How to Build the "Digital Tesla Switch"

[Bit's-n-Bytes]

Hi folks, this thread is being started to help those who desire to build and program the "Digital" version of the Tesla switch. Discussions relating to theories on the "Use of the Tesla Switch" should be continued to be discussed in that thread.

I will be posting an updated schematic and code shortly.

Thanks

Bit's

[Bit's-n-Bytes]

Here it is!!!

Hi folks, this thread is being started to help those who desire to build and program the "Digital" version of the Tesla switch. Discussions relating to theories on the "Use of the Tesla Switch" should be continued to be discussed in that thread.

I will be posting an updated schematic and code shortly.

Thanks

Bit's

[nilrehob]

Nice work!

There's one thing i don't understand though:
when Q1 is conducting, what prevents the current through Q1 to make a left-turn before batt 1 through D2, load at J5, D8, load at J6, batt 3 and Q1 again? Is this a wanted path or is it prevented in a way i don't understand?

/Hob

[Bit's-n-Bytes]

Nice work!

There's one thing i don't understand though:
when Q1 is conducting, what prevents the current through Q1 to make a left-turn before batt 1 through D2, load at J5, D8, load at J6, batt 3 and Q1 again? Is this a wanted path or is it prevented in a way i don't understand?

/Hob

Hob, thanks, you may have just pointed out a problem I have trying to track down. I have been unable to get the desired 14V from the anode of D3 to the common cathodes of D4 - D8.

Bit's

[Inquorate]

Hobs and Bits

I have no idea what you guys are talking about, but my estimation of you both just went up a few hundred notches.

I'm glad we have such brilliant minds working on this forum

[Bit's-n-Bytes]

I have no idea what you guys are talking about, but my estimation of you both just went up a few hundred notches.

I'm glad we have such brilliant minds working on this forum

Thanks Inquorate

Bit's

[citfta]

Impressive Job

Hi Bits,


Your dedication and hard efforts to get a digital version of the tesla switch to work are an inspiration to the rest of us. You have certainly accomplished a lot in a short while. I am really impressed by your programing efforts and board design. I used to work in a design department so I know how much effort it takes.

I do have a couple of questions about the circuit though. Hherby pointed out what he saw as a problem with the diode strings at the top and I have to agree with his conclusions. His post was several days ago on the other tesla thread and I was hoping John B. would comment but I think he has been too busy to read all the posts carefully. The concern about the diode string is that if you apply conventional electronic theory which is that electrons flow from negative to positive and from the cathode to the anode there appears to be a short circuit in the top diode strings. If you turn on Q1 current would flow from the negative of battery 1 through Q1 and into diode D5. From there it would go through D9 and then through D3. From there it would go through D10 and back to the positive of battery 1. With nothing to restrict the current flow you would quickly burn out either Q1 or one or more of the diodes. The same situation will occur in the other string if you turn on Q2. I have looked at this for several days now and I can't see how it could work like this. If I am looking at this wrong then please explain because I have made mistakes before where I just couldn't see clearly what was going on. Thanks for any clarification and congratulations on a great job so far.


citfta

[Bit's-n-Bytes]

Hi Bits,


Your dedication and hard efforts to get a digital version of the tesla switch to work are an inspiration to the rest of us. You have certainly accomplished a lot in a short while. I am really impressed by your programing efforts and board design. I used to work in a design department so I know how much effort it takes.

I do have a couple of questions about the circuit though. Hherby pointed out what he saw as a problem with the diode strings at the top and I have to agree with his conclusions. His post was several days ago on the other tesla thread and I was hoping John B. would comment but I think he has been too busy to read all the posts carefully. The concern about the diode string is that if you apply conventional electronic theory which is that electrons flow from negative to positive and from the cathode to the anode there appears to be a short circuit in the top diode strings. If you turn on Q1 current would flow from the negative of battery 1 through Q1 and into diode D5. From there it would go through D9 and then through D3. From there it would go through D10 and back to the positive of battery 1. With nothing to restrict the current flow you would quickly burn out either Q1 or one or more of the diodes. The same situation will occur in the other string if you turn on Q2. I have looked at this for several days now and I can't see how it could work like this. If I am looking at this wrong then please explain because I have made mistakes before where I just couldn't see clearly what was going on. Thanks for any clarification and congratulations on a great job so far.


citfta

I believe you guy's are right. I have an idea how to fix this. By the way thanks. The idea is to install 2 SCR's replacing D9 & D10. SCR(D9) triggered by opto U-Q1 and SCR(D10) tiggered by U-Q2.

Your thoughts.

Bit's

[citfta]

SCR replacement of D9 & D10

Hi again Bits,

I think that would work fine except I think you have the triggering of the SCRs backwards. You want D10 to trigger with Q1 and D9 to trigger with Q2. Do you agree with that? I think you are on the right track. I wish I had a pickaxe18 to work with as I am still having trouble keeping the SG3524n working consistently. I will be traveling for a few days and when I get back I am going to order the pickaxe beginner kit as I haven't done any of that kind of programming. I used to be pretty good at programming PLC's. Programmable logic controllers for those reading this and wondering what we are talking about. I will still be around for a couple of more days before we travel if you have any more questions. John B. of course is much more qualified to give the correct answers, but he said something about being really busy for the next several days, so maybe I can help some.

regards, citfta (Carroll)

[Bit's-n-Bytes]

Hi again Bits,

I think that would work fine except I think you have the triggering of the SCRs backwards. You want D10 to trigger with Q1 and D9 to trigger with Q2. Do you agree with that? I think you are on the right track. I wish I had a pickaxe18 to work with as I am still having trouble keeping the SG3524n working consistently. I will be traveling for a few days and when I get back I am going to order the pickaxe beginner kit as I haven't done any of that kind of programming. I used to be pretty good at programming PLC's. Programmable logic controllers for those reading this and wondering what we are talking about. I will still be around for a couple of more days before we travel if you have any more questions. John B. of course is much more qualified to give the correct answers, but he said something about being really busy for the next several days, so maybe I can help some.

regards, citfta (Carroll)

Sometimes I get a little Dyslexic and get these turn around. I have fixed it and and will run some further test. Check it out;
Thanks.
YouTube - SCR test.MPG

Bit's

[citfta]

Video looks great!!

Hi again,


Your video looks great now! Can't wait to see what kind of charging you get after it runs a while. Keep up the great work!


best regards and a Merry Christmas, Carroll

[redcar1957]

schematic

Bits, Have you posted a schematic of our digital T/S yet?
I did not see here
Thanks Kevin

[Bit's-n-Bytes]

Bits, Have you posted a schematic of our digital T/S yet?
I did not see here
Thanks Kevin

Here is the latest;

B/M


1n4001-Q1 1n4001
1n4001-Q2 1n4001
C1 0.01uf 103
Cap-Q1 1.0uf
Cap-Q2 1.0uf
D1 STPS8H100D 497-2737-5-ND
D3 STPS8H100D 497-2737-5-ND
D5 STPS8H100D 497-2737-5-ND
D7 STPS8H100D 497-2737-5-ND
D2-D6 30CPU04PbE
D4-D8 30CPU04PbE
DB9
J1 Battery Connector DG126
J2 Battery Connector DG126
J3 Battery Connector DG126
J4 Battery Connector DG126
J5 J5 DG126
J6 J6 DG126
LED1 Yellow
LED2 Yellow
Q1 MJL21194
Q2 MJL21194
Q9 MJL21194
Q10 MJL21194
R1 100R 2 Watt
R2 10k 1/2 Watt
R3 10k 1/4 Watt
R4 22k 1/4 Watt
R5 100R 1/4 Watt
R6 100R 1/4 Watt
R7 500 1/4 Watt
R8 500 1/4 Watt
R10 30K 1/4 Watt
R11 10K 1/4 Watt
R12 30K 1/4 Watt
R13 10K 1/4 Watt
R14 30K 1/4 Watt
R15 10K 1/4 Watt
R16 33K 1/4 Watt
R17 10K 1/4 Watt
R18 150R 2 Watt
SW1 Reset E28
TP1
TP2
TP3
TP4
U1 PICAXE-18X
U-Q1 H11d1
U-Q2 H11d1
U-Q9 H11d1
U-Q10 H11d1
Z1 1N4733A

And the Code;

Start:
SYMBOL ChargeSense = W1
SYMBOL BattLVLSense = W2
SYMBOL TotalCompare = W3

Main:
readadc 1, ChargeSense
readadc 2, BattLVLSense

;pause 1000
;If ChargeSense > 200 then '########## Reserved for future use
;high 3 '########## Reserved for future use
;pause 1000
;else
;low 3 '########## Reserved for future use
;endif

let b1 = 0

;let BattLVLSense = 128
;let ChargeSense = 128



if ChargeSense > BattLVLSense then SwitchGroup1
if ChargeSense < BattLVLSense then SwitchGroup2
if ChargeSense = BattLVLSense then SwitchGroup3

let TotalCompare = BattLVLSense + ChargeSense '########## Reserved for future use



SwitchGroup1:
do
high 4, 5
pause 800
low 4, 5
pause 200
inc b1
loop while b1 < 10
goto Main

SwitchGroup2:
do
high 6, 7
pause 800
low 6, 7
pause 200
inc b1
loop while b1 < 10
goto Main

SwitchGroup3:
do

high 4, 5
pause 800
low 4, 5
high 6, 7
pause 800
low 6, 7
inc b1

loop while b1 < 30

goto Main


goto Main

Enjoy.

Bit's

[redcar1957]

Digital T/S

Thank You Bits
How is the testing looking?
are you still getting good charging results?
Kevin

[lanenal]

my circuit

Hi, I had been designing a tesla switch for some while, and below is a circuit I designed. Maybe you will find it interesting.

http://www.energeticforum.com/renewable-energy/3741-simplest-solid-state-tesla-switch-2.html#post45415