9V LED Blinker PCB


Implemented the 9V hand-solderable red LED blinker schematic using a TI NE555P DIP-8, through-hole LED, slide switch, PP3 9V battery holder, axial resistors, and through-hole capacitors. The 555 astable is set to about 1.06 Hz with ~50% duty cycle, so the LED blinks roughly once per second; electrical connectivity checks are clean.
Open items:
  • PCB layout/routing is not done yet, so airwire DRC errors are expected.
  • Generic passives have through-hole packages and values, but not exact manufacturer part numbers yet.
Suggested next steps:
  1. Assign exact MPNs for the generic resistors/capacitors if you want a manufacturable BOM.
  2. Move into PCB layout: size the board, place the battery holder/switch/LED, then route.
  3. Add silkscreen labels for battery polarity, switch ON/OFF, and LED orientation.
I can’t run PCB analysis or auto-layout because the account currently has no available ACUs.
Current state:
  • The complete 9V NE555 LED-blinker schematic is wired and electrically verified.
  • Through-hole footprints are assigned.
  • PCB placement and routing have not been verified or completed; existing airwires indicate routing is still needed, and placement likely needs optimization.
Once ACUs are available, the next operation is to inspect the board outline and current placement, automatically place or optimize components as needed, route all eight nets, then run DRC and apply any fixes.
Manual placement help
List unrouted nets
Check DRC/ERC
Set board outline

U1
BT1 + - SW1 1
R3 P2 - D1 A
R1 P2 - U1 DISCH
SW1 2 - U1 VCC
SW1 2 - U1 VCC
R3 P2 - D1 A
U1 OUT - R3 P1
R1 P2 - U1 DISCH
U1 CONT - C2 P1
R2 P2 - U1 THRES
SW1 2 - U1 VCC
SW1 2 - U1 VCC
SW1 2 - U1 VCC
SW1 2 - U1 VCC
U1 TRIG - C1 P1
U1 TRIG - C1 P1
R2 P2 - U1 THRES
U1 OUT - R3 P1
BT1 + - SW1 1
U1 CONT - C2 P1
R1 P2 - U1 DISCH
GND
C2
Capacitance
10nF
R3
Resistance
1kΩ
GND
BT1
D1
SW1
GND
R2
Resistance
680kΩ
GND
C1
Capacitance
1uF
GND
R1
Resistance
1kΩ

9V LED Blinker

9V LED Blinker thumbnail