Tiny Pulsdetektor 2011

[bernte_one]

has anyone build this detector the last years ?

fotos.web.de/bernd.marten2/Tiny_Pulsinduktionsdetektor

idea from here
http://www.pulsdetektor.de/projekte/projektindex.html

lets talk about it

[WM6]

has anyone build this detector the last years ?

fotos.web.de/bernd.marten2/Tiny_Pulsinduktionsdetektor

idea from here
http://www.pulsdetektor.de/projekte/projektindex.html

lets talk about it

As I remember power consuption is not realy tiny.

[bernte_one]

As I remember power consuption is not realy tiny.

but i hope in the times of cheap 18650 or 14500 li ion batteries it is no longer a disadvantage

[jon-ecm]

idk

Idk, After I built mine I saw this post and checked it out, it's a lot like the one I built,
http://www.geotech1.com/forums/showthread.php?t=17507
main difference is that mine counts the time it takes the coil falls below the reference voltage , his delays a predefined amount of time and then tests if the comparator is high or low
The main draw back of his design is that it is just using the cpu for counting time which from my experience is a mess
The attiny 15/25/45/85 series have dedicated timers that can be clocked from several hz to 85 mhz and are much more accurate
attiny 12 has a max cpu of 8 mhz and only 1 timer with a max frequency of 1.2mhz so I guess cpu was more accurate than that, but we've come a long ways!
His has a op amp which seems like a nice addition though!

Both projects share the same concept of using the analog comparator to see how long it takes
the signal to fall to near 0v (adjustable via multi turn trim pot)

this is the same md your talking about right?
http://174.132.129.189/~moreland/for...t=15143&page=2

[bernte_one]

this is the same md your talking about right?
http://174.132.129.189/~moreland/for...t=15143&page=2

----no----

the project i mean works without any microprocessors

i mean the tiny or tiny2 not the atiny

[jon-ecm]

ok my bad I just remembered the web url, I don't understand german very well...

[bernte_one]

First Test just finished soldering

here a video of the first test

http://www.youtube.com/watch?v=wH_IIfJQvtA