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Tools
555 timer
555 Timer Calculator (astable, monostable)
Calculate frequency, duty cycle and pulse width of a 555 from R and C.
Premium
More tools
All tools
Ohm's law
Voltage, current, power
LED resistor
Resistor by LED color
Voltage divider
Suggests R1/R2 for a target
Battery life
Including sleep current
Op-amp gain
Inverting, non-inverting
Color code
3–6 bands, both ways
