Garrett (pulse) XL 500

[reptooyep]

I changed my old CD4066 from early 70's and put a TC4066 instead, now, i have noting on all inputs of the 4066. The command signals are good (like yours).
What is the reference of the chip you use ? On ebay, i've seen HEF4066, HCF4066, CD74HCT4066 ... They should all be the same, no ?
I'm puzzled with this

[blobber]

Not sure, but I suggest to look for CD4066 or CD4016, this one I have also.

[blobber]

Better and more easy to change IC's, to use sockets.

[reptooyep]

This is the first time i don't put socket cause i never have to change ics ... To bad for me !!!
I'm getting good skills to change ics ;-)
I have a 4016 also, i'll try tomorow night.

[blobber]

Did you seen the different pictures of 4066 pin 9, with and without target? Without target, there is only a small signal.

[ripsdevala]

Good morning all,
Mr.Fred, so, all the measurement should use + pole of the batt as minus probe, right?
With that i have:
79 out -5v
78 out 2v
555 pin3 6.2v
With 555 on right side only

Please take a look from your proteous

[reptooyep]

Hi,
Are you sure of the 220pf around right 555 ? Cause my first error was 220nf instead and i did not have my 5v. I noticed that after changing 4 transistors.
The output of the charge pump is too low. Try with a smaller C value to increase frequency

[ripsdevala]

Hi,
Are you sure of the 220pf around right 555 ? Cause my first error was 220nf instead and i did not have my 5v. I noticed that after changing 4 transistors.
The output of the charge pump is too low. Try with a smaller C value to increase frequency

Why you not mention before.... Hahaa, i put 220n, my eyes.....



Now i get 2.6v.......
Bc458 and bc558 get hot.....

[ripsdevala]

Well, I was playing for a while with Proteus simulation programm. So it should look and work...

[ATTACH]37121[/ATTACH]

May i have this circuit file save?
I just make like that circuit 8n prometeus but the output is 12v ???

[reptooyep]

Why you not mention before....
Bc458 and bc558 get hot.....

We take time to help you. I don't like the way you talk. We did not hask for that because the first thing you do when it does not work is checking the values...
If your transistors get hot, they should be reversed or they drain too much current.
That's why your voltage is too low

[ripsdevala]

Sorry man, there is no expresion in a text, and im not a native english,so sorry if i offend you....Thanks
When i check again there is 470n missing to, already soldered now.
But still get hot bc557 and bc458
Got -6.2v on 555 pin3

[blobber]

Okay, I am back from work, there I have no connection.

First check all values, as reptooyep suggested!
Also look careful for any short circuits, check every solded connection with DMM!

I try to explain do make measurements too.
You have to make voltage measurements of +5V, while connecting Digital-Multi-Meter minus to battery plus and DMM plus to +5V.

But when you make measurement of -5V, you have to connect DMM minus to normal ground battery minus and DMM plus to -5V.

When you want measure the voltage supply for IC, for example 709, pin 4 is -5V, pin 7 is +5V. So you have to connect DMM minus to -5V and DMM plus to +5V, than you should read +10V.

Anyway, when you want measurements with oscilloscope, you have to use normal ground minus from battery, for your oscilloscope ground and the signal of course to your probe.

[ripsdevala]

Welcome back, thanks for the explanation, i just make prometeus circuit like yours and make +5v result on 78.... Let me do futher test.

[reptooyep]

But when you make measurement of -5V, you have to connect DMM minus to normal ground battery minus and DMM plus to -5V.

When you want measure the voltage supply for IC, for example 709, pin 4 is -5V, pin 7 is +5V. So you have to connect DMM minus to -5V and DMM plus to +5V, than you should read +10V.

Anyway, when you want measurements with oscilloscope, you have to use normal ground minus from battery, for your oscilloscope ground and the signal of course to your probe.

Hi,
I'm not agree with you Fred, the gnd of the circuit is a floating GND.
All measurement should be taken betwee the measurement point ant THE BATTERY PLUS.
Even with the oscilloscope, the GND = battery plus.
It's hard to find a failure once an error have been done, except if you change all active componment.

[blobber]

Okay, I am not sure, if this is the right way, to do measurements, but this is what I have done, for me it's work just fine.
Also my measurements with oscilloscope I have made in this way.