Tag Archives: CAD

Bicycles, CAD, Carving, Woodworking

Bike Rack Build – Construction

Content with the CAD model I had drawn up I set to work on actually making it. Step one was to find the materials. I was hoping to make this out of red cedar, like I used on my guitar rack, but Lowe’s didn’t carry any 2×12 red cedar. The only thing available in 2×12 was green douglas fir.

Fortunately, this is also about the cheapest option in the store. I picked out an 8 foot length of 2×12 and 2×6, doing my best to find consistent grain and minimal knots, and headed to the shop.

The first step is getting an overall picture of how much wood would need to be trimmed off. I only had about 8″ of extra length on the 2×6, so I didn’t have much choice laying out the hole patterns. However, I did still have some options with orientation and used the opportunity to cut off the worst of the ends.

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Bicycles, CAD, Design, Woodworking

Bike Rack Design

My new apartment has considerably more square footage than my previous place and I can finally bring my bikes inside out of the elements. This is great considering the added moisture in the PNW. However, we need a way to keep them neat and out of the way but still accessible. They can’t stay leaned up against the wall by the door, anymore.

I picked up a few bike racks from Amazon to mount on the wall. However, as has been an issue in a few other posts, the metal stud drywall setup in the new apartment doesn’t hold up to any sort of load. So after quickly installing the bike in drywall and seeing the drywall anchors slowly pull out of the wall I knew I’d have to take a similar approach I took on my guitar rack. 

Step one is to nail down the design. I took some rough measurements and made a couple quick sketches until I could take it to Solidworks. 

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CAD, Design, Electronics, Guitar

Prototype Boost Built, Testing to Come

Building on my work from a couple weeks ago, I put solder to iron and built up a first prototype of the boost circuit for my buddy’s 8-bit fuzz pedal. Th EagleCAD board layout I made earlier was almost exactly what I needed. However, because I was fumbling my way through the software I didn’t have the correct packages selected for all of the devices.

I tweaked the layout with the actual components I ordered from Digikey a few weeks ago. The biggest curveball was that I ordered some gigantic orange 1000pF caps. I just wasn’t looking that closely at packages when I ordered, but I had plenty of board to work with.

I hooked up some 1/4″ jacks to the I/O terminals and connected a 9V. I tested with my Epiphone Les Paul into a Focusrite Scarlet interface. The signal came through clear and clean, and there was no audible (to me at least) distortion as I rolled through the gain range. 

Test-Setup
Board-Left
Board-Right

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I’ll take the board over to check out the performance characteristics on an oscilloscope soon. Then, I’ll start looking to shrink the footprint of the board as much as possible so I can cram it inside an existing pedal.

CAD, Design, Guitar, Woodworking

Bassman Amp Design – CAD Model

Motivation

The recent find of some good looking 3/4″ plywood was the swift kick I needed to get the ball rolling on a long dormant project. A few years ago I started down the road of building a Fender Bassman clone based on the 5F6 circuit. I was going to do this remotely with a friend. He would handle some electronics analysis for some mods we had in mind, and I would guide the mod selection and build the cabinet. I even went so far as to buy a chassis.

Unfortunately the project never went much further and the chassis sat in the corner of my room for a long time. Then, looking for a CAD project to practice on, I picked it up and got a sheet metal part about 80% done. It was a full box with one of the three faces completed with punched holes.

Getting Started

Knowing I had the chassis model nearly done I started to put together a model of the plywood cabinet. I’ve never had much luck modeling larger assemblies from the ground up and wanted to try something new. I had heard the term “top-down” in relation to CAD models and it seemed like the way to go.

Step one was to do a little research on Fender cabinets similar to what I had in mind. I wanted to skip the 4×10 configuration the Bassman is known for in favor of a much more portable and apartment friendly 1×12 combo. I used a few pictures and drawings of the 4×10 configuration to get an idea for the parts involved, then changed the baffle design and size to fit a single 12″ speaker.

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