login
The project described here is a 3 channel capacitive touch sensor based on CAP1203 chip from Microchip which is a multiple-channel capacitive touch sensor controller. It has 3 x individual capacitive touch sensor inputs with programmable sensitivity for use in touch sensor applications. 3 x touchpads are provided on PCB to detect the touch. Each sensor input is calibrated to compensate for system parasitic capacitance and automatically recalibrated to compensate for gradual environmental changes. The CAP1203 includes Multiple Pattern Touch recognition that allows the user to select a specific set of buttons to be touched simultaneously. If this pattern is detected, a status bit is set and an interrupt is generated. The CAP1203 has Active and Standby states, each with its own sensor input configuration controls. Power consumption in the Standby state is dependent on the number of sensor inputs enabled as well as averaging, sampling time, and cycle time. Deep Sleep is the lowest power state available, drawing 5µA (typical) of current. In this state, no sensor inputs are active, and communications will wake the device.
3 Channel Capacitive Touch Sensor with I2C – [Link]
RELATED POSTS
22 April, 2016 Raspberry Pi Wifi module without USB
13 February, 2020 STMicroelectronics STM32L5 series of ultra-low-power MCUs
16 February, 2018 Raspberry Pi Plus Cloudio – A Personal IoT Computer with Drag and Drop Programming
17 June, 2020 Selpic offering Portable Printers at 20% discount on the eve of Father’s Day
11 March, 2021 Axiomtek’s Outdoor AI Inference System with NVIDIA® Jetson™ Xavier™ NX for AIoT Applications – AIE800-904-FL
7 October, 2015 LiFePO4 charger
Your blog gave me proper knowledge about capacitive sensors. These CAP1203 include Multiple Pattern Touch recognition that helps us to select a specific set of buttons to be touched simultaneously. But these electrotechnical sensors are to be durable and their quality, performance depend upon their brand. So these should be purchased from authorized dealers.