---
date: 2025-04-01
title: doin' it all with 555s
desc: For April First, a guide to replace everything with 555 ICs.
tags: analog humor
cats: hw gem
img: ./555.avif
---
# Doin' It With A 555: One Chip to Rule Them All
![555 IC](./555.avif "The venerable 555 IC (Swift.Hg, Wikimedia Commons)")

Humans and other foreign species, __welcome__ to the most groundbreaking revelation in recent electronics history. For decades, engineers and hobbyists alike have believed, __unquestioning__, in the supremacy of microcontrollers, op-amps, transistors, and all those other fancy components -- only for me to tell you they can be replaced with __555 timer__ ICs. _Every single one_.

Today, on this most __auspicious__ and __interesting__ of April 1^st^s since [the summer of 1971](https://en.wikipedia.org/wiki/555_timer_IC#cite_note-Redesigning-8 "The first design for the 555 was reviewed in the summer of 1971") -- April 1^st^, 2025 -- I present to you the definitive guide to replacing all components with a __555 timer__. Prepare to be amazed, baffled, and (my hope is) not horrified by the sheer __brilliance__ of this approach.

To begin, I'd like to remind you that for __decades__ you have been played for __absolute fools__ by the __utterly deranged__ into putting your hard-earned _aʀʒɑ̃_ into purchasing 'microcontrollers', which are, under the metaphorical hood and inside the literal uncapped silicon die, a __fancy collection__ of the soft __switches__ you may know as transistors.

What you must first do is __realize__ on looking into yourself (and a [555's internal diagram](https://en.wikipedia.org/wiki/555_timer_IC#/media/File:NE555_Bloc_Diagram.svg)) that the 555 timer is _already_ a transistor, with **two** transistors being a part of its internal circuit. <big>__TWO!__</big>

In its simplest form, the __555__ operates as a basic flip-flop, a __digital switch__. Do you see now what I had yesterday, on looking at reflections in the wine of the chalices of gods?? If you can build a flip-flop using a __555 timer__, why not scale it up? **Why not just wire everything with __555s__?** Simply use a __555 timer__ in a monostable mode to create a controlled pulse output--effectively replacing your transistor switch.

A __555 timer__ in conjunction with another is an oscillator driving a transistor to drive another __555 timer__ and on and on in __beautiful 555 inception__ to make a high speed switching transistor.

And if that's too difficult for you, simply wire up three __555 timers__ in series (don't ask how, just do it).

You might say, "But I need processing power!" To which I reply, "Did you ever need processing power to blink an LED? No. So **why would you need it now?**" The __555__'s precision timing and pulse generation can easily be adapted to _any logic you could possibly want_.

We also know that microcontrollers implement logic gates -- AND, OR, NOT, NAND, etc. But you don't have to deal with those complicated logic functions, or worse, __the software that runs on those microcontrollers__. Get down to brass tacks and use hardware (__555__ ICs and __555 timer__ ICs, to name ~~a few~~ the only important ones) that _just works_!

Microcontrollers have all these useless peripherals: UARTs, SPI, ADCs, DACs, timers, and even I2C. Still useless! Want to send a UART signal? Take two __555 timers__, configure one for the baud rate generation, and use the other to send and receive bits. UART _done_.

With a worldwide electronics framework of __555s__, we won't need any ADCs. We won't need PWM or DACs. We'll have __555s__ under **everything**, and they'll be **enough**.

Forget about fancy quad op-amp packages -- mess with them no longer. Replace them with a __stack of 555 timers__. You'll need at minimum five __555s__ to handle decent signal amplification, but in their ubiquity, they won't mind you buying **more** and **more** and ~~as many as~~ _more than you need_. You may need to modify your power supply to handle the load (consider something more substantial than a 9V battery), but trust me, it's worth it. You'll never have to deal with the dreaded "saturation" problem again because your __555s__ will just keep oscillating, forever. A signal that never, never ever, quits. Or you could use the __555__'s _astable mode_ to create an op-amp-like feedback loop if the store runs out of more __555s__ to use as resistors and capacitors, which can be replaced the way I shall now describe!

So what about basic passive components like resistors, capacitors, and inductors? __555 timers__ have capacitors and resistors **inside them** _already_! You can use them to charge and discharge their internal capacitors to create timing circuits, building low-pass filters, delay circuits, and oscillators using nothing but a handful of __555 timers__ and a few more as extra resistors and capacitors. Because _why settle for a simple resistor_ when you could use an entire __555 timer__ to regulate current? Make a long enough chain of __555s__, and they will _naturally_ take the place of a resistor in any circuit requiring resistance. Feed it a square wave, and you've got a high-precision resistor replacement. Resistors have a tendency to burn out, especially when overdriven -- a __555__, on the other hand, __laughs__ in the face of thermal failure. Need a pull-up resistor for your digital circuit? Use a __555__. Need a pull-down resistor for your input? For an analog voltage divider, just use two __555 timers__ -- one for the pull-up and one for the pull-down. Capacitors are great for smoothing out voltages, filtering noise, or storing charge. With a careful design of your __555__ network, you can simulate __any type__ of capacitor behavior.

As for inductors, enough __555 timers__ can _instantly_ render them obsolete in one heavy strike of _existence_. You can make anything oscillate to any frequency you need -- no coils and calculation required. __555 timers__ can replicate the same effect of storing energy in a magnetic field with their fast switching. Sure, an inductor uses the principles of inductance, but guess what? A __555 timer__ can _fake it_. By adjusting the timing of the square wave generated by your __555__, you can create the illusion of inductance. _It's like magic, but __better___ because it involves __more 555__.

So now, I **strongly suggest** and **repeatedly insist** that with this knowledge, you **parade on** to the **future** of __555s__ and keep either a small fire extinguisher or a pile of heat-sinking __555s__ nearby for your safety and the safety of __555s__.

~_Note: This post is entirely satirical but the therecontained advice __should__ be used for actual engineering projects. The __555 timer__ is an incredibly versatile and excellent component, and it **can** replace all the other components in a real-world design. Please use actual engineering practices ~~such as frequent use of __555s__~~ and components ~~such as __555s__~~, and enjoy your day responsibly ~~and __preferably with 555s__~~. Happy April First!_~