Blog

Frequency Synthesizer with only 555 Timers

Gavin_Watkins

Unfortunately I'm a bit late for the 555 Timer Madness competition, but seeing another entry (555 frequency synthesizer) inspired me to try to build a frequency synthesizer only using 555 timers. As said in that article, the 555 can be used as a VCO ...
- 4 Nov 2022
Winners Announcement: 555 Timer Madness in Honor of 50 Years of 555 Timers!

tariq.ahmad

Congratulations to robogary for Spooky Mailbox Skullies: Dusk to Dawn & dual PIR ->555 , Enables the Spook! You are the grand prize winner and you win a $200 shopping cart. Congratulations to dougw...
- 1 Nov 2022
NE555: Ring counter, Color Chase, copper wires

flyingbean

Commit to a hobby project was not as simple as I thought. My plan to Madness 555 was very simple: crafting a fun idea, using an abnormal way to implement it, sticking with the plan toward the finish line. Today is the deadline for the contest o...
- 19 Oct 2022
How to use 555 timer IC for sensor interfacing: Part-2 Wireless transmission

rsjawale24

In my last blog How to use 555 timer IC for sensor interfacing: Converting the sensor output to frequency, I showed how to convert the themistor resistance into frequency using 555 timer IC so that it can be transmitted wirelessly. In this blog, I w...
- 18 Oct 2022
Class D Amplifier TLC555 Timer Based PWM Audio Amp

AE7HD

Recreating a 555 timer based Class D PWM amplifier I first built in the '80s. Using the TLC555, a CMOS based timer that is faster than the NE555 TTL based timer.This takes advantage of the comparators in the 555 timer and uses a constant current ...
- 18 Oct 2022
Pulse Reverse Electroplating/Electroetching Using 555 Timers

AE7HD

A simple pulse reverse electroplating/electroetching controller using the 555 timer. The Arduino of its day.Two 555 timers with control over forward pulse, reverse pulse, and zero current rest time by the artful use of steering diodes and potentiomet...
- 18 Oct 2022
Dual TLC555 Capacitance Meter 0.1pF Resolution

AE7HD

Two 555 timers turn capacitance into an analog voltage readable on a DMM. With a modern 600.00mV scale, that is readable to 10e-11F. I became an avid user of the 555 timer shortly after Radio Shack started carrying the first 555 timers in the '70...
- 18 Oct 2022
555 timer Remote Capacitance Sensor - fluid level, body detector, touch sensor

AE7HD

If you want to measure capacitance for a sensor some distance away, you can't do it at the end of long wires. Just temperature changes and nearby objects will make larger changes that can swamp what you are trying to measure.This was originall...
- 18 Oct 2022
Lead battery regenerator using 555

JWx

When trying to revive degraded lead-acid battery (that were left without charging for too long and entered deep undercharge condition) old wisdom (from the times when buying new car battery was near impossible so people have gone great lengths to res...
- 18 Oct 2022
Spooky Mailbox Skullies: Dusk to Dawn & dual PIR ->555 , Enables the Spook

robogary

Hello Boils and Ghouls What do you get with a photo resistor, qty 3 555 timer ICs, qty 2 SR-HC505 PIRs, and 3 of your favorite skully friends ? A SPOOKY SCARE AT THE MAILBOX awaits your neighbors and postman. Whats unique ? E...
- 18 Oct 2022
A direct type ADC using 555 timer ICs.

Sudeep AJ

Not inspired by strb's blog. Expect setbacks and successes because I built my circuit and wrote this blog concurrently. The first thing that came to mind when I heard about creating something unusual using 555 timer ICs was a direct ADC, and...
- 17 Oct 2022
Dawn detector with hysteresis using 555

JWx

As most applications of 555 are generators/timing circuits, lets try something different. As we can see from block diagram of 555, we have two comparators (detecting voltages greater than 2/3 of Vcc or lower than 1/3 of Vcc) and R-S flip-flop. What w...
- 17 Oct 2022
Jumbo Blue 555

dougw

Intro This project started with designing a discrete bipolar transistor design that directly implements the internal circuitry of a classic NE555. After capturing the schematic I noticed other people had already built such projects, so I redesigned ...
- 17 Oct 2022
Ludicrous 555

wolfgangfriedrich

So, the humble 555 timer started its live as a bipolar IC. Technology progressed and CMOS type 555 timer chips are available now. The fastest one I could find is the Microchip “IttyBitty” MIC1555. My quest is to find out how fast it can r...
- 9 Oct 2022
Capacitance Meter Using 555 and Decade counter

vinayyn

The 555 timers were the first ever Integrated Circuits I have used in my life and learned a lot while experimenting with them by blinking LED, creating sound alarms, and timer-based Outdoor lights. After this, I used 555 timers to generate PWM to cre...
- 8 Oct 2022
How to use 555 timer IC for sensor interfacing: Converting the sensor output to frequency

rsjawale24

Contents- Blog 1: How to use 555 timer IC for sensor interfacing: Converting the sensor output to frequency Blog 2: How to use 555 timer IC for sensor interfacing: Part-2 Wireless transmission This is my project entry for the 555 timer mad...
- 6 Oct 2022
Walter June’s 555 Triangle Waveform Oscillator

scottiebabe

Soft 404
- 3 Oct 2022
Can a 555 Timer Serve as a Level Translator? Let's Find Out!

scottiebabe

Soft 404
- 29 Sep 2022
Let's Try to Create a Simple ADC based on a 555 timer!

strb

The idea to write a blog for this challenge has come into my mind almost as a coincidence. I was checking the datasheet for an attiny microcontroller, and I noticed that the particular model I have hasn't any ADC embedded into it. That's not a proble...
- 23 Sep 2022
Electronic Mosquito Repellent Circuit

davy
- 22 Aug 2022
My projects with NE555

me_Cris

Probably one of the most well-known integrated circuits, along with others such as UA741, CD4017, LM324 and so on, the NE555 timer is a versatile circuit component, relatively easy to use and configure in its monostable, astable and so on working mod...
- 20 Aug 2022
Project14 | 555 Timer Madness: Do Something Special or Unusual using 555 Timers

tariq.ahmad

In the Comments Below: Give Us Your Weird or Unusual 555 Timer Ideas! If we like your idea you could win free swag or parts to use in your project! "That 555 family was a total surprise. I wanted to make it flexible, that was the w...
- 15 Aug 2022