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input-selector

Input Selector

  • 6x inputs
  • Mute for output
  • SPI controlled using a MCP23S17
  • Latching relays for low current draw
  • Compatible with 5V and 3V relays
  • Uses high quality Panasonic relays
  • Stackable with RCA panel and MDAC attenuator

Photos

Code

Python module is here: code/modules/input_selector.py

Schematic

Layout

BoM

Reference Quantity Value Footprint / Notes
C2, C3, C4 3 100nF 1206
C1_SMD 1 100uF Radial 10/5mm or SMD, 10V or higher
IN1-6, MUTE_IN1, MUTE_OUT1, SELECTOR_OUT1 9 1x3 Molex KK 254, Multicomp MC34 or any 0.1" socket header
J1 1 1x6 Molex KK 254, Multicomp MC34 or any 0.1" socket header
EXTRA_IO1, PWR1 2 1x2 Molex KK 254, Multicomp MC34 or any 0.1" socket header
K1-K6 6 G6JU-2P-Y-DC3 3V latching coil. e.g. Omron G6J, Panasonic AGN or Tyco IM narrow
MUTE1 1 G6J-2P-Y-DC3 3V non-latching coil. e.g. Omron G6J, Panasonic AGN or Tyco IM narrow
R1-9 12 47R 1206
RLED1 1 1K 1206
LED1 1 - 1206
U1, U3 2 ULN2003V12DR SOIC-16
U2 1 MCP23S17-E/SO SOIC 28 wide