IO4-QuadAnalogSwitch
Quad Analog switch - 16 inputs to 4 A/D lines
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)
Download IO4-QuadAnalogSwitch copy.brd - Eagle PCB board file
Download IO4-QuadAnalogSwitch-fake.brd - Eagle PCB board file
Download eagle -
IO4-QuadAnalogSwitch Version 1.0
First built: 2021.06
Note: Experimental design, work in progress
- 1.0 - Initial version </ul
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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