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555 Timer Calculator
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Calculating time
Calculating resistors
Value of resistor R1 (kΩ):
Value of resistor R2 (kΩ):
The high time T1 (msec):
The low time T2 (msec):
Capacity of C1 (mcF):
Standard Resistor Values:
E6
E12
E24
E48
E96
Wiring Diagram
Schematic
Save calculation on the picture
4 bands resistor
The calculation is for NE555 working in an astable mode
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