{"id":5635,"date":"2023-03-06T16:56:38","date_gmt":"2023-03-06T21:56:38","guid":{"rendered":"https:\/\/pugix.com\/synth\/?p=5635"},"modified":"2023-03-06T18:20:48","modified_gmt":"2023-03-06T23:20:48","slug":"toppobrillo-triple-wave-folder","status":"publish","type":"post","link":"https:\/\/pugix.com\/synth\/toppobrillo-triple-wave-folder\/","title":{"rendered":"Toppobrillo Triple Wave Folder"},"content":{"rendered":"\n
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TWF in Barcode front panel<\/figcaption><\/figure>\n\n\n\n

Toppobrillo’s TWF was designed in 2010 and is now discontinued. But you can still build one. SynthCube<\/a> sells the PC board with several different panel options. I chose the black Barcode panel for looks, though it’s made from PC board material. The panel set includes a pot and jack PCB designed by Barcode that plugs right into the main PCB, avoiding the panel wiring needed on the original TWF.<\/p>\n\n\n\n

Sourcing parts<\/h3>\n\n\n\n

SynthCube provides only their own Bill Of Materials (BOM) as documentation. I suggest looking at synthCube BOMs for the other panel versions. The one I downloaded was missing the 10 47pf capacitors. Also look at the old SDIY site<\/a> for TWF documents.<\/p>\n\n\n\n

The headers I used for hooking the boards together:<\/p>\n\n\n\n

Mouser 649-77311-118-03LF, male three and four-pin (-04LF) versions<\/p>\n\n\n\n

Mouser 649-76308-103LF, female three and four-pin (-104LF) versions<\/p>\n\n\n\n

Half-inch standoffs listed in the BOM were too long at 12.5mm for the headers I bought. I ordered 11mm standoffs with m2.5 threads, Mouser 710-970110151.<\/p>\n\n\n\n

The build<\/h3>\n\n\n\n

There aren’t any step-by-step instructions for building this module. But it shouldn’t present much difficulty for a builder with some experience. I did the headers last, assembling the two-board sandwich with the standoffs before soldering them.<\/p>\n\n\n\n

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TWF bare main PCB<\/figcaption><\/figure>\n\n\n\n

The board is well made and easy to solder. But the identifiers are under the parts. There’s no pictorial guide for placement, so I took the above photo for reference. Not listed in the BOM are five spots on the bottom for SMD bypass capacitors. I added them.<\/p>\n\n\n\n

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Two of the SMD caps, and a little fix<\/figcaption><\/figure>\n\n\n\n

There’s a small error in the PC board. One of the 0.1 bypass cap leads is left unconnected to ground. I left the lead long enough to bend over and reach the pad for one of the trim pots (right side in photo). No one would notice any difference if it wasn’t connected anyway.<\/p>\n\n\n\n

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Bottom of main board<\/figcaption><\/figure>\n\n\n\n
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Top of main board showing soldered-in chips<\/figcaption><\/figure>\n\n\n\n
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Assembled Barcode PCB<\/figcaption><\/figure>\n\n\n\n
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Backside of Barcode PCB showing the blue female headers<\/figcaption><\/figure>\n\n\n\n
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Fully assembled<\/figcaption><\/figure>\n\n\n\n

A little demo video<\/h3>\n\n\n\n
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