Red LED Blinker Circuit Design

bryan

bryan

Make a circuit that blinks a red LED once per second.
Power it with a 9V block battery through an on/off switch.
Use components that are easy to hand-solder.

flux

0:10

Thought for 5 sec

Thought for a moment

I’ll build a hand-solderable 1 Hz red LED blinker using a 555 astable circuit, a 9V battery input, and an on/off switch. I’ll select through-hole parts, wire the datasheet-standard support capacitors, calculate the timing values, then run checks.

flux

7:46

Thought for 6 sec

Created 7 tasks.

1/7 Rename project and set description for 9V 555 LED blinker

Thought for 2 sec

Thought for 3 sec

Thought for 2 sec

2/7 Select hand-solderable 555, battery, switch, LED, and passive parts

Thought for 4 sec

Ran calculation.

Thought for 2 sec

Found 2 results for NE555P DIP-8.

Found 5 results for 9V battery snap connector.

Found 10 results for SPST slide switch through hole.

Found 1 results for 5mm red LED through hole.

Thought for 7 sec

Ran calculation.

Ran calculation.

Ran calculation.

Read NE555P datasheet for NE555P pin functions pinout astable oper.

Read LTL-307EE datasheet for LTL-307EE red LED forward voltage recomm.

Thought for 5 sec

Ran calculation.

Found 10 results for Texas Instruments NE555P datasheet pinout astable supply voltage pin 5 control capacitor reset VCC GND.

Found 5 results for Generic Resistor.

Found 5 results for Generic Capacitor.

Thought for 7 sec

4/7 Add all components with through-hole-friendly properties

Thought for 15 sec

Thought for 4 sec

5/7 Wire 9V battery switch, 555 astable, decoupling, control bypass, and LED output

Thought for 5 sec

Thought for 6 sec

6/7 Validate schematic connectivity and run ERC review

Thought for 3 sec

Completed design checks — found 19 issues.

Read schematic.

Thought for 20 sec

Thought for 16 sec

Thought for 12 sec

Thought for 23 sec

Thought for 4 sec

Completed design checks — found 11 issues.

Thought for 5 sec

Thought for 3 sec

Thought for 2 sec

Completed design checks — found 11 issues.

Thought for 10 sec

Thought for 6 sec

Thought for 4 sec

Completed design checks — found 14 issues.

Read schematic.

Thought for 5 sec

7/7 tasks completed.

Thought for a moment

Built the 9V hand-solderable 555 LED blinker schematic and documented the design in Project Specification. It uses a DIP-8 NE555P, 9V battery holder, SPST switch, 5mm red LED, through-hole resistors, timing cap, pin-5 bypass, and supply decoupling/bulk caps; calculated blink rate is about 1.06 Hz.
Validation found no remaining schematic/ERC issues; the only unresolved review items are PCB airwires, which are expected because placement/routing has not started yet. Ready to move to PCB layout when you confirm.
Set board size
Place components
Run layout DRC
Add mounting holes
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  • Generic Inductor
    Generic Inductor
    A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
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  • Generic Capacitor
    Generic Capacitor
    A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
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    1.5M
  • Generic Resistor
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9V Hand-Solder 555 Blinker

9V Hand-Solder 555 Blinker thumbnail
Hand-solderable 9V battery-powered red LED blinker using a 555 timer astable circuit, on/off switch, and through-hole support components.

Properties

Properties describe core aspects of the project.

Pricing & Availability

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Qty 1

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$5.59–$5.69

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$7.17–$7.66

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LCSC

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$0.51

Verical

$2.34–$2.39

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