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Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
I figured like the 833C vttc thread, i would start this before i even started the building of it.
It uses a current transformer, 74hc14, ucc37321 and a mosfet. I have the ucc's coming(2 ucc37322 and 3 ucc37321) as well as 5, 22 amp 500 volt mosfets and 3 74hc14's.
I am also going to include the interrupter. Primary will be with 12 gauge primary wire(it will be blue just so you know :P) and secondary will be the same that will will be used for the 833c vttc(i HATE making secondaries). The ic power supply will be a 12 volt transformer with two regulators, one 12 volt and the other is 5 volts(for the 74hc14).
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Well this isn't my schematic... I found it on youtube :P. Umm i suppose to start the oscillation is what it looks like. But i figure 10k would give to strong a signal for the CT to overpower it.... Hmmm idk but the schematic worked for the guy who made it.
Registered Member #989
Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
About the Mosfet Driver, dont use the Inverting Drivers, because if fails to start to oscilate, it gets the mosfet get at High Level and shorts the power supply with the primary.
Registered Member #1407
Joined: Fri Mar 21 2008, 07:09AM
Location:
Posts: 222
Arcstarter wrote ...
Well this isn't my schematic... I found it on youtube :P. Umm i suppose to start the oscillation is what it looks like. But i figure 10k would give to strong a signal for the CT to overpower it.... Hmmm idk but the schematic worked for the guy who made it.
arc starter could you provide us the link for this sstc
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Dr.Volt wrote ...
Arcstarter wrote ...
Well this isn't my schematic... I found it on youtube :P. Umm i suppose to start the oscillation is what it looks like. But i figure 10k would give to strong a signal for the CT to overpower it.... Hmmm idk but the schematic worked for the guy who made it.
arc starter could you provide us the link for this sstc
Yes, of course.
And i now am going to make steve wards mini sstc after this. But first i want this project to be finished to see what i can do with class e.
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
I am going to have to put this project on hold . The place i got the components from sent them in the wrong package. The ucc's where in soic which i could easily get around by using a soic to 8 pin dip adapter. But the 74hc14 came in tssop which is TINY!!!! Smaller than a fingernail.... So i need money until i can continue this project.
Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Arcstarter wrote ...
I am going to have to put this project on hold . The place i got the components from sent them in the wrong package. The ucc's where in soic which i could easily get around by using a soic to 8 pin dip adapter. But the 74hc14 came in tssop which is TINY!!!! Smaller than a fingernail.... So i need money until i can continue this project.
I suppose one 74HC14 doesn't cost that much... Anyway nice to see one of those simple-yet-effective designs again.
Mestre Racerxdl wrote ...
About the Mosfet Driver, dont use the Inverting Drivers, because if fails to start to oscilate, it gets the mosfet get at High Level and shorts the power supply with the primary.
In fact there's an inverter gate (74HC14) before the inverting mosfet driver, so if the circuit fails to oscillate, the mosfet will stay off. Another, noticed the 10K resistor between the interrupter (555) output and the 74HC14 input? I suppose it's there to give a starting pulse to the circuit to make it oscillating. That's actually very clever and I like this schematic a lot because of its simplicity and reliability.
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New Class e sstc.
. The place i got the components from sent them in the wrong package. The ucc's where in soic which i could easily get around by using a soic to 8 pin dip adapter. But the 74hc14 came in tssop which is TINY!!!! Smaller than a fingernail.... So i need money until i can continue this project.
