Adding LEDs and/or Headphone output to PiratePi

[6666]

For some stupid reason I cannot edit my post above.

[6666]

Out of curiosity till the scope arrives, I built a simple circuit for the LM3915 and attached the audio output to it directly, the results was as expected, all the leds run together in case of signal(metal close to coil) and all turn off also together, no "vu" meter to indicate the strength or a ladder effect.. so I figured that if I took the signal from the audio source, I'm gonna need to measure frequency not voltage of pulses, because the voltage there is steady!! Am I right or missing something here?

Also, if there is an option to capture the signal from the audio source, is there some kind of IC to do the same as LM3915 but only triggers a single LED? I mean there is no need for 10 LEDs if they turn on and off together, right?
well it's just a though to try, until I figure out a way for a proper vu meter!!

Mike

did you configure it for Bar or Dot Display Mode ? pin 9
d

[homefire]

LOL, That schematic is missing the Levels adjustment.

[6666]

Its the schematic for the pcb in the link you showed, only 10 components plus chip, guess they are just using r3, hmmm wonder how it would go connecting it to a PIC. Darn it gotta buy one now , I bought 2.

[homefire]

Its the schematic for the pcb in the link you showed, only 10 components plus chip, guess they are just using r3, hmmm wonder how it would go connecting it to a PIC. Darn it gotta buy one now , I bought 2.

LOL, Yea I hate that. I have quite collection of CHEAPO Chines toys here now ! Yep, Gotta buy at least two knowing your going to kill at least one !!!! If you have a pressing need Buy Four !!
l

[sinclairuser]

you can also lift the meter circuit from eric's goldscan, if you look at the schematic its quite easy to reuse, i put it on a barracuda.
only real difference to the goldscan was i used one of those chinese digital meters instead of an analogue one.

[6666]

Its the schematic for the pcb in the link you showed, only 10 components plus chip, guess they are just using r3, hmmm wonder how it would go connecting it to a PIC. Darn it gotta buy one now , I bought 2.

they arrived today, well made, gotta test them.

[6666]

you can also lift the meter circuit from eric's goldscan, if you look at the schematic its quite easy to reuse, i put it on a barracuda.
only real difference to the goldscan was i used one of those chinese digital meters instead of an analogue one.

which schematic are you referencing to ?
w

[Hammerhead]

Hi,
I built this detector called "Pirate" or something, it's a Russian designed PI device, the process was fun and the results are very good, especially after several trials and errors with coil designs it showed amazing potentials compared to it's simplicity.
Now I'm looking for a way to add a LEDs vu meter, or at least just one LED to help in noisy environment. I believe I can use a LM3914 for the vu meter but I don't know how!! I also tried to play with a 2N2222 to trigger the signal right from the buzzer to a single LED also with no luck. And adding a 3.5 plug support for headphone attachment is far beyond my knowledge, as I'm still learning!!
Calling all gurus here for help, and please consider that I'm still learning

[ATTACH]42766[/ATTACH]

Mike

https://youtu.be/_fciJ-FH7CI?t=19

[Hammerhead]

https://vk.com/radiosity_ua I think this page is useful to you

[sinclairuser]

which schematic are you referencing to ?
w

hi mate sorry for the late reply, the goldscan4



I think it was this one, I used a digital meter instead but works just the same.
aly.

p.s, when you first open the gif it looks crap, but its fine if you zoom in, as a matter of fact there is a vco audio block on that scheme that can be re-used too.

[6666]

hi mate sorry for the late reply, the goldscan4

[ATTACH]43038[/ATTACH]

I think it was this one, I used a digital meter instead but works just the same.
aly.

p.s, when you first open the gif it looks crap, but its fine if you zoom in, as a matter of fact there is a vco audio block on that scheme that can be re-used too.

thanks that schematic seems to have more information on it that I've noticed before cheers

[Astromic]

https://vk.com/radiosity_ua I think this page is useful to you

wow, that's exactly what I have in mind.. As I saw he used a volt raising-measuring circuit, I don't know if it's similar in function to the LM3015 I am experimenting with!! Also strangely that "pirate" board is not similar to the one I built, I believe that one uses a micro controller (not shown clearly but I think it's an Atmel) to control signal threshold.. Also it's in Russian

Mike

[Astromic]

Guys, the scope is tacking too long to arrive and I think it's lost in shipping!!! I ordered another one and hope it make it this time.. anyways, I think I will try to add the signal converter you referred to and use the same LM3015, and get back to you with the results

Mike