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SN76477
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dnny



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PostPosted: Sun Jan 22, 2006 11:43 am    Post subject: SN76477 Reply with quote  Mark this post and the followings unread

the talk about the SN76477 has been going too long on another topic so i think it we can move it here ...

i have made a component of SN76477 to RJWSoft schematic publisher.
it looks like this :
Posted Image, might have been reduced in size. Click Image to view fullscreen.

and its made from this original:
Posted Image, might have been reduced in size. Click Image to view fullscreen.

i have the .spt -file but the extension is not allowed to attach - if you want it i can email it

daniel

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v-un-v
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PostPosted: Mon Jan 23, 2006 3:17 am    Post subject: I'll put it here me thinks :) Reply with quote  Mark this post and the followings unread

I found one place selling SN7's. Bit steep mind (20 US bucks- but the Euro/ Pound is quite strong against the dollar)- a step in the right direction I hope? Wink

http://www.unicornelectronics.com/

do a search- and leave out the SN part (ie search 76477)

Tom

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PostPosted: Mon Jan 23, 2006 3:43 am    Post subject: 3 more places...... Reply with quote  Mark this post and the followings unread

and three more places;

http://www.1sourcecomponents.com/partinfo/sn76477.htm

http://www.usbid.com/part.cfm/SN76477

http://sklep.avt.com.pl/forums.html/?sess_id=63f821d2a41f197c55884d328abc9f5a

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PostPosted: Mon Jan 23, 2006 11:17 am    Post subject: Reply with quote  Mark this post and the followings unread

Ten Bucks apiece here:

http://www.arcadechips.com/forums.html?cPath=27_22&osCsid=2092440528c59cccfb0d7d052b0d259a

They also have some other nice hard-to-finds.

Note these are the Narrow DIP package - not the hissing cockroach sized thing that WZ mentioned earlier. Pretty sure that's what Unicorn has as well (though I might be wrong about that). They're through-hole, but much smaller spacing than standard DIP's. You'll either have to etch a PCB that it'll fit or get an adapter board. Blacet might still sell those.

Take care,
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Wild Zebra



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PostPosted: Mon Jan 23, 2006 11:38 am    Post subject: Reply with quote  Mark this post and the followings unread

Ten bones that not too bad. Thanks for the research guys.
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v-un-v
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PostPosted: Mon Jan 23, 2006 2:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

Scott Stites wrote:
Ten Bucks apiece here:

http://www.arcadechips.com/forums.html?cPath=27_22&osCsid=2092440528c59cccfb0d7d052b0d259a

They also have some other nice hard-to-finds.

Note these are the Narrow DIP package - not the hissing cockroach sized thing that WZ mentioned earlier.


ahhh- Scott nice one mate Smile 10 bucks- that's more like it! And whats an SN76488?????????????????????????!!!!!!! Shocked

I like the look of those speech synth chips too Very Happy

The 'cockroach' is the business Smile- very hard to find these days Evil or Very Mad

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PostPosted: Tue Jan 24, 2006 1:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

I picked that link up off of the DIY Stompbox a while back - really nice stuff there, haven't ordered from them yet.

I have no clue what an SN76488 is, sounds interesting....

I've got a cockroach left over from when Radio Shack (A) still sold them and (B) was still worth shopping at.

The voice chips are velly intelesting as well. Now, don't know if you've ever heard of it, but there's a voice/synth IC out now called the SpeakJet. Brice Hornback (the guy that invented the PSIM 1) sent me a sample of a Speak Jet either going through its test routine or being controlled by a PSIM - can't remember which. One of the craziest things I've ever heard...sounded to me like a drunk that didn't know whether to laugh, cry, fart or burp while attempting to dial a DTMF phone.

http://www.speakjet.com/

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PostPosted: Tue Jan 24, 2006 6:16 pm    Post subject: Reply with quote  Mark this post and the followings unread

here's a nice schematic from one of those linked sites- now we just need a good programmer....Jan? Very Happy


speakjettopc.gif
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speakjettopc.gif



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PostPosted: Tue Jan 24, 2006 6:33 pm    Post subject: Re: I'll put it here me thinks :) Reply with quote  Mark this post and the followings unread

v-un-v wrote:
I found one place selling SN7's. Bit steep mind (20 US bucks- but the Euro/ Pound is quite strong against the dollar)- a step in the right direction I hope? Wink

http://www.unicornelectronics.com/

do a search- and leave out the SN part (ie search 76477)

Tom


I built a kit with this in it, back in the 80's, for around $69 or so.
I don't know what ever became of it.

Now I wish still had it.
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Macaba



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PostPosted: Wed Jan 25, 2006 12:53 am    Post subject: Reply with quote  Mark this post and the followings unread

The speakjet looks like a MARVELLOUS chip to experiment with. I'd love to give it a go. Any UK sources?
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dnny



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PostPosted: Wed Jan 25, 2006 2:29 am    Post subject: Reply with quote  Mark this post and the followings unread

Macaba wrote:
The speakjet looks like a MARVELLOUS chip to experiment with. I'd love to give it a go.


there is a topic on DIY synths about speech synthesis.


parlax sels a Development Board and the chip for 55$ and only the chip for 25$

HVW Tech sells also speakjets one for 25$ and if you order more
10+ Units for $22.46 each.
25+ Units for $19.96 each.


for speakjet there is a program PhraseALator v1.4 (Includes 1,400 word dictionary.)

and there is a nice looking chip TTS256 (Text to Code IC for SpeakJet)
"Generate speech from ASCII text" from speechchips.com
for 13$

take a look also to speakjet.com

the SPO250 Speech Synthesis Chip from arcadechips is a lot cheaper but ... i don´t know the differences

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PostPosted: Wed Jan 25, 2006 4:46 am    Post subject: Reply with quote  Mark this post and the followings unread

It's a shame the chip can't be controlled via knobs and switches- or can it? It gets a bit beyond me here.
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dnny



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PostPosted: Wed Jan 25, 2006 1:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

v-un-v wrote:
It's a shame the chip can't be controlled via knobs and switches- or can it? It gets a bit beyond me here.


i think every thing can me moded to use knobs and switches -

the speakjet looks like this :
Posted Image, might have been reduced in size. Click Image to view fullscreen.

and the thing "we" want to tweak is the 5 Channel Synthesizer:
Posted Image, might have been reduced in size. Click Image to view fullscreen.

it can be controlled by this "Serial Control Protocol" (SCP)
which is something like this:

Quote:

Example: To set the frequency of the first oscillator to 500
Hz, 1500 Hz and 2500 Hz consecutively,
Send "\0"
Send "8J" (Set address for Envelope Control)
Send "0N" (Set Envelope Control to 0)
Send "11J" (Set address for Oscillator 1 Volume)
Send "16N" (Set Oscillator 1 Volume to 16)
Send "1J" (Set address for Oscillator 1 Frequency)
Send "500N" (Set Frequency of Oscillator 1 to 500 Hz)
Send "1500N" (Set Frequency of Oscillator 1 to 1500 Hz)
Send "2500N" (Set Frequency of Oscillator 1 to 2500 Hz)


so if someone who can write programs to PIC´s of other programmable chips could write a program that would translate the logic signals from 4051 to PIC and the PIC could control the speakjet.

there is a PCB-layout for 4051 ( 8-channel analog multiplexer/demultiplexer) circuit that can be drived from 32 inputs that can be potentiometers, sliders or CV (0-5v) inputs. and if that is not enough you can cascade these ...

so are there anyone who understand for these PIC-programming issues - and happens to have spare time?

want to know more ? take a look: SpeakJet User's Manual

i consider myself as the analog-guy, but this digital stuff is really interesting...

sorry about my crappy English's ... SpellCheck corrects the words but not the sentences Sad

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blue hell
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PostPosted: Wed Jan 25, 2006 1:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

v-un-v wrote:
now we just need a good programmer....Jan? :D


Thanks Tom, but erm ... I've decided more or less to temporarily be totally fed up up re. programming, but that's a very boring job thingy :-)

Is it really that interesting BTW to hook this chip up to a PC, or what's the idea here ?

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also .. could someone please turn down the thermostat a bit.
Posted Image, might have been reduced in size. Click Image to view fullscreen.
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PostPosted: Wed Jan 25, 2006 2:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

Interesting chip (the speechjet, not the 76477). Creates speech using 5 oscillators an a simple mixer/envelope.

If anyone is interrested, they also have an emulator here

http://www.speechchips.com/shop/item.asp?itemid=6
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PostPosted: Wed Jan 25, 2006 4:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

g2ian wrote:
Interesting chip (the speechjet, not the 76477). Creates speech using 5 oscillators an a simple mixer/envelope.

If anyone is interrested, they also have an emulator here

http://www.speechchips.com/shop/item.asp?itemid=6



hmm, but yeah, isn't that kinda missing the point? I mean a (voltage) controllable circuit-bent TI Speak and Spell- that's what we want really isn't it??? Cool

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PostPosted: Wed Jan 25, 2006 4:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

how the hell is this thing addressed? I mean on the circuit I sent in, all the address inputs are grounded and only two inputs are provided (one npn and pnp tranny). could it be swamped with the PWM output of the 5 channel synth (that dnny posted)- providing some insane random string of 0's and 1's or am I talking a lot of bollocks again?
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Macaba



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PostPosted: Thu Jan 26, 2006 1:42 am    Post subject: Reply with quote  Mark this post and the followings unread

v-un-v wrote:
how the hell is this thing addressed? I mean on the circuit I sent in, all the address inputs are grounded and only two inputs are provided (one npn and pnp tranny). could it be swamped with the PWM output of the 5 channel synth (that dnny posted)- providing some insane random string of 0's and 1's or am I talking a lot of bollocks again?


The data is sent serially into that single TRX from the computer, and feedback data is sent through the other line to the computer.
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PostPosted: Thu Jan 26, 2006 2:15 am    Post subject: Reply with quote  Mark this post and the followings unread

v-un-v wrote:
hmm, but yeah, isn't that kinda missing the point? I mean a (voltage) controllable circuit-bent TI Speak and Spell- that's what we want really isn't it??? Cool


Well I thought the emulation was a duplicate of the actual synth but it sounds really bad compaired to samples from the chip. The chip produces some nice free flowing effects. As well as the serial port, it seems to have 8bit event port + 3 control lines but it is not clear what these do.
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PostPosted: Fri Jan 27, 2006 4:40 pm    Post subject: Reply with quote  Mark this post and the followings unread

I posted this on the older thing where this got brought up too

first see this:

http://experimentalistsanonymous.com/board/topic-79-0-15.html

then download this:

http://experimentalistsanonymous.com/diy/Schematics/Full%20Synths%20and%20Drum%20Synths/Arcade%20Synthesizer.zip

above referring to an µController interface for complex sound generator ICs [or other stuff i guess]
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rubendelacosta



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PostPosted: Wed Feb 01, 2006 7:20 am    Post subject: Reply with quote  Mark this post and the followings unread

so, i saw some schematics thar used the sn76477 with resistors near the vco th slfo etc....can i insted of the resistors put on pots?so a can control the vco and slfo etc??that would be cool...but its probably too easy to be true...:\
if not...who do i control this chip?

thank you, ruben
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PostPosted: Wed Feb 01, 2006 1:17 pm    Post subject: Reply with quote  Mark this post and the followings unread

sure yeah the resistors can be variable, and the size of input capaitors [pins 17 and 21] along with series resistors dictate the range of frequency.

cool thing is that you can tap the SLF and VCO and bring them out of the IC at these points wirth a high-impedance buffer amp. i know the DSC and others do this thing, [at least with the SLF] i unfortunately do not have these schematics. pretty easy though.

see this for some idea:

http://www.electronicpeasant.com/projects/ssdrums/snare1.gif

josh
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PostPosted: Wed Feb 01, 2006 7:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

oh and if you lookat that stuff i posted about before, you see that dude uses DACs Vout pins to R-in pins. hmm.
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PostPosted: Wed Apr 12, 2006 11:44 am    Post subject: Reply with quote  Mark this post and the followings unread

Heres alittle on the SN76477 in the Delton Horn book, Music Synthesizers. I can post selections of this book if anyone is interested.
I think the meat of the SN76477 topic is here http://electro-music.com/forum/topic-9396.html


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