Receiver IC's

[Nightz]

Hello,

I've been searching through some of the DIY FM Receiver threads and it looks like most of the designs rely on IC's that can be hard to find and are not readily availbale (older dated chips). Does anyone know of any IC's that are "newer" and easier to get?

Looking for these:
1. FM single conversion narrowband receiver IC
2. FM dual conversion narrowband IC
3. AM receiver IC

My application is low power.

Thanks,
-Rocko

[Bruce Abbott]

There are no 'newer' chips because the communications industry has changed from analog to digital. Manufacturers are still producing older chips, but you may need a cross-reference to get the equivalent part number. For example, the New Japan Radio NJM2591 is a replacement for the Toshiba TA31136.

There are a few suppliers who still stock older chips, eg. Futurelec (http://www.futurlec.com/ICSFMotorola.shtml) have many Motorola parts. Alternatively you could try spare parts suppliers, eg. NOKIA TA31136 ORIGINAL CELLULAR PART (http://www.airseausa.net/pd_4349694.cfm).

Parts can often be found in surplus equipment such as analogue cellphones, pagers, wireless keyboards/mice, radio controlled toys or other rc receivers. Often these things are discarded because they are redundant or faulty, but still have lots of goodies in them!

[Nightz]

Bruce,

Thanks for the reply. I guess that's what I meant but didn't say :o. Maybe thats why this thread has been so quiet. I should have also given examples of what I could not find.....like the 31136 and MC3362.

I should have asked for cross references or relevant numbers to search for.
Since the post I have also found some info on the TDA7021 as well.
My concern was going through a design process and then not being able to find IC's to make more.

My goal was a small Rx with integrated two channel ESC (driving two motors).

Thanks,
-Rocko

[Pgarrett]

I have lots of TDA7021 FM receiver chips on hand plus the schematic and PC boards which I will to free if you can use them...all new stuff, never been used...Actual receiver weight is 3 grams ready to go...4 channels for servos..
I have the software for Magnetic actuators but no Pic-chips on hand to
load the software into...
Paul

[yctseng]

Have you try the SL5018 (from KODENSHI AUK Corp)

[Acetronics]

Hi, Rocko

Did you had a look to the old National LM1872 ???

40 years ago such receiver took place on a 25 x 35 mm board ( 2 prop and 2 digital outputs ) ... and, of course SMD did not exist !!!

Alain

[Nightz]

All,
I was trying to make an all in one 4 channel RX, two channel ESC.
I was able to finish my "proof of concept" using a four channel GWS RX and two 10A Brushed ESC's. If I do anythign else with this, I'll make my own two channel ESC and just buy more cheap 4 channel receivers.

Thanks for your help.

-Rocko