{"product_id":"foot-pedal-potentiometer-sewing-machine-speed-controller-discontinued","title":"Foot Pedal Potentiometer - Sewing Machine Speed Controller [Discontinued]","description":"\u003cp\u003eWe've had a foot pedal \u003cem\u003eswitch\u003c\/em\u003e in the store for a while but some people have contacted us asking if there was a way to retrofit it to perform variable speed control, like a potentiometer. And here it is! This is a\u003cstrong\u003e Foot Pedal Potentiometer\u003c\/strong\u003e (a.k.a Sewing Machine Speed Controller).\u003c\/p\u003e\u003cp\u003eThis is a really nice quality one, very sturdy, with a friendly 3.5mm 'audio' connector on the end, so it's incredibly easy to integrate into your project. You can use a 3.5mm terminal-block adapter, in-line wired jack, breadboard jack, or a panel mount jack. A lot of the cheap samples we looked at have a wall plug, are very low resistance (because they're meant to go in-line with the mains power) or are not very durable.\u003c\/p\u003e\u003cp\u003eWhen no pressure is placed on the pedal, you'll read about 20 KΩ. When pressed down all the way, you'll read about 1 KΩ, and the resistance change is linear with the motion. Connect one side to ground, then the other side to a 10K resistor pull-up to your microcontroller's logic voltage. Then read the divided analog voltage, like you would with a photo-cell or other 'resistive' type sensor.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch2\u003eTechnical Details\u003c\/h2\u003e\u003cdiv id=\"tab-technical-details-content\" class=\"panel-collapse collapse in\"\u003e \u003cul\u003e\n\u003cli\u003ePower cord length: ~5ft \u003c\/li\u003e\n\u003cli\u003ePedal body: 135 x 85 x 56mm\u003c\/li\u003e\n\u003cli\u003eResistance: approx. 1KΩ - 20KΩ\u003c\/li\u003e\n\u003cli\u003eRated voltage: 15V DC\u003c\/li\u003e\n\u003cli\u003eRated current: 3mA max\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProduct Dimensions: 135.0mm x 85.0mm x 54.0mm \/ 5.3\" x 3.3\" x 2.1\" \u003c\/p\u003e\n\u003cp\u003eProduct Weight: 188.0g \/ 6.6oz \u003c\/p\u003e\n\u003cul id=\"product-files\"\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":48623807103194,"sku":"bql1789679121337","price":27.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0824\/8318\/3834\/files\/foot-pedal-potentiometer---sewing-machine-speed-controller-discontinued_1.jpg?v=1789679125","url":"https:\/\/memoryfoamwear.shop\/products\/foot-pedal-potentiometer-sewing-machine-speed-controller-discontinued","provider":"My Store","version":"1.0","type":"link"}