Routing and Placement Initiation

Thought for 1 sec

flux

Set Trace's active to "false"
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Set Trace's active to "false"
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Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Smart Via's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Smart Via's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Smart Via's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Smart Via's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Smart Via's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Smart Via's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Smart Via's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"
Set Smart Via's active to "false"
Set Trace's active to "false"
Set Trace's active to "false"

Thought for 5 mins 36 sec

flux

Created 36 route segments and 9 vias

Resistance

47 kΩ

Capacitance

10 nF

BT1

Capacitance

100 nF

Resistance

680 Ω

SW1

Resistance

47 kΩ

Capacitance

10 µF

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Design Notes

1 Hz 555 LED Blinker

Requirements

9V block battery input through an on/off switch.
Red LED blinks once per second.
Use hand-solderable through-hole components.

Timing calculation

555 astable period:

T = 0.693 × (RA + 2RB) × C

Chosen values:

RA = 47 kΩ
RB = 47 kΩ
C = 10 µF

Calculated period:

T = 0.693 × (47k + 2×47k) × 10µF
T ≈ 0.977 s
Frequency ≈ 1.02 Hz

This meets the once-per-second blink requirement within normal resistor/capacitor tolerances.

LED current limit

For a red LED at about 2V forward voltage from a 9V supply:

I ≈ (9V - 2V) / 680Ω ≈ 10.3 mA

Chosen LED resistor: 680Ω, suitable for a visible indicator and safe for the 555 output.

Hand-solderable component choices

555 timer: DIP-8 through-hole NE555P.
Battery input: through-hole 9V battery connector/holder.
Switch: through-hole SPST slide switch.
LED: 5mm through-hole red LED.
Resistors: axial through-hole style.
Timing capacitor: through-hole electrolytic/generic capacitor configured as 10µF.
Decoupling/control capacitors: through-hole/generic capacitors configured as 100nF and 10nF.

1 Hz 555 LED Blinker
Requirements
Timing calculation
LED current limit
Hand-solderable component choices

Reviews

Documents

Design Notes

Project Specification

Assets

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

Project Name

Description

9V battery-powered 1 Hz red LED blinker using a through-hole 555 astable timer, on/off switch, and hand-solderable components.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor	Qty 1
Arrow	$5.05–$5.14
Digi-Key	$8.68–$9.43
LCSC	$5.05
Mouser	$8.59
TME	$0.48
Verical	$1.63–$1.88

Controls

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