FM to AM converter - variation on a theme!
I noticed last week, sometime, a post about a FM/AM converter to give some new life to older AM only radios.
I thought this was a really good idea, but missed out on getting one from the member concerned.
So I thought I do my take on in. I have ordered some of the FM modules and was going to control it with an Arduino I have lying around. But these modules are going to take a while from China! In the mean time I have another unit I have been using a project over the last few months, so I decided to adapt the AM modulator/transmitter from the design published and attach this gizmo to it!
It’s a small unit that does:
Operating voltage 6-15v (10-15 ma)
Has built in FM receiver
Has a built in MP3 player (using either a micro SD card or a USB memory stick)
Has an AUX input
And has a bluetooth module built in, ideal for iPhone !
And all for under £4.00
So I breadboarded the transmitter side, added a connecter and external PSU (it was also working from 6 AA batteries with no problems). I had to change the circuit around a bit - but not to much.
It works a treat! Ive added a few photos, of the soon to be finished (ie put in a box!) version.
Derek
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