555 as Astable Operation If the circuit is connected as shown in figure below (pins 2 and 6 connected (shot)) it will trigger itself and free run as a multivibrator.

Most switch-mode power supplies rely on a PWM (pulse-width-modulated) output that is controlled via voltage feedback. A 555-timer IC can inexpensively perform PWM. The circuit in Figure 1 shows how to ...

The 555 timer outputs in astable mode, which means there is a continuous stream of pulses from pin 3 which go right into the speaker circuit. The rest of the circuit monitors the resistance of ...

In this project, we’ll place the 555 timer into its “astable mode.” Also known as an astable multivibrator or a free-running multivibrator, in this mode the IC output is a continuous signal ...

The circuit is a triangle waveform generator that uses as few parts as possible. A 555 timer IC, 2 resistors and two capacitors make the triangle wave. The IC is connected in a 50% duty-cycle astable ...

The astable mode just generates a series of pulses. The bistable mode really just exposes the internal flip flop. The monostable reacts to an input by producing a fixed output pulse.

Advanced Linear and Semtech reinvent the long popular 555 timer IC greatly extending its life and usefulness.