HI everyone!! any one hav idea how to make a simple transmitter and receiver for audio signals in my home ..to communicate with in my home..using bredboard.. Plz say me if u hav any good ideas or u have done anything lyk dat..thank u..
How to make my transmitter and receiver circuit?
Dec 13, 2006
4 Replies
Transmitter:
Connect a 12V battery, a carbon microphone and a large coil of wire in series.
Receiver: +12V ! +------O Earphone +12V \\ ! ! 10K / ! / 10K \\ ! \\ +------
1 foot Dia / 0.01U 0.01U !/ 100 turns +---!!---+----!!---+---! 2N2222 !/ ! ! !\\e -------------! 2N2222 /100K \\ ! ( !\\e \\ 100K / +--- ( +12V ! / \\ ! ! ( ! ! ! ! / === 1U ( / 100K +--- +--------- 1K \\ ! ( \\ ! ! 1U ! / GND ! ! 1K / === ! ! ----+ 4.7U \\ ! ! GND +--+--- / GND ! ! ! ! ! ! 10K / === ! GND ! \\ ! ! ! / GND ------------ ! GND
--
kensmith@rahul.net forging knowledge
Sure search for it under "phono oscillator" easy cheap works with AM or FM depending on what you build.
I also came across a dirt simple magnetic field transmitter for music during a search for something else (googledrift) can't find it now. A little more "upscale" than what Ken Smith is advocating. Instead of the carbon mike an audio amp drives a coil the size of the house.
----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
formatting link
The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----
Google "induction headphones".
Cheers! Rich
Not much joy with "induction headphones" but "induction loop" works.
formatting link
Has a representative receiver schematic
Lot of hits associated with hearing aids, classrooms and language translators, not much hard data like schematics.
Thing I came across earlier looked like it had a 60 HZ notch filter, so I wonder about hum pickup.
----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
formatting link
The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required