{"product_id":"ky-004-taster-auf-platine","title":"KY-004 push-button module - board with 3 solder pads, up to 24 V","description":"\u003ch3\u003eProduct overview\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eMechanical push-button switch on a carrier board for prototypes and test setups\u003c\/li\u003e \u003cli\u003eContact closed at rest, opens when pressed\u003c\/li\u003e \u003cli\u003eDigital input signal for microcontrollers and single-board computers\u003c\/li\u003e \u003cli\u003eConnection via three solder pads\u003c\/li\u003e \u003cli\u003eOperating voltage up to 24 V\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eProduct description\u003c\/h3\u003e \u003cp\u003eThe KY 004 is a push button on a compact circuit board that provides digital input signals for control tasks. The switch has a closed contact when unpressed and interrupts the connection when pressed. Each press therefore directly signals a change of state to the connected microcontroller.\u003c\/p\u003e \u003cp\u003eThe three solder pads allow wiring without connectors. An operating voltage of up to 24 V is possible, offering flexibility in the power supply. Switching is immediate and reliable, although software debouncing is common.\u003c\/p\u003e \u003cp\u003eTypical applications include robotics projects, where buttons control direction of travel or functions, as well as alarm and control systems with acknowledgement buttons. In prototypes with single-board computers, such modules provide user interaction without additional electronics. The button can also be used to detect end positions in mechanical processes.\u003c\/p\u003e \u003cp\u003eThe button connects directly to digital inputs or outputs on common boards. Debouncing logic in software or firmware is required to filter contact bounce. The module is a complete solution that requires no additional components, but it does need a power supply on the target system.\u003c\/p\u003e \u003ch3\u003eSafety notice\u003c\/h3\u003e \u003cp\u003eThe button is intended solely for building prototypes and for testing and development purposes. It must not be integrated into household electrical circuits. Consult a qualified electrician when working near existing electrical installations. Do not exceed the operating voltage of 24 V, and observe the correct polarity when connecting the power supply.\u003c\/p\u003e \u003ch4\u003ePackage contents\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e1* KY-004 button on circuit board\u003c\/li\u003e \u003c\/ul\u003e","brand":"Funduino","offers":[{"title":"Default Title","offer_id":65997936525661,"sku":"F23106815","price":1.23,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1074\/5649\/5965\/files\/ky-004-taster-auf-platine-funduino-4170035.png?v=1791496227","url":"https:\/\/funduino.com\/en\/products\/ky-004-push-button-on-board","provider":"Funduino","version":"1.0","type":"link"}