Re: Covox Voice Master

Im very new to Electronics so I would need the circuit for the 5 bit ADC.

Im wondering if most Ekectronic component stores still have the ADC.

Well i will look gotta run.

Terry Raymond

On Monday, October 10, 2016, Zoran Davidovac <zoran.davidovac@gmail.com>
wrote:

> Hi There,
>
> that is actually covox speech thing (poor man DAC), I remember this very
> well since I made a few,
> even simpler version with just 10 resistors :)
>
> Covox Voice master is ADC and connects to joystick port so it would be 4
> or 5 bit ADC
>
> https://www.youtube.com/watch?v=d-BBxu3GIxE
>
> I kind a belive that atari, apple and c64 are same devices:
> http://mirrors.apple2.org.za/Apple II Documentation
> Project/Peripherals/Audio/Covox Voice Master/Photos/Covox Voice Master -
> Box.jpg
> http://www.vgmpf.com/Wiki/index.php?title=File:Covox_Voice_Master.jpg
> http://www.thepyro.com/blog/covox-voice-master/
>
> http://apple2online.com/web_documents/covox_voice_master_users_manual.pdf
>
> http://www.downloads.reactivemicro.com/Public/Apple II
> Items/Documentation/Manuals/Voice Master/Covox Voice Harp Users Manual.pdf
>
> PC versions was different so ISA coould be 8 bit ADC
> http://nerdlypleasures.blogspot.rs/2014/09/the-mysterious-
> covox-pc-sound-devices.html
>
> Regards,
>
> Zoran
>
> On 10/10/2016 10:18 PM, groepaz@gmx.net wrote:
>
>> There:
>>
>> http://kb.gr8bit.ru/KB0010/covox-circuit-diagram-643x277.png
>>
>> just put it on D0-D7 at the user port and you get a C64 covox. its a
>> really
>> really simple device, which was kinda common in the early PC days as a
>> poor
>> mans solution to digital sound output.
>>
>>
>> On Monday 10 October 2016, 20:42:19 smf <smf@null.net> wrote:
>>
>>> DAC is Digital to Analogue Convertor.
>>>
>>> The output of an 8 bit DAC will be something like (vref * value) / 256.
>>>
>>> You can build a dac out of resistors and amps or you can buy one.
>>>
>>> The covox schematics are probably available on-line somewhere.
>>>
>>> On 10/10/2016 19:01, Terry Raymond wrote:
>>>
>>>> I did a little googling and found all 8-bit platforms supported
>>>> all I could find is thus device uses an 8-bit DAC.
>>>>
>>>> Does DAC stand for:  Digital Audio Converter, which it seems this is a
>>>> small IC?
>>>>
>>>> Any ideas of possibly making such a device, circuit, all other needed
>>>> components?
>>>>
>>>> Terry Raymond
>>>>
>>>         Message was sent through the cbm-hackers mailing list
>>>
>>
>
>
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>


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