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Archive for January, 2014

LED Cyr wheel v2: LEDs arrived

I got my LEDs today! I did some basic testing, and they seem okay. That’s awesome..I saved like half the cost of buying them from a US supplier. The new wheel is bent; I used my Harbor Freight bender. Here are a few pictures of the setup. I have been using a fan to keep the hack/motor cool. It works extra hard when going in one direction. My first wheel I bent with it got quite a bit of spiral, and I thought it might be due to the dies not lining up quite perfectly. So this time, I used... [read more]


LED Cyr wheel: Tests

Here’s my planned wire diagram (it will probably change a bit) It may only make sense to me. I’m wonder if the LEDs that are furthest from the power source will be equally bright. This is for a 5 piece cyr wheel. Based on the diagram, it is now clear to me that the segment furthest from the battery will have its power inlet at most 2/5 of the circumference away. A 5v power ring will run throughout the wheel to power each section, with an on/off switch close to the battery. My wheels have about a 34″ inner radius.... [read more]


Molex Micro Fit Connectors

I was going to use molex micro fix connectors; they can carry up to 5amps…but I think that isn’t enough, as the wheel could draw 10+ amps. So, I ordered some Molex Mini Jr connectors. However, I used some of the micro fit connectors to test stuff, and I literally spent 3 hours trying to crimp the pins on! They just were not “clicking” into there plastic housing. I destroyed several pins, tried the male side, the female side, and even ground them down to see how they work. I then looked at the molex diagram and realized what I... [read more]


LED Cyr Wheel: power draw

In one of my last posts, I discussed power draw. In theory, 360 LEDs on each side of the wheel (720 total) might draw a ton of power (20+amps) based on the specification for the LEDs. UPDATE: Scratch what I have below. I wasn’t measuring full on, but only half! I have two 67 length strips (about 2/5ths of my wheel on one side), and it draw 5.56amps. So yeah, about 0.04149 amps per LED, and I will have: ~330 per side, ~660 total: 27amps. I’m going to probably have to software limit full brightness to never reach this high,... [read more]


LED Cyr wheel: battery

11.1v 1200mah Lipo battery compared to a 9.6v 1400mah NiMH 8-cell pack: And the rainbow pattern on my LEDs:


Plug Bug: New front brake pads

I wear out brake pads faster than normal since I don’t have regenerative breaking or a normal “ICE” engine to slow me down. I replaced my first set of pads really quickly, but the second set seemed to be lasting a lot longer. I would keep an eye on them and see how they were doing every now and again, and a month or so ago they looked good. But today, the bug’s brakes were screaming (a crunchy metal on metal sound), and I knew something was up. The bug has also been pulling slightly to the right when braking,... [read more]


Turnigy Accucell 6 Charger: do not buy!

I bought the Turnigy Accucell 6 charger to charge LiPO cells for my LED cyr wheel. It has already failed! I charged one cell with it, and started discharging it. The display went to all squares like this: I emailed Hobby King to see if they will replace it. That was last night (no response so far). Shipping by Hobby King was also horribly slow (I’m used to Amazon). UPDATE: Hobby King is sending me a new one under warranty. Hopefully it lasts longer than one charge…


LED Cyr wheel: More LED Notes

Teensy/Hardware control LEDs! I got my Teensy 3.1 board and started playing with the digital LED strips I got. I was having a heck of a time getting any sample code to work. I finally cut off the first LED and soldered the leads to the second one; then things started to work! I must have killed it accidentally; probably with reverse voltage, or other thing. As noted in Notes on v2 WS2812B LEDs would be better to use, as they have reverse protection built in. What library to use? I am looking at using the AdaFruit NeoPixel library, or... [read more]


LED Cyr wheel jig completed, and casting

I completed the jig, centered it on the wheel and then screwed the jig to the wooden sliders: I took the jig off, and cut out the center hole to be bigger than 1/2″ (I think 5/8″) It slides pretty easily along the tubing: I stuck in a 1/2″ end mill (the width of the LEDs) and played around with it until I got the depth I wanted. The jig is fairly simple, and works pretty well! That is a nice clean, straight cut. Done in two passes. Now I’m playing around filling it with the SmoothOn EpoxCast. It is... [read more]


LED Cyr Wheel: Jig for groove

First, I got my HH-66 Vinyl Cement mentioned in the adhesives post. I tested gluing a piece of wheel together, and it works somewhat..although it takes a long time to dry and doesn’t do any “gap filling” like I was hoping it would. But, the real test is the pull apart test…and I was hoping it would be impossible (or really hard) to pull apart. Unfortunately, it is probably just as difficult to pull apart as the hot glue, and the hot glue has the advantage of quickly curing, and being able to fill gaps. So, gluing together is really... [read more]


Bathroom Remodel Done!

I finally completed all the trim and paint in my master bathroom remodel! It looks awesome! I am happy with every bit of it. Some of the final pictures below: Left side of the sink / vanity cabinet: I custom made the cabinet; the bottom floats 2″ completely off the ground, and the top section floats 2″ off of the bottom section. The mirror is custom made by myself out of scrap cherry, and an old mirror I had laying around that I cut to size. Unfortunately, it has a small scratch on top..and I cracked some of the wood... [read more]


Uploading Sketchup (skp) files into WordPress

So, I want to use Ecto (and probably other blog tools, like MarsEdit) to upload Sketchup .skp files, but it was always giving “invalid file type”. I poked around in WordPress, and here is what I modified to make it work: Edited wp-includes/functions.php, and found: get_allowed_mime_types(..) and added this to the list: ‘skp’ => ‘application/sketchup’, Then in wp_ext2type() added ‘skp‘ to the ‘text’ type mapping: It seems that both are required to allow it to work. Geez..it took me forever to figure this out!


LED Roue Cyr – Jig to slot tubing

Here’s a sketch up design I did of a jig to cut a groove in the PVC tubing for the LEDs. A router will be attached in the center; it will (hopefully) be used to move over the horizontal wheel on the ground and rout out a groove for the LEDs. Sketchup file:(LED Cyr wheel jig (v2).skp)


LED Cyr Wheel v2 (Parts List – LED stuff)

Here is a running parts list of what I’m buying for my new LED Cyr Wheel v2: LEDs/Microprocessor: 10 – $3.20 – COM-08982 – Electrolytic Decoupling Capacitors – 1000uF/25V ($0.32 ea.) 2 – $39.90 – DEV-12646 – Teensy 3.1 ($19.95 ea.) only one is needed 1 – $119.95 – COM-12028 – LED RGB Strip – Addressable, Sealed (5M) 1 – $24.95 – COM-12027 – LED RGB Strip – Addressable, Sealed (1M) Total: $168 (plus shipping) Note: I spent about $190 here..ordering extra stuff not listed above (but I got 10% off) Connectors: (For connecting wire-to-wire from each wheel segment). I... [read more]


Metal for Cyr Wheels

I just ordered some metal from a local place to make another cyr wheel / roue cyr; it used to be Metal Supermarkets but now is Guerrilla Metals. I ordered 2 20′ pieces of 1.5″ OD (outer diameter) tubing with 1/8″ thick sidewall, 6061 aluminum tubing. And 12′ of 1 1/4″ OD by 3/16″ sidewall DOM (cold rolled steel). Enough for two cyr wheels, total price: $321.73. So, a bit over $160 per wheel for the metal alone. I ordered fasteners from Amazon: Flat Socket Head Screw 18-8 Stainless Steel – 5/16″-18 x 3/4″ Qty-25– $10 including shipping; I have... [read more]



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