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View Poll Results: What would people like to see for the Talker/80 project?

Voters
13. You may not vote on this poll
  • Add speaker + amplifier to board - for cassette output sound + speak

    9 69.23%
  • Add more features - for example, PCM sound, Real Time Clock, ...

    4 30.77%
  • Make it a cartridge that plugs into a back plane extender board

    2 15.38%
  • Make it compatible with the Model 3 / Model 4

    12 92.31%
  • Make a case / enclosure for it (3D printed)

    6 46.15%
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Thread: Talker/80 - New Voice Synthesizer in the Making

  1. #41

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    Quote Originally Posted by Joe Zwerko View Post
    More advice: get a cheaper PCB supplier. My largest board, the MIRE, costs less than $6 including delivery from PCBway, with immersion gold. It's about 7" x 6.5".

    Edit
    ----
    Just realized you meant the daughter board. Yeah those can be expensive. The Ethernet on MISE/M3SE runs $20 and the FPGA module around $15.
    Yes, I do prototypes with OshPark - they are expensive but use real coppy. You get 3 PCBs ~70 $. At the same price I am getting about 50 from Seeed - they are ok too, but tin only.

    Using OshPark I wouldn't be able to sell it for 80.80 $. I have sold the extra OshPark PCBs as well, but at + 10 $. I leave it up to the builders which one to use. Cheap and China and Tin, or Expansive and USA and Copper.

  2. #42

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    Quote Originally Posted by LambdaMikel View Post
    Yes, I do prototypes with OshPark - they are expensive but use real coppy. You get 3 PCBs ~70 $. At the same price I am getting about 50 from Seeed - they are ok too, but tin only.

    Using OshPark I wouldn't be able to sell it for 80.80 $. I have sold the extra OshPark PCBs as well, but at + 10 $. I leave it up to the builders which one to use. Cheap and China and Tin, or Expansive and USA and Copper.
    PS PCB Way sounds good... I might consider that too at some point. For now, I still have a lot of Seeed PCBs that I need to use first.

  3. #43

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    Thanks to the long weekend in the US, I was able to crank out another set of three. First come, first serve!

    PS You will notice that these do not have the 22 pF crystal capacitors... this is intended and it works without them.

  4. #44

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    Quote Originally Posted by Joe Zwerko View Post
    A word of advice: buy more components than you think you're going to need. Purchased in volume, a hundred resistors or capacitors don't cost much.
    There's clearly a strong demand for Talker/80, and you'll be surprised how quickly you go through parts and PCBs.
    MISE and M3SE started out slowly too, but there are now hundreds of each "in the wild". It wasn't planned that way.
    It seems we already reached market "saturation" - this is understandable, a voice synthesizer is a rather specialized piece of equipment, and it's kind of "optional". Not as essential as an Expansion Interface or storage device. The three on eBay still available - for a week by now So I am glad that I didn't stock up on components.

    Maybe people are starting to make their own from the Github, which is highly recommended!

    Seems I need to start working on the Model 3 and Model 4 versions soon in order to reach more customers.

  5. #45

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    Arrived in one piece, will be testing tomorrow!

  6. #46

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    Quote Originally Posted by Tarkie101 View Post
    Arrived in one piece, will be testing tomorrow!
    Good to hear - eBay international shipping procedures are always a little bit obscure when it comes to tracking.
    (Still doesn't show as delivered for me).

    EDIT: OK, there is a second link... going to Hermes... and that shows delivered today.

  7. #47

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    So, given that Talker/80 sales have stalled by now (-> market saturation, hint: there are still 3 available on eBay ), I am going to work on the Model 3 / 4 version.

    There are a few changes required it seems:

    - no TRS Voice Synthesizer Mode (RAM snooping not possible)
    - the address decoder needs to signal back the ADDRESS_DECODED signal (one more line)
    - 50 pin socket instead of 40 of course
    - will people still want the expansion port passthrough? I guess though

    Question: is IO address 11 still a good one for the VS100 and the Epson / DECtalk modes?
    Question: will this also work with the Model 4p? (I don't have one)

    Also, does anybody have a pinout of the Model 3 / 4 expansion port? I am assuming they are exactly identical? I have the Model 4 TechRef somehwere, I believe the pinout is there.
    Last edited by LambdaMikel; June 7th, 2020 at 11:21 AM.

  8. #48

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    The Model 3 / Model 4 version is coming along. I will skip breadboard prototyping this time. Curious to see if it will work. Given that I do not have to support video RAM snooping this time, the address decoder is simpler, I can do full address decoding this time, and still have 3 pins left.

    talker80-m3&4.jpg

  9. #49

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    I wanted to clarify something about eBay auctions. I just had eBay remove one piece of positive (well, really negative) feedback that implied that the buyer had not gotten what he ordered. This happens because at the time when the buyer is ready to leave feedback, they are presented a potentially REVISED / UPDATED view of the auction. See, I had 2 Seeed green PCBs, and 1 OshPark PCB version to sell. First I sold the 2 Seeed ones. Every time I sold something, I used the old auction as a template and made changes. When I was ready to sell the OshPark PCB, the "DELUXE VERSION", I changed that acution more drastically, by also changing the picture and the heading. And the price is higher of course (90.90 $ instead of 80.80 $). Now THIS has the effect that folks that bought the Seeed version, at feedback time, were presented with a picture and title of the "DELUXE VERSION". Leading them to believe that they had not gotten what the ordered (the 80.80$ version instead of the 90.90$ version!) This is not the case, but a bug in the eBay feedback / auction revision / managment system. So please be aware of that when leaving feedback... check your original "Item Won" message to remind you what you bought, even if the auction has changed in the meantime. Thanks. Only one person got a OshPark PCB for the 80.80 $ price - and that was the first buyer. All subsequent OshPark DELUXE version had to pay 90.90 $.

    So, that is a hint for all eBay sellers: CAREFUL with after-sale auction revisions, if you are using them as templates as I did! Don't do it... your buyers will get confused if they haven't kept the original record.

  10. #50

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    Update - the OshPark PCBs for the Model 3 / 4 version have been fabricated, and are on the way. I should get them by Friday and will hopefully have a first version running this Sunday... fingers crossed!

    4f9cd6b1bb0df042b1320e12cf3e7e93 (Small).png

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