[Help] Capacitor problem...

[cyrrah]

Tanong ko lang po sana.. meron po bang available na capaciitors na nanoFarad ang unit ng capacitance nya? kasi po wala po talaga akong mahanap dito sa lugar namin..

100nF  63V Polyester or Ceramic Capacitors
22nF  63V Polyester or Ceramic Capacitor

eto po kelangan ko. eto nalang po kulang para masimulan ko project ko. meron po ba nito? at kung wala naman po, ano po bang maari kung maipalit dito? sana po matulungan nyo ako.. TIA

[BadsTrese]

meron po nyan sister

100nF = 0.1uF
22nF = 0.022uF

pwede na po ang mylar capacitor which is widely available sa pinas. 

[dan.enriquez]

^ sir 100nF = 0.1uF = (104 sa ceramic caps.)

22nF = 0.022uF = (223 sa ceramic caps)

yung 63V kahit 100V pwede jan..

hope makatulong..

[cyrrah]

thanks sa reply.. meron pala nito. hirap kasi hanapin. isa pa pong tanong, wala po bang kaibahan kung ceramic, mylar o electrolytic gamitin ko? at about po sa voltage, kelangan po ba insaktong 63v o pwede hindi?

[BadsTrese]

saan mo ba gagamitin? pag electrolytic kasi polarize sya. Voltage mas mataas mas ok... magiging bulky nga lang.

[dan.enriquez]

thanks sa reply.. meron pala nito. hirap kasi hanapin. isa pa pong tanong, wala po bang kaibahan kung ceramic, mylar o electrolytic gamitin ko? at about po sa voltage, kelangan po ba insaktong 63v o pwede hindi?

ang alam ko tantalum lang ang merong 63V, pero polarized yun..

sa ceramic at mylar naman 50V, 100V etc. may 25 pero bihira..

63v na ceramic much better 100 na lang gamitin mo walang deperensya yun..

[JS]

104 marking ng 100nf. 223 naman kapag 22nF tapos sunod na marking is voltage rating. Like 63 is 63 volts

[JS]

Hehehe mabilis talaga laging kaharap mga pyesa.

[cyrrah]

gagamitin ko po sana sa paggawa ng full duplex intercom. hirap po kasi maghanap ng components dito sa amin. eto po yung shematic:



salamat nga pala mga bossing

[cyrrah]

eto pala parts list:

Full-duplex Intercom

P1_____________22K  Log. Potentiometer

R1_____________22K  1/4W Resistor
R2,R3_________100K  1/4W Resistors
R4_____________47K  1/4W Resistor
R5______________2K2 1/4W Resistor (See Notes)
R6______________6K8 1/4W Resistor
R7_____________22K  1/2W Carbon or Cermet Trimmer
R8______________2K7 1/4W Resistor

C1,C6_________100nF  63V Polyester or Ceramic Capacitors
C2,C3__________10µF  63V Electrolytic Capacitors
C4_____________22µF  25V Electrolytic Capacitor
C5_____________22nF  63V Polyester or Ceramic Capacitor
C7____________470µF  25V Electrolytic Capacitor

Q1____________BC547  45V 100mA NPN Transistor

IC1_________   TDA7052  Audio power amplifier IC

SW1____________SPST  miniature Switch

MIC____________Miniature electret microphone

SPKR___________8 Ohm Loudspeaker


tong dalawang capacitor nalang po kulang ko eh

[dan.enriquez]

^ oke lang sir kung jan lang gagamitin..

sa pre-amp..

[cyrrah]

thanks mga bossing.. maghahanap nalang uli ako

[dan.enriquez]

^ goodluck po sir at sa project nyo po..

[Rene]

Mga bosing meron akong old amplifier na gustong e-repair, kaso wala akong makitang capacitor dto sa abbroad na tulad ng luma. Hindi ko alam kung phase out na ito or hindi lang available dto sa Kuwait. Ang available lng dto low voltage/capacitance, pwede ba e-series ko ang dalawang capacitor to meet the desired voltage/capacitance or paano po ba? Advice lng po sana. Ang mga capacitor na hinahanap ko ay ang mga sumusunod.

6800mf/100v (electrolytic)
4700mf/63v (electrolytic)

[pedot]

meron pang ganung e caps. available pa ang mga yan.

[akosiikem]

Mga bosing meron akong old amplifier na gustong e-repair, kaso wala akong makitang capacitor dto sa abbroad na tulad ng luma. Hindi ko alam kung phase out na ito or hindi lang available dto sa Kuwait. Ang available lng dto low voltage/capacitance, pwede ba e-series ko ang dalawang capacitor to meet the desired voltage/capacitance or paano po ba? Advice lng po sana. Ang mga capacitor na hinahanap ko ay ang mga sumusunod.

6800mf/100v (electrolytic)
4700mf/63v (electrolytic)

^ meron to sir kasi common values naman. Kng wala available dyan pede ka mag parallel.
kng para sa amp power caps pwede mas mataas capacitance and voltage. Mahirap lang is ung mounting

[bravokilo]

Rene, pag pinarallel, additive yung  capacitance.  Dalawang 1000MFD becomes 2000Mfd. Dapat identical and capacitors with the same voltage rating.anddo not worry about having an exact capacity. Pitong 1000mfd  will give you 7000 Mfd.  The voltage rating remains the same.

When you series two capacitors, the voltage doubles but the capacitance cuts in half. Dalawang 1000mfd in series becomes 500mfd. If the V was 50V, it becomes 100V.  you can series-parallel. Say, you need 100V and have 50V just as in above, you can then parallel 2 sets of the one nakaseries. ayun, maging 100mfd uli but at 100 V. Get it?

BK

[bravokilo]

Cyrrah:

     The symbol used for C1 and C6 are wrong. It should be just double bar to mean no polarities. Teh arc refers to negative and the bar positive.  Since C1 and C6 are just ceramics, double bar lang but it also does not mean pos-pos. Don't worry about the V. Use the ordinary 104 na brown(ceramic). If you have the green(mylar) better yun but not needed. C6 is just an RF bypass sa power line. Kung may RF strays, ma shot out cya. C1 is just a DC isolator. You can use electrolytic here if you wish. For the IC , any cheap audio amp will work. I had a table of conversion noon. I can't locate it now. You can see the equivalent in nano, pico, micro.  you can make your own table.

               |The unit is FARAD after Faraday. But it is too large for most applications. Thus, the microfarad and micro is 1/million or a millionth, 6 zeros. nan is 9 zeros, pico is 12 zeros. Scientific notation is 10 to the 6, 10 to the 9, 10 to the 12. The reciprocals are just 10 tothe minus 6 etc...

               One microfarad therefore is 1/10 to the 6 or 1x 10 to the -6. 104 means 10 with 4 zeros. Or 5 zeros.To make is 6 zeros, it becomes .1 microfarad or .1 x 10 to the minus 6. 13 is .01 and 102 is .001 mfd.

                If we want to label it in nanofarad, since nanao is 10 to the minus 9, it is much smaller. So, microfarad + 3more zeros. .1 x 10 to the 3(.1 x 1000).that s how we get the 100 Nano.


BK