{"id":7193,"date":"2025-01-09T16:18:30","date_gmt":"2025-01-09T21:18:30","guid":{"rendered":"https:\/\/pugix.com\/synth\/?p=7193"},"modified":"2025-01-09T16:18:32","modified_gmt":"2025-01-09T21:18:32","slug":"open-frame-eurorack","status":"publish","type":"post","link":"https:\/\/pugix.com\/synth\/open-frame-eurorack\/","title":{"rendered":"Open Frame Eurorack"},"content":{"rendered":"\n
\"\"
Open frame rack getting modules<\/figcaption><\/figure>\n\n\n\n

What to do when you have too many modules? Build another rack, of course!<\/p>\n\n\n\n

I had parts for an open frame rack that I wasn’t using. Two 104hp rails with M3 sliding nuts, bookended by two aluminum end pieces. Not an enclosure, just a frame. It needed a power supply with some kind of power distribution. I don’t like flying bus power cables. I had used a Tiptop Audio Passive Bus Board<\/a> before and decided to get another one. This time I paired it with a 4ms Row Power 35<\/a> module. The first task was to figure out how to mount the bus board.<\/p>\n\n\n\n

\"\"
Tiptop passive bus on custom aluminum panel<\/figcaption><\/figure>\n\n\n\n

Over to my local hardware store to buy a piece of aluminum sheet, plus a length of aluminum angle bracket. Luckily, the end pieces of the frame had pre-tapped M3 holes in convenient locations. I used these with the angle bracket material and the sheet metal to build a shelf for the bus board. The bracket running along the bottom edge (above) adds some strength to the assembly.<\/p>\n\n\n\n

Connecting power<\/h3>\n\n\n\n

The Row Power 35 has a place for an MTA156 header, the same used for MOTM modules. I soldered one of my MTA156 headers there for easy detachment.<\/p>\n\n\n\n

\"\"
Power connections<\/figcaption><\/figure>\n\n\n\n
\"\"
Row Power 35 connected<\/figcaption><\/figure>\n\n\n\n

The bus board has an onboard 5V three terminal regulator that takes its input normally from a uZeus power module on a terminal labelled VR. I repurposed that terminal to supply +5V from the Row Power 35 instead. I removed the onboard regulator and then jumpered from the VR line over to the +5V distribution.<\/p>\n\n\n\n

\"\"
Regulator removed and jumper added<\/figcaption><\/figure>\n\n\n\n
\"\"
Left end of bus board<\/figcaption><\/figure>\n\n\n\n
\"\"
Right end of bus board<\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

\"\"
Left end of rack, powered up<\/figcaption><\/figure>\n\n\n\n
\"\"
Right end of rack powered up.<\/figcaption><\/figure>\n\n\n\n

I used the Joranalogue Audio Test 3<\/a> to measure the voltages, all of which were very close to perfect.<\/p>\n\n\n\n

\"\"
The obligatory ground banana jack<\/figcaption><\/figure>\n\n\n\n

I like to add a banana jack connected to the zero volt line, “ground”, so that I can patch between Eurorack cases and banana systems by connecting their power supply commons together. I also run ground cables between any Eurorack cases that I’m patching across, so that the signal patch cables do not have to carry current in the shield.<\/p>\n\n\n\n

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

What to do when you have too many modules? Build another rack, of course! I had parts for an open frame rack that I wasn’t using. Two 104hp rails with … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":7195,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_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},"jetpack_post_was_ever_published":false},"categories":[161],"tags":[172,71,159,90],"class_list":["post-7193","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eurorack","tag-case","tag-diy","tag-eurorack","tag-power-supply"],"yoast_head":"\nOpen Frame Eurorack - 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\/open-frame-eurorack\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Open Frame Eurorack - Richard Brewster's Electronic Sounds\" \/>\n<meta property=\"og:description\" content=\"What to do when you have too many modules? 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