Kapanadze Cousin - DALLY FREE ENERGY

[starcruiser]

This scope is a good starting point, should handle most of anything you are working on now. If you are looking for more test CPE, look at a sweep gen that can get to 20mhz at least with a variable output and ability to generate sin, sq and saw waveforms as well as the ability to adjust the duty cycle.

[Hoppy]

  I've won the Ebay add bid on a 20mhz Tectronics scope. And I'm in the process of buying it now and getting it here.
  I hope that you approve...

  http://www.ebay.com/itm/El-30-Tektronix-2205-20mhz-Analogico-Osciloscopio-/391137289927?pt=LH_DefaultDomain_0&hash=item5b119966c7&nma=true&si=F9zFiOqEjqFo1hhcTcP2OXxW1kY%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

  Let me know what you think.
                                               NickZ

Well done Nick. Your sight should now improve. 

[NickZ]

  Hopefully my bulbs will also brighten up, as well.
  I am listening, Hoppy, and I'm buying this 20mhz scope as you recommended.
  I'll be working on improving and updating my device as needed, until it works.
And then some...
    Cheers,
                Nick

[Tomtech29]

Hi.
and such a simple way to figure out how a child i playing with sync cable.
after the first configuration the output I have all the time 5volt
on this board DIY It is the only set of the scheme given 74hc00 I'm not sure whether the input number 2 I connect the signal generator
So I tried to bring the signal on node 1 and 3 monitor so on quickly to check but no signal.
how cor- can I check these transitions (would give the trick someone draw a test)

so far I do not know where the error on the PCB there leg number 14 and 13 together?
7 interrupted connection to potentiometers?
what else can I try to see?

[starcruiser]

Are you scoping the output?

This is a NAND gate so both inputs low will provide a high output, one input high will still show a high output, both inputs will need to transition to cause an output change. So to check for operation drive both pins 1 & 2 with a square wave input (start with a lower frequency signal unless you have a scope) and monitor pin 3 for transition from high to low state. this will tell you if the chip is operating, pin 7 is ground and 14 is positive (5Vdc). Without Pin 7 & 14 connected the chip will not function.

If the circuit is built correctly and powered (5vdc) you should see something, the adjustable resistor and capacitor makes an RC network (R*C=t) R= resistance in ohms, C= Capacitance in Farads and t = time in seconds.

Check this page out to find a tutorial  http://www.electronics-tutorials.ws/rc/rc_1.html

This will help you understand the operations of the delay between stages.

remember 1/t= f  where the reciprocal of time is equivalent to frequency. So figure out the time constant for the RC network and this can tell you the operating frequency of the delay.

you can use a LED on the output with a current limiting resistor in series (protects the chip output on the stage) as long as the operating frequency is low, i.e. 5hz or so, otherwise stick with the scope.