Any results from your modified circuit?
hellolol, ok sharky! rest and press on. relax when you need, i know it can be over whelming!! ill start to go over the circuit a bit more. the driver circuit is more geared towards being able to control amplitude with other inputs IE. gas throttle/RPM. so really we may not need it in our final design??? Thoughts? i know that's not the way it is but maybe that's the intent?Uploaded the latest version of the schematics. I still have some trouble with getting the pll working, ... the VCO part works as expected but the scanning part is not working yet. Simplified the Voltage Amplitude Control and adapted it to our needs. The cell driver does not work correctly, will first try to get the pll working without the cell driver by connecting the output of the pll directly to a charging choke. When that is working we can put in the cell driver again.hey there sharky, did you find time to make a list of parts we need to play with this circuit? would love to bred board it.
hope all is well! God Speed! ~Russ
I started with the partslist but have not finished it yet, ... promise to get it out by saturday :cool:
All is well, ... still trying to get more than 24 hours out of a day but not succeeding :P
keep up the good work sharky!!! take it easy! god speed!
PS here is a good over view, thanks to Alex Petty for this one.
I simplified the scanning circuit by wiring 555 timer only pin 4 and 8 to 5v vcc , pin 2 and 6 together with a 2,2uf capacitor to ground and pin 3 connected to 2and 6 thru a 100k resistor,(pin 7remain non connected) the same pin 3 connected to the opamp thru a 100k resistor. The feedback capacitor on the opamp is 1uf bipolar... this gives me 3hz ramp wave... i used also a potentiometer to set the ref voltage at the other input of the opamp... good luck
tip: use a simulator