So I whipped up an etched board of my lastest revision of the thermal protection idea I'm working on, and it turned out pretty nice and ALMOST worked. Almost, because I'm an idiot and shifted the top row of pins on the TQFP package and the clock and data lines for the screen were going to button inputs instead of data lines for the screen.
It wasn't a total failure though. It's a tiny tiny double sided board and is the first home etched board I've ever assembled. All my traces lined up for the bottom to top connections, and I successfully soldered the SMD 32 TQFP package to the board and was able to communicate with it through the ISP headers I integrated to the board design - all of whose pins changed sides on the board. (#winning). I didn't bother to finish populating the connectors and last components when I found out the screen wasn't going to work.
Technically it works, just not fully.
Below is a comparison. The protoboard is about 3.2 x 2 inches and the home etched board I designed is 1.7 x 1". I've finally got the etching process down to get great etches most of the time.
Maybe tomorrow I'll have the gumption to etch a board that has the pins shifted to the proper positions :P
I also received this nifty little POGO flashing tool today from Hobby King that works on 32TQFP. It's pretty killer and is gonna allow me to get rid of the ISP pins on my board and use that room for a fun feature idea I have ;)
So, first, the video you've all been wanting to seeeeeeee... the DYNAMIC DIGITAL IGNITION video!!! huzzah! Sexy curves in action:
monitoring the switching pin on the microcontroller to make sure it isn't going to be fried.
board prototype idea
This happened the day before I left for spring break and was glorious. Spring break packin:
I'm working on making this ignition more physically robust and perhaps making a debut of it at Inverness. I still have a little to do moped wise though and a lot to do car wise. Old Yeller has to be gone through entirely for road worthiness as the 2 inch hitch on that car could likely haul both bikes. If it can't, I may be inclined to take brownie since I know his service record better and he has many "new" parts. Brownie needs the new sport exhaust package installed from IPD though, so that has to happen tomorrow if it ever shows up. I'd have to throw a bike on the roof though, and that coupled with is 4 speed transmission = terrible gas mileage.
Spring break wrenching 2014 first up was the maxi. I'll get some new pics of it posted some time before I leave maybe, but I added some chrome trim to the frame and it is CLASSY. Wiring is cleaned up, painted and detailed flywheel and finished up all the little stuff (like shortening the speedo cable). This bike is done for a while till it gets a reed kit. ZA50 geared at 21x37 and has so far been GPS'd at 51mph with all stock parts.
Next up was the derbi. Lots to do to this little guy. I made a puller for the clutch... hardware was $3 total. Had the parts lying around since last time I was home ;) Then I raised the exhaust port a little and resealed the engine (no leaks, knocks on wood). Thought I needed new crank seals but turns out pre-mix was just running down the electrical into the stator (no airfilter) sweet. For some reason, the condenser all the sudden quit working though - like instantly. I was out riding and got a GPS speed of 41 out of it and then it started backfiring. Points arced like a beast, so I did a condenser and all was well. Nothing changed timing wise it just up and quit. Weird/LAME. Can't wait to put digital ignition systems on all my bikes. I also made a CVT cover because the thing throws junk ALL over the frame. GPS speed of 41 was with lots of airleaks, so I'm leaning it out now that it's sealed up.
The weather in Inverness will be glorious. I can't wait. High today was like 40 and last night it was flurrying.
Here's a quick video of the bike running on a trinket controlled digital ignition. Static timing still needs to be verified and ignition needs to be calibrated, before messing with dynamic timing, but it runs and revs out. Rode it around the block before I had to put it away. Spring break is next week, so expect lots more updates.
My static code is pretty simple, sweet and short:
On the to-do list before inverness:
make adapter to mount homoet 6p to vespa or derbi for inverness
rebuild the puchonda engine with the manual transmission
tidy and pretty up the maxi
fix the transmission in the general
modify the 2" rack on Old Yeller to accept two mopeds
make mounts for putting mopeds on the thule rain rail mounted rack
make sure no more of my exhaust on Brownie is going to fall off
last and foremost, get the trinket ignition off the SLA and running off of the vespa electrical
