monty
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slipperyseal
Schematics
Would you mind to publish the schematics or the Link to the EasyEDA Project? Would be great, one can learn a lot. Thx for the Project though!
Hi! Thanks for your interest in the project. There is no schematic at the moment. This was built completely with manual nets set up in EasyEDA. But I'll have a look into sharing the project, please give me a day or two. Fundimentally though the design is quite simple (i tried to keep it that way). While there's a lot of traces, most of the SID data / adddress and other lines just go to GPIO. Even the 1 mhz clock the SIDs needs are created by setting up a divider in the AVR and this is output on a GPIO. Key switches and 7 seg display are again, just connected to GPIO. The regulators perhaps need more capacitors for be "correct", but it seems to work fine. And then there's some simple caps on the audio out. And the MIDI in, an optocouper connected to UART.
Christian, if you send me the easy EDA files I should have time to work up a schematic from them, if you don't mind.
On Wed, Oct 27, 2021, 3:20 AM Slippery Seal @.***> wrote:
Hi! Thanks for your interest in the project. There is no schematic at the moment. This was built completely with manual nets set up in EasyEDA. But I'll have a look into sharing the project, please give me a day or two. Fundimentally though the design is quite simple (i tried to keep it that way). While there's a lot of traces, most of the SID data / adddress and other lines just go to GPIO. Even the 1 mhz clock the SIDs needs are created by setting up a divider in the AVR and this is output on a GPIO. Key switches and 7 seg display are again, just connected to GPIO. The regulators perhaps need more capacitors for be "correct", but it seems to work fine. And then there's some simple caps on the audio out. And the MIDI in, an optocouper connected to UART.
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https://easyeda.com/slipperyseal/monty
Here it is :) Note the ground is a bit weird. We used two ground planes and no specific routing. So we just got lucky they all connect. I wouldn't do it that way again. Also, a recent addition was points you need to jumper by the 7 seg so you can chose between a common anode or cathode.