LED Blinker Circuit Design

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

flux

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

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
GND
U1 DIS - R1 P2
U1 Q - LED1 A
S1 NO - U1 VCC
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
S1
R1
Resistance
47kΩ
C1
Capacitance
10uF
U1
C2
Capacitance
100nF
C3
Capacitance
10uF
R2
Resistance
100kΩ
LED1
R3
Resistance
680Ω

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

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