LED Blinker Circuit Design

Thought

flux

Connected U1:R to U1:VCC
Connected S1:NO to U1:VCC
Disconnected U1:R from U1:VCC
Disconnected S1:NO from U1:VCC

Thought

flux

Updated to: "9V NE555 1 Hz LED Blinker (Through-Hole)"

Thought

flux

Work done

Added the full through-hole blinker schematic: U1 (NE555P), BT1 (9V snap), S1 (SPST toggle), LED1, timing parts R1, R2, C1, LED resistor R3, and decoupling/bulk caps C2, C3.
Wired astable operation: U1 R tied to VCC, TR tied to THR, DIS with R1/R2, and C1 to GND.
Wired power + decoupling: BT1 -> S1 -> U1 VCC with C2 and C3 to GND.
Wired LED output (high-side drive): U1 Q -> LED1 anode; R3 from switched +9V to the LED anode; LED1 cathode to GND.

Success criteria review

✅ Functional 9V battery powered NE555 astable LED blinker schematic is fully built and wired
✅ All parts are through-hole / hand-solderable footprints
✅ Includes decoupling (C2) and bulk (C3) capacitance, plus LED current limiting (R3 = 680Ω, about 10 mA nominal)
❌ Timing is currently ~0.58 Hz (with R1=47kΩ, R2=100kΩ, C1=10uF), not 1 Hz

Next steps To hit ~1 Hz, I can update the timing network (e.g., change C1 to 4.7uF or adjust R1/R2). Tell me if you prefer changing one capacitor (simplest) or resistor values (keep 10uF).

GND

U1 DIS - R1 P2

U1 Q - LED1 A

S1 NO - U1 VCC

U1 TR - U1 THR

U1 R - U1 VCC

U1 Q - LED1 A

S1 NO - U1 VCC

BT1 P - S1 COM

U1 TR - U1 THR

S1 NO - U1 VCC

GND

S1 NO - U1 VCC

GND

U1 R - U1 VCC

U1 DIS - R1 P2

GND

U1 TR - U1 THR

S1 NO - U1 VCC

U1 R - U1 VCC

U1 TR - U1 THR

BT1 P - S1 COM

U1 DIS - R1 P2

S1 NO - U1 VCC

GND

BT1

Resistance

47kΩ

Capacitance

10uF

Capacitance

100nF

Capacitance

10uF

Resistance

100kΩ

LED1

Resistance

680Ω

Reviews

Generic Inductor
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Generic Capacitor
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Generic Resistor
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700.5k

Project Name

Description

9V NE555 1 Hz LED Blinker (Through-Hole)

Properties

System Ar…itecture

Pricing & Availability

Distributor	Qty 1
Arrow	$0.35–$0.45
Digi-Key	$5.49–$5.98
LCSC	$3.67
Mouser	$6.72
TME	$0.48
Verical	$7.42–$14.31

Controls

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