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Datasheet (FS7548)
These adapters are listed only to help SparkFun users that have rare or odd antenna coupling needs
Pentax (except Minolta SONY as they use a special hot shoe)
How about taking an analog to digital reading from 16 devices with only 1 ADC channel and 4 control pins
SparkFun Concave Button - Blue Buttons/Switches Filter Sets Datasheet (FS7548)This is a 35mm concave momentary push button similar to the ones you find on arcade games. Simple screw in design. Perfect for mashing. This button has a great tactile, clicky feel. Features: Concave plunger design Durable nylon material Microswitch: max 3A @ 120 VAC Microswitch reliability tested to 10,000,000 cycles Includes 3 terminal microswitch Net weight: 25g Dimensions: Cap diameter: 35mm Overall height: 65mm Mounting hole: 1 1 8th inch paddle