{"product_id":"circuitron-800-5520-sd-2-3-position-semaphore-driver","title":"Circuitron 800-5520 SD-2 3-Position Semaphore Driver","description":"\u003ch1\u003eCircuitron 800-5520 SD-2 3-Position Semaphore Driver\u003c\/h1\u003e\n\u003ch2\u003eCircuitron Electronics for Model Railroads\u003c\/h2\u003e\n\u003cp\u003eUse with the Tortoise Switch Machine and an upper or lower quadrant semaphore-style signal. Includes al 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. Requires 10-18V DC power.\u003c\/p\u003e","brand":"Circuitron","offers":[{"title":"Default Title","offer_id":37644712738982,"sku":"800-5520","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0520\/1972\/4454\/files\/circuitron-800-5520-sd-2-3-position-semaphore-driver.png?v=1747492867","url":"https:\/\/www.whiterosehobbies.com\/products\/circuitron-800-5520-sd-2-3-position-semaphore-driver","provider":"White Rose Hobbies","version":"1.0","type":"link"}