{"product_id":"circuitron-800-5520-sd-2-3-position-semaphore-driver-for-tortoise-switch-machine","title":"Circuitron 800-5520 SD-2 3-Position Semaphore Driver for Tortoise Switch Machine","description":"Use with the Tortoise Switch Machine and an upper or lower quadrant semaphore-style signal. Includes all the logic circuitry to drive the signal to all three positions. Works with BD-1 or BD-2 Block Occupancy Detectors. A minimum of two blocks must have detectors installed for the SD02 to indicate all three positions. All scales\u003cbr\u003eRequires 10-18V DC power","brand":"Circuitron","offers":[{"title":"Default Title","offer_id":42130983911506,"sku":"CIR-800-5520","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0581\/3410\/2098\/files\/CIR-800-5520-2__35379__11239.jpg?v=1756175400","url":"https:\/\/modeltrainstuff.com\/products\/circuitron-800-5520-sd-2-3-position-semaphore-driver-for-tortoise-switch-machine","provider":"Model Train Stuff","version":"1.0","type":"link"}