{"product_id":"cordwood-puzzle-three","title":"Cordwood Puzzle Three","description":"\u003cp\u003eThe third instalment in Boldport's Cordwood Puzzle series of soldering kits steps it up a notch with \u003cem\u003ethree \u003c\/em\u003elayers, soldered in the old-fashioned cordwood style.\u003c\/p\u003e\n\u003cp\u003eHere are the \u003ca href=\"\/en-eu\/products\/cordwood-puzzle-1\" target=\"_blank\" rel=\"noopener noreferrer\"\u003efirst\u003c\/a\u003e and \u003ca href=\"\/en-eu\/products\/cordwood-puzzle-too\" target=\"_blank\" rel=\"noopener noreferrer\"\u003esecond\u003c\/a\u003e puzzles in the Cordwood series.\u003c\/p\u003e\n\u003cp\u003eIn the 1950s and 1960s inventive engineers saved space by using the '\u003ca href=\"http:\/\/en.wikipedia.org\/wiki\/Printed_circuit_board#Cordwood_construction\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ecordwood\u003c\/a\u003e' assembly, where components were sandwiched in between two circuit boards. This construction became less useful with reduced component sizes, PCB manufacturing advances, more compact integration, and surface mount technology, but is still a lovely piece of history. Combining both old and new, the Cordwood Puzzle series of projects are a tribute to this construction and to the engineers who came up with it.\u003c\/p\u003e\n\u003cp\u003eThe puzzle is to correctly assemble the circuit with the components at hand. Once completed, all of the LEDs light up when power is applied. When connected to a controller board each LED can be individually controlled.\u003c\/p\u003e\n\u003cp\u003eUnfortunately(!), all the comprehensive assembly guides were mysteriously missing from the kits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote: requires through-hole soldering!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/boldport.com\/shop\/cordwood-puzzle-three\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eClick here for the kit contents and assembly guide\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCordwood Puzzle Three\u003c\/em\u003e was project #25 of the Boldport Club.\u003c\/p\u003e","brand":"Boldport","offers":[{"title":"Default Title","offer_id":29443906306131,"sku":"BOLD025","price":15.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/CP3-1b.jpg?v=1565277528","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/cordwood-puzzle-three","provider":"Pimoroni Ltd","version":"1.0","type":"link"}