555 Timer LED Blinker Design

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I found a valid NE555P library part and will proceed with the standard datasheet astable pinout since the datasheet lookup timed out.

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Components are in place: NE555P, LED, 5 V input connector, timing parts, LED resistor, and required control/supply decoupling. I’m wiring the astable circuit now.

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Designed and wired the 5 V NE555 LED blinker schematic.
Summary:
  • NE555 astable oscillator using R1 = 1 kΩ, R2 = 680 kΩ, C1 = 1 µF for about 1.06 Hz.
  • LED output includes R3 = 680 Ω current limiting, targeting roughly 4–5 mA.
  • Added required 555 support: RESET tied to 5 V, 10 nF control-pin bypass, 100 nF local decoupling, and 10 µF bulk capacitance.
  • Added J1 as the 5 V/GND input connector.
  • ERC/review checks returned no ERROR/WARNING/UNCERTAIN items.
  • Created Board Bring-Up Plan.
Schematic is ready for layout when you want to proceed.
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U1
J1 P1 - U1 VCC
J1 P1 - U1 VCC
R2 P2 - C1 P1
J1 P1 - U1 VCC
U1 CONT - C2 P1
R1
Resistance
1 kΩ
J1 P1 - U1 VCC
U1 OUT - R3 P1
R1 P2 - R2 P1
R2 P2 - C1 P1
U1 OUT - R3 P1
R2
Resistance
680 kΩ
R3 P2 - D1 2
U1 CONT - C2 P1
J1 P1 - U1 VCC
R3
Resistance
680 Ω
R1 P2 - R2 P1
R2 P2 - C1 P1
R1 P2 - R2 P1
R3 P2 - D1 2
R2 P2 - C1 P1
J1 P1 - U1 VCC
GND
D1
GND
C3
Capacitance
100 nF
GND
C2
Capacitance
10 nF
GND
C4
Capacitance
10 µF
C1
Capacitance
1 µF
GND
GND
J1
GND
555 LED Blinker thumbnail
5 V NE555 astable timer circuit that blinks an LED at about 1 Hz with current limiting, timing network, control-pin bypass, and supply decoupling.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$0.26–$0.36

Digi-Key

$0.72

HQonline

$0.44

LCSC

$0.40

Mouser

$0.94

TME

$0.51

Verical

$0.41–$1.80

Controls