IO4-QuadAnalogSwitch

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Quad Analog switch - 16 inputs to 4 A/D lines

 

Download IO4-QuadAnalogSwitch copy.brd - Eagle PCB file
Download IO4-QuadAnalogSwitch-fake.brd - Eagle PCB file
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IO4-QuadAnalogSwitch Version 1.0

First built: 2021.06

An ESP32 only has 4x usable A/D lines when WiFi is also used. This board is a multiplexor for 4 banks of 4 analog inputs to those A/D lines. The initial use case is to support a preset controller for LED layout lighting that has R,G,B and W levels for Background horizon, background sky, foreground sky and suplementary lighting. (that is, 4 banks of 4 linear potentiometers each…) Usage: Set the digital outputs to select the desired bank: D C B A X 0 1 1 Bank A X 0 0 1 Bank B X 1 0 0 Bank C X 0 0 0 Bank D

(output “D” controls a diagnostic LED on the board)

Schematic
Schematic
Bot Silk
Bot Silk
Board
Board
Top Silk
Top Silk

Download IO4-QuadAnalogSwitch.gerbers.zip - Gerber Fabrication files
Download IO4-QuadAnalogSwitch.parts - Parts List (spreadsheet data)

 

IO4-QuadAnalogSwitch.bom

Parts Value Package Quantity Library Type/Feeder
R1, R2, R3, R4, R5 2K2 0603-RES 5x SPCoast 42
U2, U3, U4, U5, U6, U7, U8 74LVC1G97GW SOT363 7x SPCoast NONE
BOARD1   BOARD-DINRAIL-3.17INX10CM 1x SPCoast PTH
CON1, CON2   RJ24-INVERTED-PINS 2x SPCoast PTH
CON-AA, CON-AB, CON-BA, CON-BB   RJ45-NO-SHIELD 4x SPCoast PTH
FIDLR, FIDUL FIDUCIAL FIDUCIAL_1MM 2x SPCoast NONE
U1, UA, UB MAX4702EUE+ MAX4702EUE+ 3x SPCoast NONE
LED1, LEDAA, LEDAB, LEDBA, LEDBB Y 0603-LED 5x SPCoast 2

This technical documentation is licensed under the CERN Open Hardware Licence v1.2

Tags: eagle SPCoast