RESONANCE EFFECTS FOR EVERYONE TO SHARE

[CRANKYpants]

Thank you Thane for the praises and for sharing some of my Guru's (Teacher's) teachings.
I had not seen this video until now.
Thank you for sharing.
Luc

MY BROTHER FROM ANOTHER MOTHER,

WATCHING YOU MAGNETIZE PEOPLE AND THE INFLUX OF HELP AND RESOURCES JUST REMINDED ME OF BABA BUILDING HIS FIRST HOSPITAL WITH ISAAC TIGRETT IN INDIA - I HOPE IT CONTINUES FOR YOU ALL...

CHEERS
Thane

[Groundloop]

@gotoluc,

It is very difficult for me to guess what is wrong with your circuit. But I will suggest also checking
the two diodes that are used on the IR2103 drivers. One way to insulate the problem is by
removing all the transistors and IR2103s. Then you connect the 12 volt and the signal generator.
Use your scope and check both logic outputs from the 40 IC. If both pulses is OK and
is going to the correct pins on the IR2103s then plug in one 2103 and check the output
pulses from that IC. Then test the next 2103. Check the transistors last.

Groundloop.

[Chris31]

Merry xmas everyone, cant believe Im here reading forums LOL anyway 

@luc and groundloop.

Like I said before, without the 22ohms + diode + TVS they will keep poping. I know you guys are trying to achieve OU but it would be very frustrating if you have to keep changing the drivers and the MOSFETs

you are lucky that yours lasted 15 mins, mine lasted for a few seconds 

[gotoluc]

@gotoluc,

It is very difficult for me to guess what is wrong with your circuit. But I will suggest also checking
the two diodes that are used on the IR2103 drivers. One way to insulate the problem is by
removing all the transistors and IR2103s. Then you connect the 12 volt and the signal generator.
Use your scope and check both logic outputs from the 40 IC. If both pulses is OK and
is going to the correct pins on the IR2103s then plug in one 2103 and check the output
pulses from that IC. Then test the next 2103. Check the transistors last.

Groundloop.

Hi Groundloop,

thanks for the reply ... your instructions above is exactly what I have done! 4013 is fine then both IR2103 have output pulses at pin 5 but nothing at pin 7 with all transistors removed.

So I now have 6 IR2103 with no output on pin 7 and have no more ... why is it always pin 7 output blowing?

Luc

[gotoluc]

@Groundloop,

can you do a minimum connection schematic to test only the IR2103's on my breadboard so I can make sure it is not a problem on my circuit board.

Thanks

Luc

ADDED: never mind, I just connected as per circuit on the breadboard p1 12v, p2 and 3 SG, p4 ground, p5 is trig. out, p6 100nf cap to p8, p7 is alt. trig. out, p8 diode to p1 and they all do the same ... NO output on pin 7