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Post by Marathonman on Apr 28, 2021 13:44:03 GMT -6
Teensy 4.1 8 shift register board is being made as we speak and will arrive next week or so. i am gathering up the BOM of this board and the N channel transistor board. the testing of two channel board was haulted because of 805 diode shortage which has been rectified, pun intended.
i have five Teensy 8 shift register boards coming as well as the 4.1 Teensy with all the trimmings.
Regards, Marathonman
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Post by Marathonman on May 8, 2021 7:15:27 GMT -6
Received Teensy timing breakout boards and Teensy. boards look awesome and i must say JLC did a better job then PCBWay did. i will post pics later today.
regards, Marathonman
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Post by Marathonman on May 11, 2021 8:05:31 GMT -6
Trying to find all associated peripherals for the Teensy in one spot is not happening. what i am trying to do is outfit the Teensy 4.1 completely so i do not have to fiddle with them latter. i plan on doing remote monitoring and things like sensor, USB, Ethernet, expanded memory. the only pins that will be not facing up will be the MOSI, SCK, CS and 5 volt input. the rest of the pins will be facing upward for my usage later, the previous will not be available since they are for the main shift program.
The rest of the parts are on their way which is good. i plan on making the Teensy removable so if i have to replace a defective part it can be done quite easily. the JST connectors from the Teensy to transistor board will be made with ribbon cable which i have decided to position on the bottom of the Teensy breakout board for a straight shot to transistor boards and as short as possible.
so far the testing of the breakout board are great and the 5 volt 1 amp LDO is perfect in function. the shift registers as well as the Transistor high side drivers were chosen because of their schmitt trigger action eliminating all possibilities of false triggering from noise. the LDO has 10 uf input and output capacitance plus an input reverse voltage protection diode as well as .1 uf bypass on every shift register. separate power and ground plains were included as well as multiple via connections.
Regards, Marathonman
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Post by Marathonman on May 19, 2021 19:07:20 GMT -6
Right now i am having major power issues with the new Teensy 4.1 . it seems it can not run the entire 8 shift registers because of power issues and shuts down. with the 4.0 this was not a problem and matter of fact the LED's were almost to bright. i have reached out to PJRC forum to locate the problem. the new board design rocks like no tomorrow and i can not be more pleased. i tested it with the Teensy 4.0 with no issues what so ever. i am presently hooking up the test bed for the new board with the addition of 125 mm female connectors to test the full functionality with the LED's. once this has passed the muster i will move fprward with the high side board after i trouble shoot an issue with the high side driver it self.
Regards, Marathonman
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Post by Marathonman on May 23, 2021 10:27:02 GMT -6
Received OSH Ethernet/USB board today and will be soldering the parts. i still have power issues with the Teensy 4.1 that basically shut down entirely when installed on my breakout board. the Teensy 4.0 works just great so i suspect a bad voltage regulator on the 4.1. not to happy with this because it is brand new.
Regards, Marathonman
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Post by Marathonman on May 28, 2021 10:45:56 GMT -6
My 125 mm connectors should be in today or tomorrow so i will be doing further testing with my new timing board. i will post the results and possibly a follow up video showing the sweeping action of the LED's. i still have not found the reason for the power reduction of the Teensy 4.1. as for now i will continue with the 4.0 which works just great until the time where i can figure out what is wrong with it. Regards, Marathonman
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Post by Marathonman on Jun 1, 2021 6:57:01 GMT -6
Ordered SMD LED's and resistors for LED break out boards i had made a while back. these will be used to test my Teensy signal breakout board with Teensy installed. i can then get a good visual on the switching or rather the shifting of the bits from the program i posted. i already know it is good but a good visualization is always best. i will post results of course.
Regards, Marathonman
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Post by Marathonman on Jun 4, 2021 8:25:01 GMT -6
Received LED's and Resistors for breakout board post tests. have two soldered and the board functions just great with the Teensy 4.0. i will finish the other 6 and make video then post on forum. Teensy breakout timing board is a complete success.
Regards, Marathonman
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Post by Marathonman on Jun 5, 2021 7:39:32 GMT -6
Complete success
All LED breakout boards attached are working perfectly. when i slow the program down you can see the end channel pause for a moment which is perfectly in line with the rotating brush that would have the ends on for anywhere from three to five times longer before it hits the next winding. you can not distinguish the pause at high speeds but trust me it is there and is there for a purpose. it will allow the secondary output to have a signature rounded peak sine wave output from the inductive roll off from the pause. this is exactly as i have observed and striving to achieve in the electronic switching.
the Teensy 4.0 has worked perfectly but the 4.1 on the other hand does NOT. i may have gotten a lemon and it does happen with mass production. when i attach the 4.1 it freezes every time and thus is with the same program, power and board. i will try another 4.1 but if that fails i will request a refund.
in the transistor category, the test board i have had a major blowout. at the ground pin of the low side i had arching on one of them and literally destroyed the high side driver yet left the one on the left perfectly fine. i am going to rework and replace the high side driver and retest. i can also use better solder then i have been using as in the liquid form from a syringe which is not as current tolerant as others. once i get a successful test i will move forward with the transistor board.
all in all i am extremely happy with the electronic implementation and since it is only 60 channels of shifting i can basically add more then one loop per channel if needed which will allow me to have any such amount of winding's i need on part G active inductor controller.
the timing board will or can be posted on this site if others are interested in the design. it is compact, neat, clean and gets the job done perfectly. you can either have them made yourself or you can order them from me along with the B.O.M.
PS. video will be posted Sunday the 6th of the slowed down program to see the pause at the end and then the high speed action.
Regards, Marathonman
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Post by Marathonman on Jun 20, 2021 17:13:56 GMT -6
To reduce complexity i have reduced the transistor count on the board to 16 to match that of the Teensy shift register board. this way i do not have to add 5 position connectors and or duel grounding wires to different connector. on the last transistor board i will have only 12 channels populated instead of 16.
Regards Marathonman
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Post by greywolf47 on Aug 16, 2021 17:17:18 GMT -6
How much is one of the circuits you describe? I need to be able to handle 12 volts to ground very similar to a Ford model 'T' ignition coil and timer for the vibrator switch in the igniton. Thanks Greywolf47
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Post by Marathonman on Aug 21, 2021 20:51:47 GMT -6
I am not sure what you mean. the board in question is 5 volts to the shift register and 5 to 3.3 volts for the Teensy. the high side drive which is isolated being fed 15 volts goes high at 2 volts. Sorry for the late reply, it seems i have to remodel the place i am staying before i can get situated.
Regards, Marathonman
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Post by greywolf47 on Aug 26, 2021 19:23:03 GMT -6
HOPE you are getting settled in at the new dwelling. Always a hassle getting organized and back on track. I have moved several times and know the drill. I sympathize with your ordeal and wish you well. Hang in there!Greywolf47
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Post by Marathonman on Aug 30, 2021 20:26:55 GMT -6
I have followed your posts on other sites and completely disagree with your findings and would absolutely need proof of your path of so called "as close to the patent as i can get". the only real problem that people have in reproduction is the lack of realization of the total reluctance of the return path thus the proper induction of the primaries to the secondary's.
Figuera's so called commutator is an active inductor controller plain and simple, that returns potential back into the system in the form of forward biasing allowing the high primary to increase in inductance compensating for the loss of induction from the reducing primary through the act of reduction for the sweeping action to occur. remind you this is needed because of the DC operation of this device.
Good luck. Regards, Marathonman
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Post by Marathonman on Aug 31, 2021 8:53:50 GMT -6
Mechanical switching does not belong here as this is for Electronic switching only. there is to much confusion combining the two.
Thank you Kindly, Marathonman
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