Gated Pulse Frequency Generator Schematic

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The gate is only a mean for controlling gas output, in later design actually it is probably substituted by the injectors signal... think about it...

What about the stepcharging?

From my understanding, the "Step Charging" that Stan refers to is just a way of saying charging a capacitor with pulses, in a step method other than just charging a capacitor with a single applied voltage.

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The gate is only a mean for controlling gas output, in later design actually it is probably substituted by the injectors signal... think about it...

What about the stepcharging?

From my understanding, the "Step Charging" that Stan refers to is just a way of saying charging a capacitor with pulses, in a step method other than just charging a capacitor with a single applied voltage.

I read your posts and Dons on the thread about the function of the gated pulse...that once the pll finds the res freq of the LC crkt you have to manualy adjust the gating to match the ''cap'' charging times,you pointed that Tony with a graph on how much% the cap is charged by adjusting the gate.

Look at the behaviour of the gated signal when i turn the gate pot on diffrent freq setings(att)

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You guys know how to make a simple test circuit for 74122?because i want to know if its broken or not because is expensive to order another one all the way from England!

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In a simulation I have been able to prove that the gated pulse at resonance would actually charge a capacitor with a higher charge.

See attached image.  There is a switch beside a relay that is being pulsed at 200hz.  The resonant frequency of this circuit is 1.047khz.  When the switch to activate the gate is off (closed), the max charge of the cap is about 50V.  When the switch is opened, allowing it to gate, the cap charges to over 80V.  The step up transformer is a 1:4 and the source voltage is 14V.  Changing the duty cycle on the gate up to 90% increases the cap charge to up to 110V.

TS

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Don, A26 you didn't label it...is it a 74122???

(http://www.globalkast.com/images/tonywoodside/Fig.6-values.png)

74123 will work better because the inputs are combined within the chip instead of tying them together outside like pins 1&2 and 3&4

ali can you came up with a schematic for the 74123 similar to Stan's?

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In a simulation I have been able to prove that the gated pulse at resonance would actually charge a capacitor with a higher charge.

See attached image.  There is a switch beside a relay that is being pulsed at 200hz.  The resonant frequency of this circuit is 1.047khz.  When the switch to activate the gate is off (closed), the max charge of the cap is about 50V.  When the switch is opened, allowing it to gate, the cap charges to over 80V.  The step up transformer is a 1:4 and the source voltage is 14V.  Changing the duty cycle on the gate up to 90% increases the cap charge to up to 110V.

TS

this play with bemf,TS.but switch from secondary,Is the same frquency of relay(200hz)?maybe this is the real circuit of Stan.

Do you know about Triac of Meyer's Part?

gated at short duration(90-95duty cycle,5-10% gated),mean high voltage high amps(from Bemf) short duration.

-when you write patents,you must use trick word like "Switching Diode" to keep secret. i know that picture is diode why explain and place name "switching doide"???use 10khz but use switching diode(for high frequency)?normal diode(1n1198,1n4001-7) can operate at over 50khz,why use switching diode? what do you think?

Credit all to Timeshell,Regard.
geenee

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How an earth the pulse output of the 74122 should look? see att.

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In a simulation I have been able to prove that the gated pulse at resonance would actually charge a capacitor with a higher charge.

See attached image.  There is a switch beside a relay that is being pulsed at 200hz.  The resonant frequency of this circuit is 1.047khz.  When the switch to activate the gate is off (closed), the max charge of the cap is about 50V.  When the switch is opened, allowing it to gate, the cap charges to over 80V.  The step up transformer is a 1:4 and the source voltage is 14V.  Changing the duty cycle on the gate up to 90% increases the cap charge to up to 110V.

TS

Even further to this.  If you decrease the impedance of the transformer from 900mh down to like 45mh, when gating, the cap voltage can reach >3kV!

TS