Building The Ultimate Delta Pulse using KT315 pcb

[sabios]

Delta pulse...

I have almost all the parts they use only the capacitor 1.5nf missing me is that I have 2 100v ...
but only I have 2 other 16v and I wonder if I can use one ...
otherwise I have the NE556 I guess it serves equal to LM556 truth.

thanks in advance.

[kt315]

16 volt caps will have to work NO PROBLEMS. will NOT working 6V, 10V, 12V. why 12v will not working - be cause very small reserve
on:::: (CAP MAXIMUM VOLTAGE) - (VOLTAGE IN THE SCHEMAMIC) = (RESERVE).
a rule is simple - YOU HAVE TO HAVE SOME RESERVE ON THE CAP VOLTAGE. 2...4...5...10 V...

[sabios]

delta pulse

for Kt ...
arme but it turns out that when I connect only 2 leds light and no sound or anything ny, revice the resistance well before welding.
my question is where is the error, if you please to help me.
just to point out that the cules use some resistance weld on the other side.

[kt315]

your english is hard to grasp for me... THE error WHERE IS? in which part is the error?
about LEDs I have wrote that this schematic was taken from internet, yes, it was working on my first DP,
I used another board then. I have to use another drop voltage indicator schematic, probably that will be in second batch, if I will make.
leave it out. do not take attention that has not the priority.

[kt315]

http://www.head-fi.org/t/82115/low-b...or-circuits/45
look post #56
LEDs part was taken from this site.

[sabios]

sorry for my bad English ...
my problem is this.

Thanks my friend... I appreciate the clarification. So why does not work, the LEDs are lit but no sound ... The red and green LED remain lit ... I think I'll do something else, I have built several Delta Pulse and none have worked. Do I review it?????

[kt315]

try to fix the sound according to those 2 diagrams. do some re-connections... on DA6 pin 4 in reference to pin 1 you have to see approx 12V=the battery voltage.
measure it.

[sabios]

Ok, then according to the diagram.
then I have to reconnect the R41, the potentiometer 10k treshold.
but the problem of LEDs that are always lit will be resolved.
and also I have to remove the VT9 as the diagram 2 ...

[sabios]

delta pulse

Hello again to tell them as new construction.
As I said in the diagram I removed the VT9 and resistance R41.
I connected the R42 to R43 ...
In doing so the sound back but is very constant and never shuts up, the meter does not work.
I measured the voltage between pin 1 and pin 6 DA6 and is 3.7 to 4.0 volts.
I do not know if I was wrong about something good is that the sound is heard.
Anyway I'm going to pass the video ...

https://youtu.be/g-wrblkMmko

[kt315]

between pin 1 and pin 6 DA6 and is 3.7 to 4.0 volts

this is AC voltage. you have to measured between pin 1 and pin 4 and see full batt voltage.

In doing so the sound back but is very constant and never shuts up, the meter does not work.

SOUND IS - ! the meter has NOT to work, yes. THOSE ABOVE ARE NOT SCHEMATICS FOR WORK,
THOSE ONLY (ONLY!!!!!) FOR THE CHECKING OF SOUND. NOTHING MORE.
the reaction on metal will be ABSENT. now make all back according to DP schematic and
try to test. check VT9 before soldering.

[sabios]

I measured the AC voltage between pins 1 and 4 of DA6 and is volteje
14 volt ...
It is a fault perhaps because remove the VT9 and R41.
And connect the R42 to R43 or perhaps this ...
Replace VT4, BC546 by 2N3904 clear that check the pinout to put it.

I checked the comment then the detector will not work alone will listen but will not detect anything then I have to be revised to make it work

[kt315]

you have to hear sound on turn on, push RESET and sound has to decrease in frequency.
it is clear indicator that SAT part DA5:A&B and sound part DA6 are OK.

[sabios]

If the sound by pressing the reset if it decreases ...
I perishes that the detector is working but get no.
Because when you step metal sounds like the sound low so I think that if you are working.
As I discuss replace the VT4 by a 2N3904 ...
What else should I check to make it work ...

[kt315]

check all logic level signals according DP_diagram.gif
I do not grip why you changed VT4. or you shoot if only to shoot anywhere -???
you have to get almost zero level on DA5:B pin7 but slightly negative, this signal is floating.
on the metal this signal goes in positive level.