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Open 555 Oscillator Example
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X
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Y
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G
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A
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P
Add Wire
W
Add Bus
B
Add Net Label...
L
Add Junction
J
Add No-Connect Flag
Q
Add Hierarchical Sheet
Inspect
Electrical Rules Checker (ERC)...
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Bill of Materials (BOM)...
Highlight Net (Probe)
Oscilloscope Simulation
Tools
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Help
About KiCad Web Eeschema
Reset 555 Oscillator Circuit
Grid:
50.0 mil (1.27 mm)
25.0 mil (0.635 mm)
10.0 mil (0.254 mm)
1.0 mil (Fine)
Off (Free)
Example:
555 Astable Oscillator
Inverting Op-Amp
Transistor Relay Driver
Blank Sheet
mm
Close
555 Astable Oscillator
Active
Oscillation Frequency:
1.44 Hz
High Time:
480 ms
| Low Time:
210 ms
Duty Cycle:
69.6%
(Simulated)
Open Oscilloscope
Check Rules (ERC)
Interactive Simulation & Oscilloscope (555 Timer)
D1 Output LED:
×
CH1 (Yellow):
Pin 3 (OUT) Square
CH2 (Cyan):
Pin 2/6 (C1 Voltage)
Double-click R1, R2, or C1 on canvas to change values and watch the oscillator waveform adapt in real time.
2x Speed
1x Speed
Tool:
Select
X:
0.00 mm
Y:
0.00 mm
dx:
0.00 mm
dy:
0.00 mm
Highlighted:
Grid:
50.0 mil
Zoom:
100%
Sheet:
1/1 [Root]
Choose Symbol
×
R (Resistor)
Library: Device
A standard unpolarized resistor symbol.
Electrical Rules Checker (ERC)
×
Checking schematic...
Re-run ERC
Severity
Item / Net
Description
Location
Netlist Viewer & Exporter
×
KiCad S-Expression
SPICE Netlist
Interactive Net Tree
Generating netlist...
Bill of Materials (BOM)
×
Item
Qty
References
Value
Footprint
Description
Annotate Schematic
×
Scope:
Entire schematic (sequential numbering for all symbols)
Keep existing annotations, number unassigned (e.g. R? -> R4)
Re-annotate all symbols sequentially (X-Y geometric order)
Clear all annotations (reset all symbols to R?, C?, U?, etc.)
Symbol Properties
×
Reference Designator:
Value / Model:
Footprint:
Orientation:
0°
90°
180°
270°
Net Label Properties
×
Net Name:
Page Settings & Title Block
×
Title:
Company / Author:
Revision:
Date:
Sheet Size:
A4 (297 x 210 mm)
A3 (420 x 297 mm)
Letter (8.5 x 11 in)
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