ESP32 Multiplexed 7-Segment Displays

flux

0:00

Here is the system architecture I will implement in the schematic (saved in the project as the "System Architecture" property):
Diagram



  
    
  
  
    
  



""Power Domains""


""Control Core""


""Digit Switching""


""Displays""

























SPI

Digit select

SEG a-g,dp

SEG a-g,dp
















"15V IN"
"15V_RAIL"
"5V IN"
"5V_RAIL"
"3.3V IN"
"3V3_RAIL"
"GND"
"ESP32-WROOM 3.3V logic"
"Level shift 3.3V -> node_5V"
"74HC595 chain node_5V logic"
"STP16CP05 chain Constant current sinks"
"High-side P-FET x8 node_15V digit enable"
"High-side P-FET x8 node_5V digit enable"
"N-FET gate drivers x16 3.3V control"
"8x Large 2.3in digits Common anode"
"8x Small 0.56in digits Common anode (mirrored)"
Next I will:
  • Extract the small-display pinout from your Kingbright ACDA56-41SRWA-F01 PDF
  • Add the ESP32, STP16CP05, 74HC595, MOSFET switching, and the required decoupling/protection parts
  • Wire the full multiplexed + mirrored segment netlist with clear power-net labels
4 days

Added core ICs into the empty schematic

2:43

Schematic

Started: Adding core components and support passives

Using Schematic Tool.

4 days

No changes applied.

0:23

4 days

Added 6 components

0:10

Added 1x ESP32-WROOM-32 with Simplified Footprint as U7 (Pins: IO4, IO19, IO0, IO25, IO27, IO32, SHD/SD2, IO23, SDO/SD0, IO5, SCK/CLK, IO16, VDD, IO18, IO33 ... and 24 more)

Added 2x STP16CP05XTTR as U8, U9 (Pins: ~OUT11, ~OE/DM2, VDD, ~OUT8, ~OUT3, ~OUT12, R-EXT, ~OUT1, ~OUT10, LE/DM1, ~OUT4, SDO, ~OUT0, CLK, ~OUT9 ... and 10 more)

Added 2x SN74HC595DWR as U10, U11 (Pins: QH_2, QC, QE, QH_1, RCLK, SER, QB, ~SRCLR, QG, QA, SRCLK, QF, QD, GND, VCC ... and 1 more)

Added 1x SN74HCT245DWR as U12 (Pins: GND, A4, VCC, B4, ~{OE}, B3, A8, B8, DIR, B6, A7, A3, A5, B5, A6 ... and 5 more)

4 days

Task unable_to_complete.

0:11

Started: Wiring power nets and multiplex control signals

4 days

flux

0:00

Work done
  • Added core control/driver ICs: U7 (ESP32-WROOM-32), U8 + U9 (STP16CP05), U10 + U11 (74HC595), U12 (74HCT245)
Success criteria review
  • ❌ Multiplexed display + MOSFET digit switching not wired in schematic yet
  • ❌ 15 V / 5 V / 3.3 V power nets and decoupling not fully defined/connected
  • ❌ No level-shift + serial control netlist connections in place yet
Next steps I hit an issue while bulk-adding the remaining components (MOSFET arrays, passives, connectors, display placeholders) which blocked me from finishing the full schematic capture in this run. If you want, I can proceed by adding the remaining blocks in smaller batches (MOSFET digit switches first, then connectors/protection, then passives), then wire the full multiplexing netlist and run ERC/DRC checks.
4 days

Needs more info.

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