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

[gravityblock]

Guys, what I need help with is a 555 Monostable one shot. I have found many examples on the net, but not sure what values to use. I would like to feed the hall effect pulse to trigger the 555, then be able to adjust the pulse width & length to drive the scr.

Can anyone give me a helping hand ?

Kind Regards, Penno

Here's a simple and dirty Pulse Width Modulation (PWM) With 555 Timer.  Schematic is below.

Part list:

1) 555 timer IC - 1
2) 100K variable resistor - 1
3) 1N4148 Diode - 2
4) 100nF capacitor - 2

The 555 Timer IC:

PIN 1 - Ground
DC Ground

PIN 2 - Trigger
When LOW, it causes the Output pin to go HIGH. Activated when voltage fall
below 1/3 of +V.

PIN 3 - Output
Output is HIGH when Trigger pin is LOW. Output is LOW when Threshold pin is
HIGH. Output is LOW when reset pin is LOW. Output pin is able to source or sink
current.

PIN 4 - Reset
Short to +V when not in use.

PIN 5 - Control Voltage
Grounded through a capacitor when not in use.

PIN 6 - Threshold
When voltage reaches 2/3 of +V, this pin will cause Output to be driven LOW.

PIN 7 - Discharge
Grounded when Output pin goes HIGH.

PIN 8 - +V
DC Power

How it works:

When the circuit is powered up, the C1 capacitor will initially be in a discharged state. Thus, the Trigger (pin 2) will be LOW, driving the Output (pin 3) to go HIGH. Discharge (pin 7) goes HIGH and goes ground. The cycle begins.

The HIGH Output will cause C1 capacitor to be charged through the R1 and D1 path. Upon C1 voltage reaching 2/3 of +V, the Threshold (pin 6) will be activated and drive the Output (pin 3) LOW. Discharge (pin 7) goes LOW. The time it takes for C1 to charge depends on the position of R1.

Since Output (pin 3) is now LOW, capacitor C1 will start to discharge through the D2 and R1 path. When the voltage of C1 drops below 1/3 of +V, Trigger (pin 2) will be LOW, driving Output (pin 3) to go HIGH, and Discharge (pin 7) to go HIGH and shorts to ground. The cycle repeats itself.

You've probably noticed that the circuit is using Discharge (pin 7) to drive the motor, simply by going ground in each cycle. You can add some amount of protection if you're concerned about back EMF from the motor.

Pin 4 and 5 are not used, and pin 1 is simply tied to ground. The circuit can take between +3v to +18v. The Frequency is around 144Hz. Do note that, doubling the value of C1 will reduce frequency to half, tripling will reduce frequency to 1/3, and so on.

Please note:  The 555 timer circuit just gets connected to the motor.  It doesn't change the rest of the circuitry inside the motor such as the hall sensor or mosfet.  This is a very simple circuit to control the PWM and speed of the motor.


GB

[neptune]

Can anyone tell me what is happening , or not happening with Steorn? Is there any news of the promised demonstrations/ experiments . Or is this another Mylow / Agentgates type disappearance scam? Did I miss something?

[maw2432]

Hi Gang,

Viscous pulse in a MetGlass core.  Non canceling mode  first.

http://www.a.com/watch?v=qu21E9s29ZQ

Respectfully
Ben

Ben,   nice coil.   I am looking forward to your next tests. 
What gage wire are you using for you metglas coil?   
Second question what did you use for your inductance tests?  Do you think this meter on ebay work? 

http://cgi.ebay.com/DM4070-2000uF-3-1-2-Digital-LCR-meter-w-self-discharge_W0QQitemZ250522725975QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3a54516e57

specs are Inductance ranges with
200uH/2mH/20mH/200mH/2H/20H
±(2.5%+10)
   

Bill

[k4zep]

Ben,   nice coil.   I am looking forward to your next tests. 
What gage wire are you using for you metglas coil?   
Second question what did you use for your inductance tests?  Do you think this meter on ebay work? 

http://cgi.ebay.com/DM4070-2000uF-3-1-2-Digital-LCR-meter-w-self-discharge_W0QQitemZ250522725975QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3a54516e57

specs are Inductance ranges with
200uH/2mH/20mH/200mH/2H/20H
±(2.5%+10)
   

Bill

Hi Bill,

#22 Wire, 44 turns fills my cores 100% on the inside.   I use a LC Meter IIB by Almost All Digital Electronics I built as a kit 3-4 years ago.

http://www.aade.com/lcmeter.htm

The meter on Ebay looks like it would be an excellent buy for the money and is a absolute necessity in this type of experiments!

More to come as time and energy dictates.......I hope to show that a INPUT power pulse is amplified both in voltage and current hence POWER by the inductance change as it leaves the rotor field.

Respectfully

Ben

[gravityblock]

I've come across some interesting information on the Aharonovâ€"Bohm effect, and I think it is related to the Orbo effect in many ways.  It has to do with the rise time and decay time of the pulse.  Also, with nano-crystalline or layered crystalline materials, such as metglas.  It shows how the core materials and construction freely localizes the B-field (the curled component of the A-potential), and how that leaves the uncurled A-potential extending out into surrounding space.

An easy way to show this localization is to place a strong straight bar permanent magnet in the inside air space of the transformer, across its open diameter. Air gaps at the contact ends should be absolutely minimized. For a core exhibiting the AB effect, almost the entire magnetic field B of the magnet is drawn into the localization area and no longer spills out into space around the bar magnet! A good magnetic field meter with excellent probe, placed directly against the surface of the magnet over one of its poles, will show almost zero “spilling out into space” of the magnetic field B. If this effect does not happen, then one knows that the core is not exhibiting B-localization and is not producing the Aharonov-Bohm effect.

References:

http://en.wikipedia.org/wiki/Aharonov-Bohm_effect

http://peswiki.com/index.php/Site:LRP:The_Suppression_of_the_M.E.G._by_General_Electric

http://www.cheniere.org/techpapers/On%20the%20Aharonov-Bohm%20Effect1.doc


GB