Electronic and Electrical Club

[aruna1]

machan mata oni wela thienawa cercit ekaka podi wadakata hlp 1 dennako.

mekayi wenni oni

meka wenne slt lage brod band tp ekaka sound ahena twiterayen me wade gannayanne eken sadde aheddi switc ekak on wenna onii.ayi of wunama eka off wenna oni.
twiter ekata ena line eke 24v da koheda enawa machan.
but ring yana widihata kadi kadi enne ithin mata oni kohoma hari rings yanakotama switch eka onwela rings gihin iwara wunama off wenna.
puluwanda help karanna lokudeyak machan.


aa thawa 24v to 12v karanna cerkit 1kuth onii



help plceeeeeeeeee

seems easy, but i'm busy these days. I'll try to cook something as i have a free time.

please re post your description clearly. its little hard to get required data from your description.

ekko english walin නැත්තම් සිංහල වලින්. dont use both

 

[sudu pusa]

මචන්ලා මට 2N3055 එක ට්‍රාන්සිස්ටරයක් යූස් කරලා 6V වලින් වැඩ කරන්න පුලුවන් ඈම්ප් එකක් තියෙනවනම් දෙන්නකෝ

 

[nagaya]

machan mata oni wela thienawa cercit ekaka podi wadakata hlp 1 dennako.

mekayi wenni oni

meka wenne slt lage brod band tp ekaka sound ahena twiterayen me wade gannayanne eken sadde aheddi switc ekak on wenna onii.ayi of wunama eka off wenna oni.
twiter ekata ena line eke 24v da koheda enawa machan.
but ring yana widihata kadi kadi enne ithin mata oni kohoma hari rings yanakotama switch eka onwela rings gihin iwara wunama off wenna.
puluwanda help karanna lokudeyak machan.


aa thawa 24v to 12v karanna cerkit 1kuth onii

help plceeeeeeeeee

u can use a T/F or/and optocoupler to the telephone line and some simple timer circuit or so
DTMF will be a good choice too

 

[nagaya]

According to my knowledge we have in Sri lanka... but I think it will be little bit difficult to find.. But try you will find..

i tried to design a one with 555/2N3055 coz i thought i couldn't find one in SL.
do you know good link to learn about SMPS?

 

[nagaya]

available in pettah at asian electronics or unitech tradings

thnxxx bro i'll check when i go to CMB what SMPS ICs u've got from them? prices? may ebay will be cheaper than travelling to CMB thnx a lot for info bro

 

[naveenenushan]

u can use a T/F or/and optocoupler to the telephone line and some simple timer circuit or so
DTMF will be a good choice too

ane machan wadiya owa gana danne na kiyapanko kohomada oka karanne kiyala

 

[aruna1]

thnxxx bro i'll check when i go to CMB what SMPS ICs u've got from them? prices? may ebay will be cheaper than travelling to CMB thnx a lot for info bro

i have used
LM2576 - 60 rupees
LM2596 - 60 rupees
MC34063 - 30 rupees
TL434 - 30 rupees

ane machan wadiya owa gana danne na kiyapanko kohomada oka karanne kiyala

I have rough idea on what to do but there are some un clear points in your description. i believe this can be done with a peak detector or may be with 555 timer and should be able to combine two methods and built some thing more solid. if you can wait few says i will give you a design. meanwhile measure the maximum delay between two rings (beeps or what ever sound of your twitter) and let me know.

 

[aruna1]

i tried to design a one with 555/2N3055 coz i thought i couldn't find one in SL.
do you know good link to learn about SMPS?

as you can see I'm using a smps in this one
http://www.elakiri.com/forum/showthread.php?p=11908322#post11908322

 

[wpmanoj]

eletronic gana danum tikai
12 v car batr ekata mama led 4k shrenigathawa sambanda kala but ewa pichchuna why?

 

[sen10]

eletronic gana danum tikai
12 v car batr ekata mama led 4k shrenigathawa sambanda kala but ewa pichchuna why?

LED ekaka samanya Voltage eka 2v ...Enisa 12v Battry ekakta srenigatawa set karanawanam aduma gane LED 6k wath tiyenna ona machan....Samataragatawa danna epa !

 

[wpmanoj]

LED ekaka samanya Voltage eka 2v ...Enisa 12v Battry ekakta srenigatawa set karanawanam aduma gane LED 6k wath tiyenna ona machan....Samataragatawa danna epa !

thanx

 

[Iron Monger]

 

[Iron Monger]

 

[aruna1]

this is called a joule thief. it is a boost converter

 

[bwijetunga]

NIce post

 

[sudu pusa]

electronic

 

[sudu pusa]

220v

 

[nidarsha91]

ela ela niyama wadak .igena ganna puluwan meken apitath

 

[I'ts My Style]

ඉලෙක්ට්‍රොනික් කියන්නේ ඇත්තටම මාර වින්දනයක් ලබන්න පුළුවන් විෂයක්. ඒ වගේම තමන් කරපු නිර්මාණයක් එක්ක ලබන සතුට මම හිතන විදියට වෙන මොනම ක්‍රමයකින්වත් ලබන්න බැ.

 

[nagaya]

i've posted this and built this,working well,but heat losses is high,
better to use SMPS