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The Capacitive Touch Keyboard uses the MPR121 IC from Freescale with 12 touch sensitive keys/pads. The MPR121 IC detects the touch by measuring change in capacitance of touch pads and talks via I2C interface. It’s designed to work with both 3.3V and 5V systems and has all the necessary level shifting and regulator on board.
Ever had this logic level mismatch when trying to connect a 3.3V Device with a 5V System, well forget about it, you need this Bidirectional Logic Level Converter with 8 channels to solve your logic level mismatch by stepping up and down 3.3V and 5V at the same time and also works with 2.8V, 2.5V, 1.8V.
This board consists of the FT232RL IC with pin header & screw terminals for the UART and other signals from FT232RL. Also it has a dedicated 3.3V regulator. Can run on 3.3V and 5V logic levels which can be selected via the Jumper. And all the pins of FT232RL brought out on the 14 pin header.
This cute little board consists of the FT232RL IC and all the necessary components to get the USB to UART interface kicking. Can run on 3.3V and 5V logic levels which can be selected via the Jumper. And all the pins of FT232RL brought out on pin headers.
This is a module for ACS712 ±20A hall-effect based AC/DC Current Sensor with just 1.2 mΩ resistance of input path from Allegro. And outputs a proportional analog voltage on Vo pin of 185 mV/A centered at 2.5V with a typical error of ±1.5%. It operates from 4.5 V to 5.5 V and is intended for use in 5 V systems.