Simple Low-Cost Digital PI-1

[Georg Aster]

The test conditions are:
Pulse repetition frequency: 2000 Hz
Main delay: 20 usec
Secondary delay: 100 usec
Digital sample: Two ADC samples at each point, 10 usec apart
The samples are separated by about 10 usec.

[Serafin]

Re: Simple Low-Cost Digital PI-1

hi: georg aster you will can sendme the file exe for the pics and the pcb please for modifycate my project PI-1 opt-1

Thanks. [email protected]

(I detect one cent dollar at 23 cm in air whit my project)

[GoldFinder]

Re: Simple Low-Cost Digital PI-1

I have built the PI-opt1 and am not getting anywhere near that good of detection. Can you supply any parameters and/or modifications that are allowing that kind of good detection.
Thanks in advance.
Gold Finder

[[email protected]]

Re: Simple Low-Cost Digital PI-1

I uses news components chips and polipropileno for capacitors, resistors of 1/4W for R11 at 2W and check that regulators is 4.95 - 5.1 V and remove the jumper of ground at pin 8 of ic7.
for r2 and r3 I uses trimpots.