4_2 Schematics Discussion

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?

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

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

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?