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4_2 Schematics Discussion

Marc Dusseiller edited this page Apr 18, 2017 · 4 revisions

Discussing the schematics

how to free even more pins on that little attiny85...

updated the most recent contributions into this Schematics

Version 0.95 kinda(Final) - Updates from Uwe

More minor improvements, suggested by Uwe:

  • Add CV In 2 (cos we can)
  • No decoupling cap, or CV out is wrong
  • That thing with the switch on the Sound-prog jack.... ?
  • What kinda swtiched jack-socket is that?

Version 0.9 Towards a Final Version - small corrections...

Parts:

  • R1-4: 10K (Voltage dividers)
  • R5: 10K (Buttons to be tested)
  • R6: 4K7 (Buttons to be tested)
  • R7: 100 (NEO-Pixel data stabilizer)
  • R8: 100 (Output Filter)
  • R9-10: LED resistor (depends on color)
  • Pot1-2: 10K lin (Potentiometers)
  • C1: 100nF (SD-Prog de-coupling)
  • C2: 1uF (Output Filter)
  • C3: 100nF (Voltage stabilization)
  • C4: 100nF (de-coupling output?)

Pin Use:

  • PB0(pin5): NEO-pixels
  • PB1(pin6): Sound output (parallel LED)
  • PB2(pin7): (A1) Potentiometer (right), CV input
  • PB3(pin2): (A3) Buttons/Switch via Voltage-Dividers
  • PB4(pin3): (A2) Potentiometer (left), SD-Prog Jack-3.5mm Input
  • PB5(pin1): (A0 )kinda free pin, can be used for sync / gate signal and communication from the bootloader
  • GND(pin4):
  • Vcc(pin8): Power LED, stabilizing cap Vcc-GND.

Minimal version for other sound toys

Version 0.X by chris test

Version 0.6 & 07 updates from Chris and dusjagr

Still confused about the possibility to detect if the mini-jack is plugged using the "normally connected" part of the jack-socket?

Updated Schematics v0.7,Chris & dusjagr re-design

Parts:

  • R1-4: 10K (Voltage dividers)
  • R5: 22K (Buttons to be tested)
  • R6: 47K (Buttons to be tested)
  • R7: 100 (NEO-Pixel data stabilizer)
  • R8: 100 (Output Filter)
  • Pot1-2: 10K lin (Potentiometers)
  • C1: 100nF (SD-Prog de-coupling)
  • C2: 1uF (Output Filter)
  • C3: 100nF (Voltage stabilization)
  • C4: 100nF (de-coupling output?)

Pin Use:

  • PB0(pin5): Sound output (parallel LED)
  • PB1(pin6): NEO-pixels
  • PB2(pin7): (A1) Potentiometer (right), CV input
  • PB3(pin2): (A3) Buttons/Switch via Voltage-Dividers
  • PB4(pin3): (A2) Potentiometer (left), SD-Prog Jack-3.5mm Input
  • PB5(pin1): (A0 )kinda free pin, can be used for sync / gate signal and communication from the bootloader
  • GND(pin4):
  • Vcc(pin8): Power LED, stabilizing cap Vcc-GND.

Version 0.5 updates from Uwe

Updated Schematics v0.5, Uwe's Redesign

Parts:

  • R1-5: 10K (Voltage dividers)
  • R6: 4K7 (Voltage dividers)
  • R7: 100 (NEO-Pixel data stabilizer)
  • R8: 100 (Output Filter)
  • Pot1-2: 10K lin (Potentiometers)
  • C1: 100nF (SD-Prog de-coupling)
  • C2: 1uF (Output Filter)
  • C3: 100nF (Voltage stabilization)

Version 0.2 first prototype with etched board

Updated Schematics v0.2, dusjagr & iyok

Others: Do we need extra caps for the NEO-pixels?

Basic stuff we need

Interface:

  • 2 potentiometers
  • 2 push-buttons
  • 1 Sound output PWM (PB0 is preferred) is also CV output in case of Sequencer code
  • Sound-progger input
  • CV input
  • Master-clock or gate output
  • Sync-clock input
  • 1 pin to communicate wiht the 8 NEO-pixels (is that cheating?)
  • what else?
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