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Cordwood puzzle (first edition)

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Cordwood puzzle (first edition)

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sold out

Cordwood puzzle (first edition)

20.00

Hackaday has the Cordwood Puzzle in stock!

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In the 1950s and 1960s inventive engineers saved space by using the 'cordwood' assembly, where components were sandwiched in between two circuits boards. This construction became less useful with reduced component sizes, PCB manufacturing, more compact integration, and surface mount technology, but is still a lovely piece of history. Combining both old and new, the Cordwood Puzzle is a tribute to this construction and to the engineers who came up with it.

The puzzle is to correctly assemble the circuit with the components at hand. Once completed, all LEDs light up when power is applied. When connected to a controller board each LED can be individually controlled. (When connecting to a board, make sure that the I/Os can tolerate the voltage levels that are applied to the Cordwood! Also, make sure that you do not short power and ground!) Unfortunately(!), all the comprehensive assembly guides were mysteriously missing from the kits (if you're up for spoilers, the complete assembly guide can be found here).

The kit contains two PCBs (96.6x16.6 mm each; ENIG finish), 6x LEDs, 6x FETs, 12x 2 W resistors, 1x capacitor, 2x 24.5 mm M3 standoffs, 4x 8 mm M3 screws, and a bit of 0.84 mm diameter wire. A BoM for the circuit components is here.

Buy one to challenge yourself, or as a gift to a fellow engineer!

As usual, this circuit is open source hardware -- get the files and make some for yourself!

Note: Squarespace, unfortunately, does not yet fully support the EU/UK VAT system. If you're in the EU/UK, 20% VAT is included in the amount that you'll pay, despite it indicating 0% VAT at checkout. If you need a VAT receipt please get in touch before purchasing.)