Questions tagged [555]
The 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse generation and oscillator applications. The part is still in widespread use, thanks to its low price and ubiquity. The 556 timer is simply two 555 timers in a single package.
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How is it possible to simulate a astable NE555 that drives four other one-shot NE555 timer chips, with the main astable at 2 hours, others 30 minutes?
Introduction
One Astable NE555 together with four additional one-shot NE555 are used from a 6-volt battery array (4 batteries, each 1.5 volt) to generate low voltage signals that are then used with ...
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Made my first PCB! Does not work at all. Would like some advice
As the title says I made my first PCB. I am a physicist and have no training in design and wanted to try my best. I unfortunately made the rash choice of ordering them as they worked in simulation, ...
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What are the possible ways of producing custom sound without use of microcontroller?
I'm creating a project where I want to produce custom sound like music or of animals.
AFAIK it require at-least mainly the below components (ignoring electric components like resistors):
Battery
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Combining Two Circuits (555 timer and PIR light)
I would like to combine a battery powered PIR sensor/LED circuit with a 555 timer in monostable mode to produce light for ~2-5 minutes. The AM312 sensor is in repeatable trigger mode. With the ...
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Project Laser LED with a NE555D timer - problem with the current
I am doing a project where I have three Laser LEDs. They need to send three different signal lengths. I am doing this with three NE555D Timer, one for each signal.
The problem is: I am not coming to ...
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12V Automotive Control with 5V Logic
Background
I'm working on a personal project to control auxiliary lights on the front of a car. The lights themselves are powered directly from the battery, and are switched on using standard ...
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Verification of Clock Frequency and Duty Cycle Calculations for 2-Digit BCD Counter (555 + 4033)
I am currently designing a 2-digit BCD counter circuit using an IC 555 as the clock (Astable mode) connected to two IC 4033 (BCD Counter/Decoder) and Seven Segment Displays. I need expert verification ...
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LED chaser 555 timer in astable works only when shorted
I build a simple LED chaser that will be powered from a 9 volt battery and will start with a simple slide switch. I have simulated the design in TinkerCAD and it worked the way I wanted. However when ...
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Understanding the 555 timer's pin 3 and pin 7
I see multiple internal diagrams for the 555 timer IC. If I consider the following schematic, is the text below correct? (Also is this the correct diagram for the IC?)
Author: EEGuide.com. Link: https:...
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Sending PWM signal over Cat5
I'm trying to send PWM signal to MOSFET gate to control 12VDC 2A motor. The NE555 circuit is built as shown in this article (https://www.build-electronic-circuits.com/555-pwm-circuit/) with the same ...
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Errors in the Multisim circuit on the NE555
I'm building a circuit in Multisim and I can't get the oscillator to run at 1 kHz. Honestly, it doesn't work at all. I built the circuit but can't figure out what I did wrong.
In the finished version,...
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Correcting flaws in this 555 module for a timer
I want to simulate a push button with a little circuit. I'm using an IC 555 as a timer. The button is in another circuit (different device), pin A has 2.4 V and pin B is GND, it does activate if I ...
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Is it possible to simplify 555 delay circuit?
Is it possible to simplify the circuit by removing the logical NOTs while maintaining the identical output response to the input signal?
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What is the Longest Time I Can Set an Astable 555 Timer?
I am designing a circuit that uses a 555 timer to output a 10% duty cycle pulse train. I don't want to get into the details of what this is used on, as it is not relevant, but long story short I need ...
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Theory of dual 555 timer warbler circuit
http://electronic-projects.50webs.com/555-based-siren-circuit.htm the source online, but who knows the original designer.
U2 is configured to have a much higher frequency than U1. U2 provides the ...
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