digital volume control help

[insomartin]

OFF topic na tayo...

anyways. depende talaga sa application kung anong ginagamit na resistance, potentio, dac.. for variable voltage supplies, volume control, or what ever.... a designer might use a two ordinary pot for FINE/COURSE adjustments. or a 10 turn pot... may gumagamit nang DAC's for programmable power supplies. may gumagamit nang single chip volume control for audio mixers... meron naman iba na serial data tapos dumadaan sa DSP for post processing.

bottom line is depende sa engineer kung anong application talaga.

[reymer555]

bat ganun nung ginawa ko sya sa breadboard, may 2nog sya kaso ung sa pushbutton d nag u-up ung volume tska down ng volume.. panu un,, T.T

[nucleus]

bat ganun nung ginawa ko sya sa breadboard, may 2nog sya kaso ung sa pushbutton d nag u-up ung volume tska down ng volume.. panu un,, T.T

ito ang pangamba ko pag walang current limiting resistor, try mo muna po check yung connection nyo *verify sa datasheet then pag okay talaga try mo po mag series ng resistor sa input, tsaka anu palang value ng digital potentiometer na gamit mo

[insomartin]

bat ganun nung ginawa ko sya sa breadboard, may 2nog sya kaso ung sa pushbutton d nag u-up ung volume tska down ng volume.. panu un,, T.T

dalawa yung button...
isa is for the {clock / increment}
and isa is for the {up / down}

so meron kang dalawang buttons ok?

you have to hold or not hold the {up / button}
then press repeatedly on the {clock / increment}

now... on the first schematic diagram i showed merong inverter. yung may triangle then then invert bubble sa dulo. that is for the schematic for the TWO button up and down volume control not the {clock / increment}{up / button} control.

since mahirap maghanap nung maxim's volume control i recommended these instead. the circuit is as is working on my bread board.

[reymer555]

aahh.. pero ung bago  mung gawa na schematic? bat wala ung inverter?

[insomartin]

tinangal ko muna yung inverter for you to test muna.
then add it up to make a two button up/down volume control.
i think you're having a hard time making it work. it's better that way.

[reymer555]

aahh.. so talaga palang nid ng inverter..

[insomartin]

aahh.. so talaga palang nid ng inverter..

ah... hindi oo kailangan nang inverter para maging two button updown volume control.  

i think medyo nahihirapan ka pa sa basic electronics.
http://www.kpsec.freeuk.com/index.htm
jan ka magstart brother. concentrate ka jan sa website na yan.
almost lahat nang basic electronics and logic meron jan.
from the humble 555, cmos logic, to simple projects.

electronics takes time, little thinking and self study.
if i kept on putting spoon on your mouth, boring ang electronics.  

happy building!
-martin miranda

[reymer555]

sana nga mayroon pang tym e.. may 2 pang project na pending.. huhuhu.. may Final exam pa.. parang wla na kong tym mag review.. T.T