Ward's Build of Bob Boyce's TPU

[HumblePie]

@All,

Here are some photos of my Bob Boyce TPU windings.  I used the spec'd materials; 16 & 20 AWG Ag on  solid Cu PTFE.  My Teflon 16AWG OD is .0775" & 20AWG is .0535" OD insulation.  The 20AWG Mag Wire winds are 48t outside and inside, 30t bottom and top.  Teflon Secondary is 129 turns.  Prim's are 30 turns each.  Wires terminate at inside near bottom, with slack still for moving to top if needed.  The freq's of resonance do not all match where the segments between 4 and 8 O'Clock resonate about 100KHz higher than the others of about 780KHz each.  Seems to be related to position of Secondary ends that meet at 12 O'Clock.  It is what it is and it is wound.  Secondary spacers are .080" trimmer line.  Primary spacers are .065" trimmer line, for a full outside fill of the 6 segments.  If you use too much tape, you fit in less winds and these spacers won't give full fill outside, but will have less peaks and valleys to fight when spacing the very tight Prim's.  Fill in those spaces with wax, then tape perpendicular to valleys to minimize them.

 



I will move my post of Dual124 Decoder GAL here next post, with some simulation shots and source code so others may burn their own.

Ward

[HumblePie]

@All,      Edit 22-Oct-07 Posted new source and Sim's showing two firing order options:  First is Firing Order 'A' one 12X clk left of 'B', or 'A' three 12X clk's right of 'B'.  Finished test vectors and tri-state function for all output pins.  This version ensures nothing is being driven when count = 0, the only inactive clk cycle, and one less inactive cycle.  I suppose only active low output option is missing now, for inverting drivers.  Some of you have asked how the counter equations work.  For starters, '*' is AND and '+' is OR.  '/' means low state  Each line describes when signal left of ':=' is true.  ':=' means 'act as Flip Flop', whereas '=' means 'without clock / asynchronous'.  If you look at the comments in the source (.pds) text file, you can see the binary counts by just reading the comments, turning the page right so LSB 's0' appears on right.

Edit:  Nov-14-2007 - New GAL, negative pulses, 3 or 6 Primes, and pulsed mode with 2 switches posted here:
http://www.overunity.com/index.php/topic,3506.msg59117.html#msg59117

Ward here.  The attached images are simulations of  EDIT Nov-28 .jed file .jdc file for programming a GAL using AMD's PALasm program in WinXP.  Simulation works great.  I hope the test vectors agree.  I can slide the firing orders around with respect to each other using the 12X CLK source.  The pulse width is equal one 12X CLK period and can be set in these multiples.  There are two dead CLK cycles where no drive is happenning.  If I slide the 2nd firing order right one more 12X CLK, I can reduce it so there is only one CLK cycle where some Prime is not being driven during that CLK cycle.  I have also posted the source file so you can program your own.  Had to rename as .txt Vs .pds as is usual.  Comments should be good enough so you can change it if you want.  For example, I will use spare inputs to allow selecting the CLK offset between firing orders.

Although this seems like a 1 chip solution, you still need a buffer chip after this GAL for placing delays between for adjusting fine phase with either  RC, or LC delays.  Anyway, this is preferred to using a counter to address 12 EEPROM locations over and over containing same timing, delivered at same phase as the GAL.

Beware of PALasm posted on web that is copy protected.  It yields BIOS errors or inability to generate log files that took long to understand was bogus software.  PM me if you want copy of PALasm for yourself, or PALasm questions answered.  It is freeware.  It may be old, but it is very very handy.  GAL's can be linked into powerful combinations.  Do not under estimate there abilities.  You can buy a programmer for about $90 on ebay or build an LPT model for $35.  GAL's are reprogrammable and hold data for 20+ years.

Edit:  OK it appears cheaper still to build if you forget the fancy ZIF socket.  If you build, do buffer your LPT port or you will be risking that ports life.  This link shows how to build and links to free GAL Blast software.     http://www.geocities.com/mwinterhoff/program.htm 
I am checking to ensure this unit at ebay executes test vectors. 
http://search.ebay.com/search/search.dll?sofocus=bs&sbrftog=1&from=R10&_trksid=m37&satitle=gal+programmer&sacat=-1%26catref%3DC6&sargn=-1%26saslc%3D2&sadis=200&fpos=95033&sabfmts=1&saobfmts=insif&ftrt=1&ftrv=1&saprclo=&saprchi=&fsop=1%26fsoo%3D1&coaction=compare&copagenum=1&coentrypage=search
Test vectors are optional and are just  strings of ones and zeros, some inputs, some expected outputs, clk's etc... so the programmer can quickly test the device.  Especially handy if you ever suspect the device.  You can run tests out of circuit to try new designs before building the rest of the circuit.

Ward

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C:\Documents and Settings\Administrator\My Documents\My Pictures\WARDS_Oct21_2007\124LowerA+3-.jpg [/img]

[MarkSnoswell]

Hi Ward,
   Excellent work

Hey -- I will probably be in your area for a press conference on Jan 24th (a the the San Jose Art Museum) . I'll make sure that I have time to visit this time

cheers

Mark.

[Bruce_TPU]

Hi Ward,

Your work looks and sounds excellent! 

I look forward to hearing your results once you connect the coil to your controller. 

If you run into a challenge, be sure to ask Bob B. in the "no image" thread.

Thanks for starting your own thread and the build update!

Warm regards,
Bruce

[HumblePie]

@All,

I updated the code for different firing orders.  See Reply #1 for new files & Sim's.  .jed file there now so you do not need PALasm.  Just burn it.  Surplus GAL's cost about $3, $5 new.  If you need programmed, just ask.

Ward