tags inside the items will show in our Asian (Type) size.FeaturesThis is a double universal programmable digital display temperature controller that supports many types of thermocouple sensor.It is powered by 220V ACSpecificationsScreen:Double screen for Celsius (C)Range:0-400C (Only when with K-type thermocouple factory)Thermocouple:K, …
High Gain 10dB 2.4G Wifi Directional Image Transmission Yagi Antenna
$20.07RF amplifierAdd to cartSpecificationWorking frequency:2.35-2.55GHZAntenna gain:10.5dB (typical value)Antenna standing wave ratioPower capacity:10WMechanical size:5x10Cm (excluding joints)Radiation direction:directional linear polarizationConnector type:SMA-K (standard female, outer screw and inner hole, can be customized)Package included1 x Antenna
20pcs DD2712SA 3.5A Mini 5V-27V to 12V DC DC Step Down Buck Power Converter Module Voltage Regulator
$83.70Boost & Buck ModuleAdd to cartDescriptionInput voltage:5-27VOutput voltage:5V Maximum output current:2.5AShort time maximum output current:3.5A Quiescent current:about 250uAWorking frequency:900KHz.Working efficiency:77-92% Size:25 x 15 x 6.3 mmOvertemperature shutdown, Under-Voltage Lockout (UVLO), BS-voltage protection, and short circuit protection.Note1. Input voltage can not be greater than the maximum input range.2. Output power can not be greater than the maximum load for a long …
Quick Charge 3.0 DIY Power Bank 18650 Battery Case QC3.0 5V 9V 12V DIY Kit Power Bank 2A 18650 Battery Fast Charger Shell
$25.14Module ComponentsAdd to cartNote1. Please Use flat-headed 18650 DIY2. If use the old battery,pls test the voltage,more than 3.5v and the Internal resistance less than 60 .3. It can’t use the flashlight 18650 battery4. Do not connect the positive and negative terminals backwards, otherwise it will burn the circuit board5. Don’t close the cover until the test is …
25x25x5cm Soundproofing Triangle Sound-Absorbing Noise Foam Tiles
$14.16FoamAdd to cartDescription25x25x5cm Soundproofing Triangle Sound-Absorbing Noise Foam TilesSpecificationsMaterial:Polyurethane foamDimensions:25 * 25 * 5 cm / 9.84 * 9.84 * 1.97 inchBlack:ColourQuantity:1pcFeatures– Bounce rate deformation, a long duration.– Waterproof, anti-moisture, good air permeability.– Wherever to help block sound and prevent echoes in the room.– These panels provide a strong noise reduction, good for studios, recording studios, vocal …
25x25x5cm Soundproofing Triangle Sound-Absorbing Noise Foam TilesRead More
Reviews
There are no reviews yet.