uliza swali lolote kuhusu Electronics design na electronics kwa ujumla nikujibu!

clinical pharmacology2

JF-Expert Member
Oct 31, 2018
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1)Briefly explain the following terms;

.Transistor
.Diode

2)Why my smart phone become hot when I use it for long time??


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ymollel

JF-Expert Member
Aug 23, 2012
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Uliza swali lolote la electronics!
Kitambo sana sijakusikia humu...

Swali 1:
linahusu kucharge Lead acid battery
-ni Voltage kiasi gani na Current kiasi gani inayohitajika kuchaji lead acid battery yenye 12V, 7.2AH

Swali 2:
linahusu kucharge Li ion/Polymer battery
-ni Voltage kiasi gani na Current kiasi gani inayohitajika kuchaji Li ion/polymer battery yenye 3.7V, 2000mAH
 

Transistor

JF-Expert Member
Aug 8, 2013
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Kilo Voltage Ampere

Ni kipimo cha wattage ya transformer.

Kva=Voltage x Current/1000

Kilo = ni kipimo katika maalfu

1kilo = 1000

Hivyo VA 1000 ni sawa na kusema 1KVA

Hivyo ukiona kipimo kipo katika K maana kipo katika maalfu.

1KVA = 1000 VA
 

Transistor

JF-Expert Member
Aug 8, 2013
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Ktk transformer za tanesco. Huwa naona wameandika ...KVA. hyo KVA inamaanisha nn? (Najua kugoogle)

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Ktk transformer za tanesco. Huwa naona wameandika ...KVA. hyo KVA inamaanisha nn? (Najua kugoogle)

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Kilo Voltage Ampere

Ni kipimo cha wattage ya transformer.

Kva=Voltage x Current/1000

Kilo = ni kipimo katika maalfu

1kilo = 1000

Hivyo VA 1000 ni sawa na kusema 1KVA

Hivyo ukiona kipimo kipo katika K maana kipo katika maalfu.

1KVA = 1000 VA
 

Zugak17

JF-Expert Member
Aug 9, 2014
1,092
1,500
Kilo Voltage Ampere

Ni kipimo cha wattage ya transformer.

Kva=Voltage x Current/1000

Kilo = ni kipimo katika maalfu

1kilo = 1000

Hivyo VA 1000 ni sawa na kusema 1KVA

Hivyo ukiona kipimo kipo katika K maana kipo katika maalfu.

1KVA = 1000 VA
Kwamba 200KVA sawa na wats ngap? Au hamna uhusiano hapo?

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Transistor

JF-Expert Member
Aug 8, 2013
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Kitambo sana sijakusikia humu...

Swali 1:
linahusu kucharge Lead acid battery
-ni Voltage kiasi gani na Current kiasi gani inayohitajika kuchaji lead acid battery yenye 12V, 7.2AH

Swali 2:
linahusu kucharge Li ion/Polymer battery
-ni Voltage kiasi gani na Current kiasi gani inayohitajika kuchaji Li ion/polymer battery yenye 3.7V, 2000mAH
12v yenye 7.2ah
Chukua 7.2ah / 10h =

0.72ampere as charging current.

13.5v as charging voltage



2000mAH/3h =600mAH

Charging volage 5voltage
 

Transistor

JF-Expert Member
Aug 8, 2013
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asante ndugu pia naitaji kujua tofauti kati ya KW na KVA

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Kw = kva ( japo KW nisawa na mafuta yalio safishwa,KVA ni sawa na mafuta machafu).

Kupata KW lazma u calculate efficiency ya kifaa husika pamoja na energy loss (energy ambayo inapotea bila kufanya kazi)

Power factor ni muhimu kuicalculate kabla ya kupata KW hasa katika umeme wa AC
 

ymollel

JF-Expert Member
Aug 23, 2012
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12v yenye 7.2ah
Chukua 7.2ah / 10h =

0.72ampere as charging current.

13.5v as charging voltage



2000mAH/3h =600mAH

Charging volage 5voltage
hiyo 13.5V na hiyo 5V zinapatikanaje? au ni fixed values kwa hizo battery?
 

Transistor

JF-Expert Member
Aug 8, 2013
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hiyo 13.5V na hiyo 5V zinapatikanaje? au ni fixed values kwa hizo battery?
Kuna kitu kinaitwa rule of thumb...ambapo charging voltage hua ni battery voltage +10% ya volage yake.

3.7V =3.7v+ 10% yake
3.7v=3.7 +0.37= 4.07 round to high value = 4.5 or 5v

12v= 12v + 1.2 = 13.2 round to high volue 13.5 or 14v
 

zakayoyoung

Senior Member
Apr 9, 2019
140
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Mkuu nami tataka unisaidie hapaa

Jinsi na namna ya uziunganisha IC mbili aina ya TDA2030 ili zitoe sauti kwa pamoja katika amplifier
Maana nimetengeneza amplifier kwa kutumia IC moja ya tda2030 imetoa sauti nzuri lakini output yake imetoa watt 15 tu na ndio maana nataka nifahamu namna ya kuziunganisha IC mbili ili output itoe hata watt 35 mkuu kama unayaweza haya mambo nisaidie
 

kofuli

JF-Expert Member
Feb 9, 2019
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KUHUSU ELECTRONIC DEVICES: mobile signal booster naishi kwenye bonde kiasi kwamba mpaka sasa nipo baa mtaa wa tatu natuma hii txt ndio niende nyumbani asubuhi ndio nikute majibu ya MOBILE SIGNAL BOOSTER
 

zakayoyoung

Senior Member
Apr 9, 2019
140
225
KUHUSU ELECTRONIC DEVICES: mobile signal booster naishi kwenye bonde kiasi kwamba mpaka sasa nipo baa mtaa wa tatu natuma hii txt ndio niende nyumbani asubuhi ndio nikute majibu ya MOBILE SIGNAL BOOSTER
Tumia IC lm386 Ku create hio signal booster ni rahisi sana mkuu
 

MEING'ATI

JF-Expert Member
Feb 17, 2014
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Hii iko bomba Sema unapoteaga sana. Naomba utuekeze Tofauti ya kuwa na matatizo kwa Crt pamoja na Ic proseser ya tv
 

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