Delta Pulse

[davros]

how about steel wool ? been using that idea for 40 years if you are talking about the copper to solder

[mohandes]

Some things are just plain wrong. Using gasoline to clean a PCB is one of them.

Ethyl Alcohol is best. And then if you have any left over, you can drink it mixed with your favorite beverage... enjoy it along with your favorite tobacco substitute.

Don't try that with gasoline.

to clean by gasoline last time and to fire. burn it out. with a residue. i can not see calmly a trash (

thanks guru
but i ask you and i try yet this part ver.6 dp.JPG ,so i think my problem here,but yet not found.i have a new board like turkey again tomorrow .
regards

[aaksts86]

I replace ne556 ... and not working


test all soldering connection ... all ok ...

If no pulse at TR2, the fault could be in the 556 and its associated components.
Neither will have pulses in TR3, TR4, and TR5.
Jose

[Jose]

I replace ne556 ... and not working


test all soldering connection ... all ok ...

In the distance, we can only suggest possible solutions.
If we have no pulse TR2, obviously comprises the step and its associated circuitry 556, do not work.
This step will not work if lefalta feeding, which is the first thing to check, it often happens that for some reason opens one of the diodes D8 and D9, lacking the tension "-E".
Check the voltage on pin 7 and 14 of the 556 "-E" and nearby components.
Jose

[kt315]

Folks, how much pcs (amount) of boards I have to order to be enough? 10? 20? 50??

[g.s]

kt315 YOU try the pcb YOUR .. works...and which are the results YOU..

[kt315]

kt315 YOU try the pcb YOUR .. works...and which are the results YOU..

3 metres depth 15cm x15cm gold plate, eah? or 5??...

[mohandes]

Mohandes,
To reduce the delay, is 1 nF C4, R7, 10 K. C6 can be reduced and the potentiometer "SENS" for better control of the second sample.
Tensions in D5 pin 1 and 7 alrrededor fluctuate from 0 Volts.
Same for D7 on pin 1 and 7.
When metal is close to the coil, the voltage at pin 1 of D7, increases towards negative. The voltage at pin 7 of D7, increases towards positive, more than 4 volts if the object is large.
In turn, the voltage at pin 7 of D8 (555) increases to over 3 volts negative.
regards

thanks jose
but i need more help
regards

[g.s]

the my own Turns out gold deposit xa xa xa.......

[Jose]

thanks jose
but i need more help
regards

mohandes, send me a photo taken with the oscilloscope, the waveform at point "A" of the scheme, to compare with my DP. (ver.6 dp.JPG)

[aaksts86]

tnx .... i fixed problem


dead 1N4148


Changed 1N4148 .. but after 30min burned down again :/


maybe can be replaced with a better diode?

In the distance, we can only suggest possible solutions.
If we have no pulse TR2, obviously comprises the step and its associated circuitry 556, do not work.
This step will not work if lefalta feeding, which is the first thing to check, it often happens that for some reason opens one of the diodes D8 and D9, lacking the tension "-E".
Check the voltage on pin 7 and 14 of the 556 "-E" and nearby components.
Jose

[Jose]

tnx .... i fixed problem


dead 1N4148


Changed 1N4148 .. but after 30min burned down again :/


maybe can be replaced with a better diode?

Generally these diodes are burned during rehearsals, when we make a short circuit.
Disconnect the coil and measure the total consumption, the value should be 40 to 50 mA if all is well.
If burned during power up, the cause could be very high value capacitors C7 and C8.
Normal for C7 and C8 is 1000 and 10 mF.
Can utizar other diodes, but it is preferable to find the cause.
Jose

[mohandes]

mohandes, send me a photo taken with the oscilloscope, the waveform at point "A" of the scheme, to compare with my DP. (ver.6 dp.JPG)

okyellow is D9-11 and blue is D7-2


please measure by multimeter D10 out put pins and D7-2,3,1,6,7 and put it here (when coil connected do this please )
regards

Edit : i have 10volts on 555-3 and it is dc voltage ( is line wave not square wave or..wave )
regards

[Jose]

okyellow is D9-11 and blue is D7-2
[ATTACH]27480[/ATTACH][ATTACH]27479[/ATTACH]

please measure by multimeter D10 out put pins and D7-2,3,1,6,7 and put it here (when coil connected do this please )
regards

Edit : i have 10volts on 555-3 and it is dc voltage ( is line wave not square wave or..wave )
regards

Delta Pulse, Automatic Mode, coil connected away from all metal.
Oscilloscope vertical sensitivity 10 mV per frame.
Photo
Signal in "D9 pin 11".
Signal in "D9 pin 2" .
Signal in "D10 pin 2".


Tensions in D7:
Pin 2, 58 mV
Pin 1, 5-10 mV negative.
Pin 7, 100-400 mV positive.


In my opinion, the integrator does not work or missing some or Tr5; Tr4 pulse, can be a key 4066.
luck
Jose

[kt315]

added some copper pour and cutout at SENS pot pads. check.