HELP! Intercom - Electronic Circuits Projects Diagrams Free

whoshotben · 14th February 2003, 09:44 AM

i'm making an intercom for my GCSE Electronics project, i'm completely stuck

ops: could someone please help me out, i'd be very grateful, email me at who_shot_gentleben@hotmail.com or just reply to this.

p.s. could you keep it as simple as possible

Cheers, Benji 8)

Phasor · 14th February 2003, 10:55 AM

Have a look at:
http://www.mitedu.freeserve.co.uk/Ci...io/doorint.htm

wovk · 14th February 2003, 01:28 PM

Phasor :

it's hard to get a circuit simpler of that one...
nice link!

bogdanfirst · 16th February 2003, 04:13 PM

that's right. the circuit is simple and works very fine. well you might replace the transistor and the components near it with a transformer, an increaser transformer, so you get a highter voltage for the input of the lm386, but it works better with a transitor.
another idea will be to replace the transitor and the speaker used as a microphone with an electret mic. but you will need 2 speakers and 2 mics and much more wire...........
so it is a good circuit as it is.

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14th February 2003, 09:44 AM	(permalink)
whoshotben	HELP! Intercom i'm making an intercom for my GCSE Electronics project, i'm completely stuck ops: could someone please help me out, i'd be very grateful, email me at who_shot_gentleben@hotmail.com or just reply to this. p.s. could you keep it as simple as possible Cheers, Benji 8)

14th February 2003, 10:55 AM	(permalink)
Phasor	Have a look at: http://www.mitedu.freeserve.co.uk/Ci...io/doorint.htm

14th February 2003, 01:28 PM	(permalink)
wovk	Phasor : it's hard to get a circuit simpler of that one... nice link! __________________ ============ WoVk ============

16th February 2003, 04:13 PM	(permalink)
bogdanfirst	that's right. the circuit is simple and works very fine. well you might replace the transistor and the components near it with a transformer, an increaser transformer, so you get a highter voltage for the input of the lm386, but it works better with a transitor. another idea will be to replace the transitor and the speaker used as a microphone with an electret mic. but you will need 2 speakers and 2 mics and much more wire........... so it is a good circuit as it is.