MN3101

[Thomas P.]

Today I've read about the new delay project on JD's site. It contains of a lot of really expensive IC's, so I searched the cataloge from my local dealer to see if he has some at a lower price than small-bear.
...i didn't find any...
Anyway the project needs a MN3102 and I'm wondering if a MN3101 works here too???
If not are there any applications (delay etc.) that can use a MN3101?
And what about a MN3008?

Thanks,
tomboy

[Mark Hammer]

It sounds a bit like red wine with meat and white wine with fish (am I the only guy who loved the Lucille Ball /Desi Arnaz movie "The Long Long Trailer"?), but...

The MN3101 goes with the MN30xx series, and the MN3102 goes with the MN32xx series.  The two series use opposite polarity grounds; positive ground for MN3101, negative ground for MN3102.

[Thomas P.]

I posted the questiones because I can get a MN3101 for 1.20€ (equal in $)!!! And a MN3008 for 8.00€. And I thought there has to be something good about it :wink:

Regards,
tomboy

[Mark Hammer]

If you can get them for that price, snap them up.  Reasonably cost-effective for what you can do with them.

[Thomas P.]

If you can get them for that price, snap them up.  Reasonably cost-effective for what you can do with them.

Well, that's what I thought
Now I only need to know what I can do with them :wink:

Regards,
tomboy

[Marcos - Munky]

Take a look at the MN3008 datasheet, you will find a reverb circuit.

[Yuan Han]

I see that for MN3102 and MN3101, the differences is that MN3102 is lower voltage. negative ground for MN3102 and positive ground for MN3101. Wouldn't it be possible if i just changed the connections to pin 1 and pin 3  ? (provided its still <10V)

reason is because i have some MN3102, and i need MN3101 (costs alot!)

Han

[christian]

You need to change the BBD chip too if you´re going to use MN3102 instead of MN3101. Like Mark Hammer said

The MN3101 goes with the MN30xx series, and the MN3102 goes with the MN32xx series. The two series use opposite polarity grounds; positive ground for MN3101, negative ground for MN3102.

You´d need to use MN32** chip as the BBD. Take the data-sheets for both series and check for the differences. You should get some pointers there. If you´re using just 9V power, you don´t need to worry about the lower voltage.

[Yuan Han]

yes, i know that 3101 is designed for 30xx and 3102 is for 32xx, but i'm thinking of using MN3102 for 30xx by just interchanging pins 1, and 3, and keeping the power voltage to be less than 9V.

possible ?

[christian]

I don´t think so. There´s also the concern of the reference voltage coming from MN310*´s pin #8 that connects to the BBD line (alltough I think you don´t need to derive it from the clock chip, but produce it yourself.

You´d better take out the John Hollis´s flanger schematic to see howl you can live without the MN310* clock chips. Use custom-built VCO and buffer it through CMOS inverters. Also cheaper than BBD clock-chips

[Yuan Han]

yep, the CD4046 PLL is cheaper and more readily available than the MN3101. but MN3101 spits out the 14/15 Vdd voltage which is well suppositely just right for the MN30xx series.

I might just try to take out the MN3101 chip inside one of my cheap china choruses, and replace it with a BL3102 chip and see what happens (inclusive of pin inversion of 1 n 3)

reason why i wanna use MN3101/2 is because i'm lazy to think, and just want to use the Infinite Flanger board that is available. I have found a couple of TDA1097s, so only problem is MN3101.

But then again, i think its most probably better to redesign the Infinite Flanger aroudn BL3207 and CD4046, because they're readily available, and with the CD4046, you can easily add in a LFO.

thanks anyway !
Han

[StephenGiles]

Why not use a 4047 if you're worried about price - see the AMS Flanger in Device on Mark Hammer's site, buffer the 4047 with the 4049 arrangement and you have almost through zero flanging!
Stephen

[Yuan Han]

yeah ......i guess at the end of the day, the price will drive for new designs based on digital chips and all........ instead of obsolete ICs....

yeap... somesort like the ultraflanger eh ? will check it out ! thanks !

[StephenGiles]

Yuan Han, have a look at this flanger which uses the 4047/4007 arrangement for the variable BBD clock. The ADA flanger clock is almost identical!
http://www.morleypedals.com/cfles.pdf
Stephen