Delta Pulse

[Darren in NC]

I know the Delta Pulse and Sniffer XR71 are almost identical. But their pcb's are designed differently. Has anyone built both designs? Is there any advantage of one or the other in regards to noise, ease of component placement, etc?

[steaua581]

Delta Pulse

Hello Forum,
I have built Delta Pulse everything works i am geting also detection on coil but the detector keeps on runnig at high trottle speed. For example if i disconect one leg at C2 i can get it slowed down i get a nice clear sharp tickling pulse sound but i can"t detect with the coil of course since C2 is disconected. Also seems that the reset buton wont reset.
Anyone got same problem and fixed how?...
any help appreciated

regards
Marius

[esus]

esus, I HAVE gave this link. why you ask me again? follow these pictures and you will build the coil
http://www.metdet.ru/GL12x12.htm

good luck

thank you KT for you re pictures
is a nice job

[esus]

hello kt
I have finished my coil 1mx1m
it works
I have some problem of instability

uses you as a connection to the disk?
for I c is a big jack


regards

[Pablete]

Help to Delta Pulse

Estimados amigos tengo un gran problema. Construí satisfactoriamente el Delta Pulse y funcionaba muy bien pero al ponerme a probar con otras bobinas al parecer hubo un corto y ya no funciona . Pido su ayuda para saber que componentes pueden haberse dañado es decir los más probables de quemarse ya que a simple vista no se nota cuales estén quemados.

Estimated friends I have a great problem. I constructed satisfactorily the Delta Pulsee and it was working very well but on having put to prove with other bobbins apparently it had shortly and already it does not work. I ask for his help to know that components can have been damaged it is to say more probable of burning since to simple sight it is not obvious which are burnt. Sorry for my bad English.
[email protected]

[geminis74]

Pablete si no has ajustado la resistencia de amortiguacion seguramente has quemado el IRF740

[Pablete]

Delta pulse

Yo ya cambie el IRF 740 y sigue calentando. Dime Geminis ¿cual es la resistencia de amortiguación? (componente exacto). Antes del corto el IRF no se calentaba para nada y funcionaba exelente.
Ahora he cambiado varios capacitadores sin exito.

[Pablete]

Muchas gracias por tu ayuda. Yo ya cambie el IRF 740 y sigue calentando. Dime Geminis ¿cual es la resistencia de amortiguación? (componente exacto). Antes del corto el IRF no se calentaba para nada y funcionaba exelente.
Ahora he cambiado varios capacitadores sin exito

[geminis74]

es una resistencia de 1/2 Watt. que esta pegada al IRF, normalmente dependiendo de la inductancia y resistencia de la bobina, se elige el valor de ella, para que no se caliente el IRF a la vez proporcione el maximo rendimiento.

is a resistance of 1 / 2 Watt. that is attached to the IRF, usually depending on the inductance and
coil resistance, we choose the value of it, so it does not heat the IRF at a time
provide the best performance.

y si no, pues ya tienes trabajo, empieza comprobando las tensiones de los integrados que sean correctas, los transistores y las conexiones de los potenciometros.

and if not, they already have a job, start checking the integrated voltages are correct, the transistors and connections of the potentiometers.

AH, utiliza la primera bobina con la que te funciono, al cambiar la resistencia

[Pablete]

Delta

Muchas gracias vamos a ver como me va.

[akademiker]

Hi there

I'm having a problem with my dp circuit.
When I turn it on, the red led turns on, the coil sends out pulses (When placing some metal inside the coil, the object starts to emit a sound) and the irf720 gets a little bit warm, but I get no sound or current at the Ameter. I tried all pots and the tuning button, but nothing worked.
When I touch Pin2 at the D9A 4066 with my finger (tried it accidentally) the speaker starts huming and when i touch Pin11 of the same or push tune, it stops again.
My coil is around 1,4mH and 4Ohm and I'm running it at 120Hz.
The whole circuit seems not to drain a lot of power, just around 100mA at 12V.
I used revision 6.0 10.2009.
Where could be the error?

[kt315]

Ameter?! you have to use MICROAMPEREMETER. 50 uA or 100 uA of full range.

[akademiker]

Ameter?! you have to use MICROAMPEREMETER. 50 uA or 100 uA of full range.

Of course I used a Ameter, which can measure mA currents, I used a multimeter with automatic range. (I thought it would be self-evident ^^)

Any idea? The sending circuit and the part for the sound seems to work fine, but something is wrong with the recieving circuit, right? Which parts are relevant for recieving?
Thanks in advance

[kt315]

which can measure mA currents

oohh my God... it's again not MILLI- but MICRO- !!!
uA!!!

[akademiker]

which can measure mA currents

oohh my God... it's again not MILLI- but MICRO- !!!
uA!!!

sorry, measured with an analog µA meter now, but same story, absolutly nothing at the µA meter, when I touch the second pin again, the meter starts to show about 90µA and slowly decreases to 0. When I hit tune while it decreases, the µA jumps up again and is decreased faster after releasing again. I'm pretty sure it has nothing to do with the meter :S