Catalog > Internet of Things (IOT) Related Products > More Platforms Touch Pad Board Touch Pad Board ACM TOUCH PAD BOARD ACM TOUCH PAD BOARD --TOUCH TO TTL SIGNAL. 3,3-5VDC Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview Export TTL signal (High when no touch and Low when touched) when fingers are touched it. Features Plug and play, easy to use. Compatible with the mainstream market, 2.54 4P’s Grove interfaces and interfacesM4 mounting holes using standard, compatible with Lego, makeblock is equally M4 standard kit (hexgon kit is not included for this module)PCB size : 38x24x1.6mmWorking voltage 3.3 or 5VDCOperating voltage 3.3 or 5VDCCompatible interfaces 2.54 3-pin interface and 4-pin Grove interface (1)Note:S for digital output portN for not used pinV and G for voltage at the common VCC and GND respectivelyWhen there is no operation, digital output is VDD; when the button is pressed down, the digital output is 0V