Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
both..actualy my frst part is to design an am transmitter which has a modulating signal input as dtmf tone and a carrier signal .... but frankly i m quite blind to strt ,, any help will b vry much appreciated...
We don't know what frequency you want to broadcast on.
There are kits and ready made modules for these circuits.
For general reference and detailed instructions I would consult the ARRL Handbook or other "radio amateur" publications.
the problem is i cannot use tcm5589n tone generator with simple base mod... i hav to modulate the incoming tone with a crystal osc using manual am.. and need to transmit it... so i m stuck how to modulate this dtmf tones using am...
AM modulation means varying the amplitude of the transmitted wave.
Your transmitter should have an oscillator, buffer stage, and output rf amplifier.
You vary the strength of the output amplifier by changing (modulating) the power (dc) supplying it.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.