Whenever I use the 555 timer, it seems that the output polarity is invariably incorrect, and the way the 555 functions, it normally cannot generate a duty cycle of less than 50% — 90% yes, 10% NO!

The 555 timer IC is an integrated circuit (chip) which is used in a variety of timer, ... The output of the timer depends upon the amplitude of the external trigger pulse applied to this pin.

The 555 timer IC remains iconic and widely used. Let's explore its enduring appeal through simple, fully tested 555 projects.

The 555 timer is one of the most versatile integrated circuits available. It can generate PWM signals, tones, and single-shot pulses. You can even put one in a bi-stable mode similar to a flip flop.

It’s back! The 555 timer contest wants to see you do something cool with the 555 timer chip. At stake is the adulation of electronics geeks everywhere. Three top winners will be awarded a $15… ...

Set up: The 555 timer is set up so that when triggered by the push-to-make switch (PTM), the output (pin 3) goes high (9V) for a set time period, switching on the base leg of the NPN transistor so ...

The 555 timer chip is unpowered until a crowbar fault signal occurs. The logic-low signal forces the 74LS02 NOR gate’s output high, which provides enough power to operate to the 555 timer circuit. The ...

Each timer has an operating voltage range of 2 to 10 V, a high discharge sinking output current of 80 mA, and the same pin-out as the original chips. Supply current is typically less than 50 µA ...

Ever wanted a 555 timer with complementary non-overlapping outputs. The XTR651 from X-Rel Semiconductor is just such a thing. Very similar to the good old 555, it includes a built-in 200pF timing ...

This voltage-booster circuit for driving one or more white LEDs uses a 555 timer as its main element (see the figure). The timer, IC1, functions as a resettable astable multivibrator where R1, R2 ...