{"id":6274,"date":"2023-12-10T12:26:03","date_gmt":"2023-12-10T17:26:03","guid":{"rendered":"https:\/\/pugix.com\/synth\/?p=6274"},"modified":"2023-12-10T12:26:05","modified_gmt":"2023-12-10T17:26:05","slug":"beers-2p4t-analogue-switch","status":"publish","type":"post","link":"https:\/\/pugix.com\/synth\/beers-2p4t-analogue-switch\/","title":{"rendered":"Beers 2P4T analogue switch"},"content":{"rendered":"\n
\"\"
Beers 2P4T<\/figcaption><\/figure>\n\n\n\n

I may be the first owner of this new module from Isaac Beers<\/a>. It is a 2-pole 4-throw binary-addressed bidirectional analogue switch. Isaac wrote:<\/p>\n\n\n\n

\n

Loosely intended to mimic the functionality of the 4052 CMOS multiplexor\/switch IC but each channel can be individually addressed (yay!) and there is no inhibit function (boo!).
<\/p>\n\n\n\n

XA, XB, YA, and YB are the control inputs and any signal patched to them that crosses approx. 0.5V will be converted to a 2-bit binary word and decoded into one of 4 positions for each switch. The control inputs XA and XB will control both switches at once with nothing plugged into YA and YB.<\/p>\n\n\n\n


I initially looked into using solid state relays or dedicated switch ICs to achieve this design (would have been nice) but instead went with a cheaper discrete MOSFET switch circuit using parts I already had loads of.<\/p>\n\n\n\n

Caveats:
It can cleanly switch eurorack signals at \u00b110V or more, although as the input signal\/s approach the power rails they may be clipped at 10.5-11V or so, and ‘off’ legs of the switch may leak\/be forced on.
You may observe a ‘click’ or switching artifact when using the COM jack as an output and a throw with nothing patched in is selected. If this bothers you try patching unused inputs to a source of 0V in your system, or use the common jack as an input instead.<\/p>\nhttps:\/\/www.modulargrid.net\/e\/beers-2p4t-analogue-sw<\/cite><\/blockquote>\n\n\n\n

How it came about<\/h3>\n\n\n\n

I was daydreaming about how to replicate the Ciat-Lonbarde Fyrall in modular. (It’s hard and maybe impossible.) One of the modules I needed was a replication of the CD4052 CMOS switch and I could not find anything. But I did find Isaac Beers’s website<\/a>, where he has designed several switch modules for Eurorack and offers them for sale. The 2P4T didn’t exist yet. I messaged Isaac and he replied that he might make one. A while later and the 2P4T was real. I ordered one assembled (very reasonable price), although they are available for DIY. It is SMD.<\/p>\n\n\n\n

\"\"
Back of the 2P4T module<\/figcaption><\/figure>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

I may be the first owner of this new module from Isaac Beers. It is a 2-pole 4-throw binary-addressed bidirectional analogue switch. Isaac wrote: Loosely intended to mimic the functionality … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":6275,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[161],"tags":[71,211],"class_list":["post-6274","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eurorack","tag-diy","tag-switch"],"yoast_head":"\nBeers 2P4T analogue switch - Richard Brewster's Electronic Sounds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pugix.com\/synth\/beers-2p4t-analogue-switch\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Beers 2P4T analogue switch - Richard Brewster's Electronic Sounds\" \/>\n<meta property=\"og:description\" content=\"I may be the first owner of this new module from Isaac Beers. 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