Archive for the ‘Projects’ Category

100 LEDs, 16 Square Inches

I wrote about a project back in August that I called the Twinkle Tag, as an experiment in PCB design and construction- seeing if I could fit 100 RGB LEDs, plus all the circuitry required to drive them in a scanning array based off the Peggy 2 from EMSL on a four inch square two-layer […]

Posted on December 28, 2010 at 1:18 am by Henry · Permalink · Leave a comment
In: RGB LED Stuff

In Search Of Cheap Fast

Since last time’s disappointment with the performance of the “Alt-Kart” set up with Mars BLDC motor and malfunctioning (now dead) Sevcon PMAC controller it’s been on my summer list to make the kart fast- not perfect, just cheap dirty and fast. To that effect, and to celebrate the ending of summer vacation (classes start tomorrow, […]

Posted on August 22, 2010 at 10:48 pm by Henry · Permalink · One Comment
In: Electric Alt-Kart

Twinkle Tag: An SMD Experiment- Part 1, Design

I’ve designed and had manufactured several PCBs over the last couple years for the Battery Regulator project. I’ve focused on using through-hole parts, using surface mount components infrequently only when necessary. Even after spending hours condensing the components and finding clever ways to rout traces to maximize the use of board- space I find the […]

Posted on August 19, 2010 at 11:58 pm by Henry · Permalink · Leave a comment
In: RGB LED Stuff

REFUEL 2010 at Laguna Seca Pt. 2- Everyone Else

Since I already posted about my experience at Refuel 2010 now it’s time to look at who all else was there. I was excited to see Palatov Motorsport’s cars. I visited the Palatov shop last July in Portland but at the time the dp1 was out of the shop and the dp4 hadn’t been built […]

Posted on July 16, 2010 at 11:39 am by Henry · Permalink · 2 Comments
In: Racing

REFUEL 2010 at Laguna Seca Pt. 1- Me

Now in its second year, the REFUEL all-electric expo and race at Laguna Seca Raceway was held last Sunday, the 11th of July. Held by Speed Ventures, it’s an opportunity for owners of electric cars or motorcycles to drive on track in a track-day setting, as well as compete in a time trial style race […]

Posted on July 15, 2010 at 10:39 pm by Henry · Permalink · 3 Comments
In: EV Miata, Racing

Back in DC/DC again

Despite the troubles I was having before, the DC/DC converter has mended itself and appears to be working entirely as it should. It looks like the problem was caused by enabling the converter with the ignition signal before the precharge was done. The idea being that the precharge circuit is usually used in situations where […]

Posted on July 15, 2010 at 9:49 pm by Henry · Permalink · Leave a comment
In: EV Miata

Back in Action

After having the last couple weeks of my life stolen by first illness, then jury duty, I’m finally back in control and ready to get the stuff that needs to get done done to make the projects that need to happen happen- like the car and the kart. I didn’t shave until I was booted […]

Posted on July 10, 2010 at 12:48 am by Henry · Permalink · 3 Comments
In: Battery Regulator, EV Miata, Life and Times

How Much Electric Kart Can You Build in a Day?

Last week I rebuilt the kart with fresh fasteners and axle bearings, plus picked up a steering wheel and some #35 sprockets. Then, once the Mars motor looked repaired and good to go onto the kart I picked up a handful of 7/8 keyed #35 sprockets from Surplus Center. The parts were forecast to arrive […]

Posted on June 20, 2010 at 11:40 pm by Henry · Permalink · 15 Comments
In: Electric Alt-Kart

Breaking and Fixing the Mars BLDC Brushless Motor

Here’s the short version: Because we are cheap, my friend picked up a Mars “Brushless Etek” BLDC motor from Ebay user “megadan” who has been selling these motors for about half price, with the catch that they are shipped with an odd and difficult to deal with shaft adapter (I’m starting to get used to […]

Posted on June 16, 2010 at 12:45 am by Henry · Permalink · 2 Comments
In: Electric Alt-Kart, Little Fixes

The Most Advanced Scotch Tape Dispenser. In The World.

It’s absolute overkill. Over a pound of 6061 aluminum, every part CNC machined and yes, it’s just a scotch tape dispenser. This is the creation of the Advanced CNC class at Laney College as taught by Bob Rice. I programmed and machined all the parts from drawings using MasterCAM, a Chevalier toolroom mill and a […]

Posted on June 3, 2010 at 11:09 am by Henry · Permalink · 41 Comments
In: Machining, Photo Journo