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Registered Member #989
Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
With 74HC14 the Wave will be corrected to Square wave, its better than put direct to the PLL, but direct to PLL works too.
I dont know if 60T its much or less, if you have a scope that measure voltage, see what voltage is going at coil, the better is like the VCC of the PLL (or 74HC14), some like 5v or more. The diodes will stabilize the over-voltage than 5V to VCC and GND.
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
I have had exelent luck using your scheme, although I used 50 turns on the primary, and instead of a series resistor on the output I used a 400r resistor in parallel with it.
Registered Member #989
Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
Linas, I forgot the clamping diodes, that will make the Wave a good Square, you really dont need the 74HC14. On the out of the PLL its good to have one 74HC14, the PLL out its like a Triangle Wave, not all time a Square (some schematics doesnt get a Square Out), so, the 74HC14 on PLL Out will correct it.
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PLL driver with current xformer
