LED Blinker Circuit Design

flux

I’ll build a hand-solderable 9V-battery LED blinker using a through-hole 555 timer in astable mode, with the switch in series with the battery, proper decoupling, and then I’ll run checks to clean up any schematic issues.

flux

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Here's a summary of what I was working on: Figuring out library needs
I need to work on a schematic and figure out the library for the NE555P, which seems like a generic part. First, I should make sure I have the right library set up before moving on to the datasheet query. After adding the part, I'll need to check the package property configuration too. It feels a bit overwhelming, but I’m just making sure I have everything lined up for a smooth process!
Use 555 timer
Set LED current
Add power hardware
Find through-hole parts
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brooks

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Project Specification
Goal
Hand-solderable 9V battery powered 555 timer circuit that blinks a red LED once per second through an on/off switch.
Key requirements
  • Power source: 9V block battery.
  • Power control: maintained on/off switch in series with battery positive.
  • Output: red LED blink rate approximately 1 Hz.
  • Construction: through-hole / hand-solderable components where available.
  • Core circuit: 555 timer in astable configuration.
Initial design choices
  • Timing target: about 1 Hz using standard 555 astable timing.
  • Candidate timing values: RA = 47kΩ, RB = 47kΩ, C = 10uF gives approximately 1.02 Hz.
  • LED current target: low single-digit mA for battery life; 1.5kΩ series resistor from 9V gives roughly 4–5 mA with a red LED.
Validation plan
  • Confirm 555 pinout and recommended astable/support components from datasheet.
  • Add through-hole parts and wire all power, ground, timing, reset/control, and LED paths.
  • Run schematic review and fix any electrical issues before moving to PCB layout.

    Goal

    Key requirements

    Initial design choices

    Validation plan

Documents

    Project Specification

    Design Validation Summary

Assets

Assets are files uploaded to this project which can be used in various ways.

9V DIP-555 Red LED Flasher thumbnail
Hand-solderable 9V battery powered 555 timer circuit that blinks a red LED once per second through an on/off switch.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$5.44–$5.54

Digi-Key

$8.74–$9.23

HQonline

$0.33

LCSC

$5.06

Mouser

$8.83

TME

$0.51

Verical

$1.88–$1.96

Controls