{"product_id":"adafruit-ds1841-i2c-digital-10k-potentiometer-breakout-stemma-qt-qwiic","title":"Adafruit DS1841 I2C Digital 10K Potentiometer Breakout (STEMMA QT \/ Qwiic)","description":"\u003cp\u003ePotentiometers are the perfect tool when you want to change your circuit by turning a knob. Turns out, there are times when you want to adjust your circuit without manually turning a knob, and the\u003cstrong\u003e DS1841 I2C Logarithmic Resistor from Maxim\u003c\/strong\u003e can do just that. It's a programmable resistor, similar to an I2C potentiometer like the \u003cstrong\u003eDS3502 I2C Potentiometer\u003c\/strong\u003e, so why another?\u003c\/p\u003e\n\u003cp\u003eThe big difference between the two is how the resistance changes in relation to changes made to the wiper. The DS3502's resistance has a \u003cem\u003elinear\u003c\/em\u003e relationship to the wiper's setting. Each time you change the wiper by a given amount, the resistance will change by the same amount. With the DS1841, the relationship between resistance and the wiper setting is \u003cstrong\u003elogarithmic\u003c\/strong\u003e. This means that as the wiper setting changes, the amount of resistance will depend on where the current setting is in the wiper's range.\u003c\/p\u003e\n\u003cp\u003eLog potentiometers are used in audio applications for things like volume control because they better match the response of human ear to sound.\u003c\/p\u003e\n\u003cp\u003eThe DS1841's resistance ranges from \u003cstrong\u003e22kOhms to 3.7 kOhms\u003c\/strong\u003e and has\u003cstrong\u003e 128 tap points\u003c\/strong\u003e. Even more interestingly, the DS1841 can be configured to \u003cstrong\u003eadjust its resistance based on temperature\u003c\/strong\u003e with hysteresis to keep things from jumping around.\u003c\/p\u003e\n\u003cp\u003eAdditionally, the temperature compensation can be adjusted by using the \u003cstrong\u003eLUT\u003c\/strong\u003e (\u003cstrong\u003eL\u003c\/strong\u003eook \u003cstrong\u003eU\u003c\/strong\u003ep \u003cstrong\u003eT\u003c\/strong\u003eable) built into the DS1841. This table allows you to specify the wiper setting for each of 70 temperature increments between -39 and 100 degrees C, plus one each for above or below that range. You can even manually set the wiper to one of the entries in the LUT.\u003c\/p\u003e\n\u003cp\u003eWorking with the DS1841 is easy. We've put it on a breakout PCB with the required support circuitry and SparkFun qwiic compatible \u003cstrong\u003eSTEMMA QT\u003c\/strong\u003e connectors to allow you to use it with other similarly equipped boards \u003cstrong\u003ewithout needing to solder.\u003c\/strong\u003e \u003cstrong\u003eQT Cable is not included\u003c\/strong\u003e, but we have a variety in the shop. This handy little helper can work with 3.3V or 5V micros, so it's ready to get to work with a range of development boards. To make things even easier we've gone and written Arduino and CircuitPython\/Python 3 drivers to simplify interfacing with your new knob-replacing friend.\u003c\/p\u003e\n\u003cp\u003eFancy as they are, breakouts alone won’t get you far, \u003cstrong\u003eso we’ve written libraries for CircuitPython and Arduino along with example code to make them simple to use.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv id=\"tab-technical-details-content\" class=\"panel-collapse collapse in\"\u003e\n\u003cul\u003e\n\u003cli\u003eDimensions: 25.5mm x 17.6mm x 4.6mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":52217495290144,"sku":"dva1787258153556","price":5.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0946\/3231\/3120\/files\/adafruit-ds1841-i2c-digital-10k-potentiometer-breakout-stemma-qt-qwiic_1.jpg?v=1787258158","url":"https:\/\/www.elmwoodbasket.shop\/products\/adafruit-ds1841-i2c-digital-10k-potentiometer-breakout-stemma-qt-qwiic","provider":"My Store","version":"1.0","type":"link"}