Pinpointer with discrimination "Cat-FM" on ATMega328P

[void118]

Like this Marty)

[MartyJ1963]

Sounds good Void118,,,interesting project! I have nearly fnished my sprint layout so Ill post it soon for you to check it for me before I begin to build. Thanks, Marty.

[void118]

it's too big!!
at the moment I use green cap, then we will see if it fits in the casing

It was joke!!!

[void118]

Thanks guys. @Void188, I am re-drawing my pcb in Sprint layout because I am not familiar with EasyEDA. Regards, Marty.

Marty, I think I will add button to project so you can add track from one pad to PD2 and second track from pad to Gnd It will be an external button for reset, settings e.t.c

[useus]

But I'm sure that coil capacitor, I mean 33nF must be thermal stable, I can advise PolyPhenylene Sulfide ones.

it's too big!!
at the moment I use green cap, then we will see if it fits in the casing

[MartyJ1963]

Thanks guys. @Void188, I am re-drawing my pcb in Sprint layout because I am not familiar with EasyEDA. Regards, Marty.

[useus]

Thanks guys. Shall I try the 2.2uf Tantalum then instead of the electrolytic? Regards, Marty.

if you have it, you can try to see the differences. be careful not to reverse the polarity

[void118]

Thanks guys. Shall I try the 2.2uf Tantalum then instead of the electrolytic? Regards, Marty.

I suppose It won't be worse for sure)

[MartyJ1963]

Thanks guys. Shall I try the 2.2uf Tantalum then instead of the electrolytic? Regards, Marty.

[void118]

exactly, in theory the tantalum being low esr should make the circuit more stable from any jolts

May be you right friend, but I don't have such capacitors In my components, I think It's worth trying.

But I'm sure that coil capacitor, I mean 33nF must be thermal stable, I can advise PolyPhenylene Sulfide ones.

[useus]

We are talking about blocking capacitor before amplifier, I think we can use anyone because his mission Is prevent generator from S8050 base operating point constant current.

[ATTACH]55174[/ATTACH]

exactly, in theory the tantalum being low esr should make the circuit more stable from any jolts

[void118]

the best should be tantalum, when I have the pcb ready, I'll do a test

We are talking about blocking capacitor before amplifier, I think we can use anyone because his mission Is prevent generator from S8050 base operating point constant current.

[useus]

By the way, I think you can use ceramic one....

the best should be tantalum, when I have the pcb ready, I'll do a test

[void118]

Thanks Void118. I'm trying to make a smaller pcb because I don't have any copper clad board that is 100mm long. Please could you check my pcb for me when I have redrawn it? Thanks again, Marty.

Marty, I am sorry, I didn't understand you, sorry, English Isn't my native language), could you please explain me what Is It mean "copper clad board"?, yes, I can check your PCB but I'm working In "EasyEDA" environment, which one environment are you using?

[void118]

Hiya Void118, Is the 2.2UF capacitor an electrolytic capacitor or a polyester capacitor

By the way, I think you can use ceramic one....