NES 500 Pi Rebuild

[jladre]

can somebody tell me what the word "bias" means
it is a marking on trimpot rv1 same on schematic

something like Offset?

Biasing in electronics is the method of establishing predetermined voltages or currents at various points of an electronic circuit for the purpose of establishing proper operating conditions in electronic components.

[WM6]

Bias is to DC preshift of voltage and current from the Zero conditions to provide correct working point of TR or IC according its characteristic. Offset could be included in bias setting.

https://de.wikipedia.org/wiki/Bias_%28Elektronik%29

[bernte_one]

can somebody tell me what the word "bias" means
it is a marking on trimpot rv1 same on schematic

something like Offset?

[jladre]

S of Q3 go to timer / oszi from Pic Controller
D goes to GND of U3 and U4 lm358 ? (maybe Timing of 1st an 2nd sample works together with U4)


btw
one good think, i dreamed last night that i had a working detector with yellow led indicator on frontpanel (it is a good sign)
i think it was the nes 500

Go! Go! Go! Bernte_one!

[bernte_one]

S of Q3 go to timer / oszi from Pic Controller
D goes to GND of U3 and U4 lm358 ? (maybe Timing of 1st an 2nd sample works together with U4)


btw
one good think, i dreamed last night that i had a working detector with yellow led indicator on frontpanel (it is a good sign)
i think it was the nes 500

[6666]

Hi bernte_one good work on new layout, Ive been trying to work out the function of Q3
it appears to be some type of switch just not sure what it does ?

[jladre]

42 views on available files and no comment?

Hi bernte_one! Have you build this detector? If yes, how do it perform? I like to build it as well the admiral pi buti donthave file on it.

[bernte_one]

42 views on available files and no comment?

[bernte_one]

ok i am fresh outa ma bathroom ready for nightlife (or my fantasy)

[bernte_one]

i have re-worked layout with sprint layout, part Placement is the same
but better holes, better copper tracks, exact part number from schematic....

can Export gerber, pdf , bw Image for all free to use like always
hope we can do it together

i made also brn pi from baron and my Impression is that he is/ or was good designer

[6666]

Found something about this

http://www.teknolojiekibi.com/yeni/index.php?topic=5970.60

[bernte_one]

yes, i do it asaiaha

[ODM]

For chronology, I think the version you start with should be included as well, bernte_one ? Please post the pcb and schematic you aim to improve.

[bernte_one]

Hello,

i am on the way to re-build the NES 500 Pi Detector.
As i know i was another Project from Baron66. (BRN Pi Digital and other Projects)

i hope i can get some help here to improove the pcb and shematic.