Electronics Lab Philippines

full duplex intercom..

Offline jea921

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full duplex intercom..
« on: January 13, 2011, 11:59:57 PM »
pahelp po..may nakita ako sa net..pero di po sure kung nagana..

http://www.redcircuits.com/Page78.htm

mejo di rin po ako marunong gumawa ng schem para sa full dup..

Offline torpedo

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Re: full duplex intercom..
« Reply #1 on: June 22, 2011, 06:30:07 PM »
well ang magagawa lang natin para malaman kung gagana yan is to do it in actual..  hehe.. gud luck!!
" Victory belongs to those who believe in it the most....and believe in it the longest. " Col. James H "Jimmy" Doolittle

Offline bravokilo

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Re: full duplex intercom..
« Reply #2 on: July 11, 2011, 01:37:18 PM »
di o ma download ang schematicsd. kung ma download nyo, ple textme so i can help 0922 281 0680. dalawng ampli lang yan. marami ako dito. yung lang out of phase circuit gusto ko makita to avoid feedback.

Alam mo if you nmeed a duples intercom, buy ka 2 telephone set, put 40 volts on the line. Yun, duplex.

Kung gusto mo wireless, get a wireless phone and a phone set. put 40V and voila, wireless intercom, duplex pa.

free consultation

BK 0922 281 0680

Offline rdpzycho

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Re: full duplex intercom..
« Reply #3 on: July 11, 2011, 01:47:20 PM »
^ actually sir most modern phones can already work down to 12V, and a 24Vac ringer (kahit 'di 20Hz). :)

pero safest pa rin 'yung 24V dahil merong slightly older phones na hindi kaya 'yung mas mababa pa sa 18V.

slight modification sa 2 telephone intercom is 'yung magfi-feed ng 24Vac sa line kapag off-hook 'yung isa para mag-ring sa kabila.
‎"Divide each difficulty into as many parts as is feasible and necessary to resolve it."
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"For every difficult problem there is always a simple answer and most of them are wrong."
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Offline bravokilo

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Re: full duplex intercom..
« Reply #4 on: July 11, 2011, 05:14:44 PM »
thanks Pzycho......

Offline webscatter

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Re: full duplex intercom..
« Reply #5 on: August 17, 2011, 12:02:16 PM »
di o ma download ang schematicsd. kung ma download nyo, ple textme so i can help 0922 281 0680. dalawng ampli lang yan. marami ako dito. yung lang out of phase circuit gusto ko makita to avoid feedback.

Alam mo if you nmeed a duples intercom, buy ka 2 telephone set, put 40 volts on the line. Yun, duplex.

Kung gusto mo wireless, get a wireless phone and a phone set. put 40V and voila, wireless intercom, duplex pa.

free consultation

BK 0922 281 0680



This is true.... i was making one like this before....

Offline dummy_c

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Re: full duplex intercom..
« Reply #6 on: August 17, 2011, 10:49:18 PM »
pa subs..
The world's technology is always changing, no doubt about it, and I hope itís a while yet before it impacts my ability to tinker.

Offline amadjo01

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Re: full duplex intercom..
« Reply #7 on: August 18, 2011, 02:48:00 PM »
pa subscribe, bagong knowledge sa akin to... very nice sir BK and sir RDP...