Specification Brand : Reland Sun BulletPoint : 20sets LM393 Speed Measuring Module Sensor Slot Type IR Optocoupler DIY Kit with Encoders BulletPoint1 : This is a kits,need buyer to assemble it. BulletPoint2 : Power display is to take some , perform simulations show the percentage of segments, such as 3.7V , take the lower 3V, the upper limit of 4.2V, 4.2-3 = 1.2V, the difference between the lower limit of 1.2V, is the battery Analog BulletPoint3 : LM3914 can accurately detect an analog , and 10 LED display, display LED is lit 10 , or in a stripe pattern individually lit LED BulletPoint4 : Display Displays the battery between the lower limit of 10 files showed that representatives of each of the lights 10% displays, on behalf of 10 lights display 0% -100% ; you can also change the single light display, is displayed only a light, more power, single-light power 4mA, all bright 42mA BulletPoint5 : Equipment needed: an adjustable power supply, accuracy of the decisions of the panel display. Watches word screwdriver. Color : Red ExternallyAssignedProductIdentifier : 7683240016043 ExternallyAssignedProductIdentifier1 : 0755752174928 ExternallyAssignedProductIdentifier2 : 755752174928 IncludedComponents : 1 ItemName : 20sets LM393 Speed Measuring Module Sensor Slot Type IR Optocoupler DIY Kit with Encoders ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 10 centimeters ItemPackageDimensions_Width : 8 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : circboard-prototyping-boards Manufacturer : Reland Sun Material : Circuit board + electronic components ModelNumber : 15-775-2 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : 755752174928 ProductDescription : 20sets LM393 Speed Measuring Module Sensor Slot Type IR Optocoupler DIY Kit with Encoders ProductSiteLaunchDate : 2025-03-06T09:13:50.384Z Size : As pictures shown SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 46171600