{"product_id":"delta-stop-100-timer-pcb","title":"ΔStop 100 Timer PCB","description":"\u003csection\u003e\n\u003cp\u003eDo you want to build your own ΔStop 100? Then you can just order the PCB that powers the tool! This includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA professionally manufactured PCB\u003c\/li\u003e\n\u003cli\u003eAll components soldered\u003c\/li\u003e\n\u003cli\u003eFully tested\u003c\/li\u003e\n\u003cli\u003eMicrocontroller flashed with ΔStop 100 firmware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou will need to separately provide the housing, knob hardware, power supply (\u003cspan\u003e5VDC 1A), and an appropriate external relay to activate your enlarger. (Such as \u003ca href=\"https:\/\/www.digikey.com\/en\/products\/detail\/sparkfun-electronics\/14236\/7652745\" target=\"_blank\" rel=\"noopener\"\u003ethis\u003c\/a\u003e)\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eΔStop 100 is a dedicated enlarger timer that uses logarithmic, f-stop based timing instead of linear seconds. You set a base exposure in stops and every click changes exposure by a fixed fraction of a stop, so the math stays the same no matter the print size or paper type. That means faster test strips, clearer intent with every change, and less guesswork when a print needs a tiny nudge instead of a full second.\u003c\/p\u003e\n\u003cp\u003eIt behaves the way photographers already think: exposure as stops, not time. The interface is focused on repeatable decisions, so you can move from test to final with confidence and keep a consistent record of the choices that got you there.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/section\u003e","brand":"ΔStop 100","offers":[{"title":"Default Title","offer_id":47965469049052,"sku":null,"price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/3147\/6956\/files\/PCB_727d454f-f828-458f-a9c8-a40325f8c2c2.jpg?v=1774035125","url":"https:\/\/deltastoptimer.com\/products\/delta-stop-100-timer-pcb","provider":"Delta Stop","version":"1.0","type":"link"}