{"title":"SparkFun Servo Trigger - Continuous Rotation","handle":"sparkfun-servo-trigger-continuous-rotation","url":"/products/sparkfun-servo-trigger-continuous-rotation","description":"The SparkFun Continuous Rotation (CR) Servo Trigger lets you control a hobby CR servo motor without any programming. Simply connect a servo and a switch, adjust the three onboard potentiometers, and the board handles everything — when the switch changes state, the servo transitions between two speeds/directions over a configurable time period.\n\nBuilt around an ATtiny84 microcontroller with pre-loaded CR servo firmware, the board draws just 5 mA at 5 V and supports daisy-chaining multiple boards by connecting VCC and GND pads together.\n\nKey Features\n\n\nNo Programming Required – Control CR servos with just a switch and three pots\n\nThree Potentiometers – A (switch-open speed), B (switch-closed speed), T (transition time)\n\nConfigurable Input Polarity – Works with switches or logic signals\n\nConfigurable Response Mode – Choose how the servo responds to input changes\n\nDaisy-Chainable – Connect multiple boards via VCC/GND pads\n\nISP Header – Reprogram the ATtiny84 for custom firmware\n\nLow Power – ~5 mA draw at 5 V (servo current additional)\n\n\nSpecifications\n\n\nRecommended Voltage: 5 V DC\n\nMaximum Voltage: 5.5 V DC\n\nCurrent Draw: ~5 mA (board only)\n\nServo Compatibility: Analogue continuous rotation servos\n\n\nIdeal For\n\nRobotics projects without a microcontroller\nAutomated displays and animatronics\nKinetic art and interactive installations\n\n\nResources\n\nHookup Guide\nSchematic (PDF)\nEagle Files\nATtiny84 Datasheet (PDF)\nGitHub Repository\n","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":11036,"title":"Default Title","sku":"SF-WIG-13872","price":34.37,"on_sale":false,"in_stock":true,"available_quantity":118,"option1":"Default Title"}]}