Monostable mode 555 timer, also called a one shot, responds to a brief low trigger voltage by giving a single high output for a period of time set by the values of the timing capacitor and it’s resistor. The output then drops back low and stays there until triggered again. It’s got one stable state (low), so it is called monostable.
Briefly pressing the button lights the LED for a period of time set by the capacitor and it’s charging resistor.
Quick 555 timer monostable one shot mode lighting an LED circuit schematic to breadboard build
Other basic 555 circuits:
- Brief NTC thermistor voltage divider circuit
- Brief DPDT relay component introduction – Double pole double throw
- Brief switch based NOT gate circuit – Logic inverter
- Quick NPN BJT switch circuit – Bipolar Junction Transistor
- Quick single switch controlled alternating flashing LEDs circuit
- Brief capacitor discharge RC time constant circuit
- Brief charging capacitor voltage ramp circuit using LM334 current source
- Brief discharging capacitor voltage ramp using LM334 current source
- Brief fixed resistor voltage divider circuit
- Brief trimmer potentiometer trimpot variable resistor voltage divider circuit fragment
- Information on this site is not guaranteed to be accurate. Always consult the manufacturer info/datasheet of parts you use. Research the proper safety precautions for everything you do.