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mb_2069

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mb_2069 [2017/09/20 10:22] – [Precious information found about the 2069 once prototyped] antichambremb_2069 [2017/11/08 12:10] (current) – [Choices made during prototyping] antichambre
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 ==== Choices made during prototyping ==== ==== Choices made during prototyping ====
-- SPDT function added to the VCF outputs to switch between -12dB and -24dB... Of course.\\+- **2P/4P Switch**, SPDT function added to the VCF outputs to switch between -12dB and -24dB... Of course.\\
 \\ \\
-- SPDT for ByPass function... Of course too!.\\+- SPDT for **ByPass Switch**... Of course too!.\\
 \\ \\
-- Polarized caps to all audio inputs of the module, SIG1, SIG2, EXT(named like that to be clear) and 1 polarized cap on the output.\\+- **DC Offset**, Polarized caps to all audio inputs of the module, SIG1, SIG2, EXT(named like that to be clear) and 1 polarized cap on the output.\\
 I checked, with some low offset Op Amps like NE5532 or NJM4580, this is enough to maintain offset and stability in all the circuit. Then no need of big and expensive bipolar caps between stages in circuit.\\ I checked, with some low offset Op Amps like NE5532 or NJM4580, this is enough to maintain offset and stability in all the circuit. Then no need of big and expensive bipolar caps between stages in circuit.\\
  
-- Remember, I want the switching between the configuration modes digitally controllable. (MIDI, Recall...You know why ;) I try all the valid configurations, and finally choose the 4 most interesting.\\+- **Config Modes**, remember, I want the switching between the configuration modes digitally controllable. (MIDI, Recall...You know why ;) I try all the valid configurations, and finally choose the 4 most interesting.\\
  
 <WRAP group> <WRAP group>
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   * 1 logic line for 2P/4P switching, 4P at Low, 2P at High.   * 1 logic line for 2P/4P switching, 4P at Low, 2P at High.
   * 2 logic lines to code the 4 Configuration Modes.   * 2 logic lines to code the 4 Configuration Modes.
-<WRAP tip>Obviously you're not obliged to use this switching circuit. All I/O are individually accessible on pin header.\\+<wrap tip>Obviously you're not obliged to use this switching circuit. All I/O are individually accessible on pin header.\\
 You can use it to access I/O or to set it in the static configuration of your choice. You can use it to access I/O or to set it in the static configuration of your choice.
-</WRAP> +</wrap>
- +
-To be continued...+
  
 +- About the **CV inputs** of the chip:
 +I chose to use some 0 to 5V RRIO OpAmp, for precision, voltage limiting and as DAC/CV Summing(Inverter) function.
  
mb_2069.1505902928.txt.gz · Last modified: 2017/09/20 10:22 by antichambre