STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[Groundloop]

@callanan,

Great job on your motor.

My motor runs. I'm using a Hall switch. But my Iron Powder core gets really warm
and the motor uses too much power. What kind of core material are you using?

Also, I think you got the right most diode in your drawing the wrong way.
As it is now the current is free to flow to ground when the top transistor opens up.

Edit: Attached is my switch drawing.

Alex.

[callanan]

@callanan,

Great job on your motor.

My motor runs. I'm using a Hall switch. But my Iron Powder core gets really warm
and the motor uses too much power. What kind of core material are you using?

Also, I think you got the right most diode in your drawing the wrong way.
As it is now the current is free to flow to ground when the top transistor opens up.

Alex.

Hi Alex,

Thanks for the circuit diagram errata. I will update it shortly.

I am using the following cores from Jaycar Electronics here in Australia. www.jaycar.com.au. See picture below.

You need as many turns on you core as you can possibly fit of medium to pretty thin wire! This will reduce the current input and increase the core saturation for voltages around 12 volts.

Regards,

Ossie

[Groundloop]

@callanan,

Thank you. :-)

Rewinding new core now...........................

Alex.

[hartiberlin]

Ossi,
great new circuit.

Please could you try this circuit
with a big electrolyte cap of at least 10,000 uF or
more and let me know, how fast it will charge up ?

Many thanks.

[hartiberlin]

P.S. Please Ossi,
please reverse also the polarity of the toroidal coils versus each other and see, when the voltage
will rise the fastest in the cap .
Many thanks in advance.

Regards, Stefan.