Introduction: Giant 555 Footstool

Picture of Giant 555 Footstool

Since the creation of integrated circuits, there has not been any circuit more useful, more iconic, than the 555 timer created by Hans R. Camenzind. This simple circuit named after it's 3 parallel 5k ohm resistors, has enabled engineers and hobbyist alike to build simple and complex circuits since 1971.

To commemorate 45 years of simplifying circuit design, I wanted to build something that embodied my geeky electronic side while getting me out to the shop to get my hands dirty.

This instructable will show how to laminate 24 sheets of MDF to create a 45:1 scale model 555 footstool.

I built my stool using a layering technique that is demonstrated on this 555 timer stool that was posted several years ago on the Evil Mad Scientist website by Windell Oskay. That is the first ever 555 timer stool I can find online, and rightfully deserves credit for the idea.

Step 1: Design

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This design was made by reverse-engineering a physical 555 timer IC then building it in Soldiworks at the larger size. It was then edited and sliced into 3/4 inch thick slices.

I have included all drawings in downloadable PDF form as well jpeg copies in this and other steps.

The included PDF copy of the stencil is also necessary for the detailed painting of the part number in later steps.

Step 2: Materials Needed

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Materials Needed:

Tools Needed:

Step 3: Cut Body

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Cut 12 copies of the body. I cut the body from blanks that measured 10 1/4 inches x 6 1/2 inches. This will form the middle portions of the IC.

Step 4: Cut Legs #1

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Cut out the four sections of legs that will touch the ground. I cut mine from blanks that measured 16 7/16 inches x 11 1/6 inches Cut the first then use that as a template for the others.

Step 5: Cut Legs #2

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Cut six copies of the half leg portions. These will sit next to the legs that touch the ground to widen the leg. I cut mine from blanks that measure 15 7/16 inches by 7 3/4 inches.

Step 6: Cut and Shape Ends

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Cut two more shapes that match the twelve middle portions. Using a hand plane, shape the ends.

Step 7: Cut Angle on Legs #2

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Clamp sections together and mark where to cut the shorter leg portions.

Step 8: Drill Interior Holes

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I attempted to keep everything lined up as much as possible by taking extra care with creating registration marks across the top and making exact measurements for interior holes and using one middle section as a template for all the others. In the end, it didn't seem to matter as I was still off. Don't sweat this step too much as you will be able to fix all the irregularities later by removing the highs and filling in the lows.

Step 9: Test Fit and Prepare to Glue

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Test it out. Put everything on the threaded rod and make sure that it fits nicely.

Step 10: Glue Main Body

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Cover everything in glue. Learn from my mistake, lay something down so you don't need to clean up large amounts of glue. Clamp everything together. Wait for everything to dry thoroughly.

Step 11: Glue Ends

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Glue the last four portions on the ends.

Step 12: Smooth and Shape

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I ended up buying a belt sander for this project alone. A regular orbital sander will take forever depending on how much material needs to be removed.

Step 13: Glue Ends

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Glue the remaining ends on, and sand everything smooth.

Step 14: Shape Between Legs

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Remove the remaining unwanted material between the legs with a chisel and mallet.

Step 15: Cut Notch

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Mark a semi-circle on one end with a diameter of 2 1/2 inches. Using a router, freehand the notch 1/2 inch deep.

Step 16: Make Room for the Washer

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Use a holesaw, cut out a hole deep enough for the washer and nut. I wrapped the drill bit on the hole saw with painters tape to make it the same size of the hole.

Using a chisel, remove the unwanted material. Cut the threaded rod to length.

Step 17: Apply Bondo

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Using a large paint stir stick as a putty knife, apply the Bondo. I probably applied five or six layers of Bondo sanding between each layer. Any irregularities here will show in the final painted product.

Step 18: Prime and Paint

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I used this shellac primer because it seals up the MDF very nicely. Apply many many coats of primer as anything not covered will allow the black paint to soak into the MDF.

Step 19: Prepare Template

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Print the PDF template on card stock and cut out the letters. Save the inside portions of the 8 and P.

Step 20: Transfer

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Cover the top of the stool with painters tape. Place the stencil on the top of the stool and tape in place. Using a pencil draw the letters onto the painters tape.

Step 21: Cut Painters Tape

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Remove the letters with an craft knife.

Step 22: Paint Label

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Cover the rest of the stool to protect it from paint. Do a first coat of black paint. This will seal the edges of the paint. And if anything was going to seep under the paint, it will be the black paint that will seep. Wait till the first coat is dry, then paint a light coat of grey primer. I didn't want a heavy sold coat as most ICs I've see have more of a speckled print of the letters than solidly printed. Remove tape.

Step 23: Paint Legs

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Using the same techniques as the previous step, tape the legs and paint.

Step 24: Touch-up

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Do any touch up needed. I used a toothpick to fill in any irregularities in painting.

Step 25: Protect

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Cover with clear coat to protect your new stool.

Step 26: What Else Can Be Made?

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There are so many different directions that this can be taken in! There have been many great projects in the past that have been inspired by the 555 timer. Some can be found here on instructables, and othersaround the internet.

What furniture can you make inspired by this or other components?


RonB2 (author)2016-04-26

Wow, lot of work involved but for an AMAZING result. That is so cool. Beautiful job.

Now you need to make a Z80 or 6502 chair to go with it.

MikB (author)RonB22016-04-30

I think you mean a 6502 3-seater sofa, given the aspect ratio of the chip! :)

PeterTheUnGreat (author)2016-04-26

Absolute genius! Geek pride rules

ImagineCircuits (author)2016-04-26

haha very geeky nice job

frarugi87 (author)2016-04-26

Sorry, but the main idea behind the 555 was to reduce the size of circuits by putting lots of components into an IC. If yours was used, well, there wouldn't have been lots of circuits using it :D excellent work!

jacksdad3 (author)2016-04-26

I was just telling my wife aboout how the Triple 5 allowed me to build a rock-solid cycral controlled cloack, back in the early 70s when I was a new engineer, doing digital design work!

Oh! Those were the days! I gotta build this!

BeachsideHank (author)2016-04-25

Major geek, I love it!

ZombieWorkshop (author)2016-04-25

You make smile this electronic engineer, great work

Luke Wilson (author)2017-06-29

That is one of the COOLEST THINGS I have EVER SEEN!!!

canklot (author)2016-10-20

Very good man :D

reydepicas (author)2016-09-09

Very very original. I really like it!!!

KISELIN (author)2016-08-06

Would you bileve me if I told Ya: I learned about the 555 sometimes around them beg. of 80's? (1980's) :) AND THIS YOU wan't bilieve me telling you: Just about a year ago i "REALLY" learned the function of "discharge" on pin 7 ? DAMN.. DAMN... me. You can actually use it as a "output", charge ~100mA, and still NOT involving the discharge procedure.... gee it's an open source output. Took me 20years to learn that..... LOOOOVE the 555 made <........this many creations with it.......<

luisfpl (author)2016-06-21

Really nice project, congratulations.

Akin Yildiz made it! (author)2016-06-20

finally made my own version, thanks for the inspiration.!!!

001DeLeon (author)2016-05-17

Thank's Troy! cool, but I don't have the materials... Looks like a Hex bug

gm280 (author)2016-05-03

I like it a lot. I have an idea how you could maybe make the effort a little less work. You could try using polyester resins and fiberglass matt over foam core. Just a suggestion. But great project either way.

tomatoskins (author)gm2802016-05-04

That's a great idea! And it would probably be much lighter as well!

Jonathanrjpereira (author)2016-05-02

So cool MAke an entrie living room with Electronic component furniture

Yonatan24 (author)2016-04-26

This is so awesome!!! I'd love to make one of those so much!

Perhaps the next one would be the LM7805 table or chair? ;)

t800 (author)Yonatan242016-04-26

Brilliant! ....yes and a 2N3055 bar stool, BC109 cookie jar, TDA2050 bench .... :-)

Yonatan24 (author)t8002016-04-29

Yup! I think the 2N3055 bar stool would be pretty cool!

haycurt (author)Yonatan242016-04-30

It would even have a built in cup holder

darrenah (author)t8002016-04-27

Any common transistor might make a good 3 legged bar stool. :-)

Image result for transistoror

Image result for transistor

Hatredman (author)t8002016-04-26

I think the BC109s are better for the bar stool :)

But the 2n3055 makes for an excellent Cofee Table.

laith mohamed (author)2016-04-29

Cool ... very cool 555

rotormind (author)2016-04-28

Blatant ripoff with no credit to Evil Mad Scientist who did this first.You should be ashamed.

seamster (author)rotormind2016-04-29

He had a link to the EMS stool in the last step, and has moved it to the intro to be more visible.

pachytrance (author)2016-04-28

amazing!!! thanks for sharing

ThomasVDD (author)2016-04-28

This is great! The perfect furniture for an electronics geek :D

Technovation (author)2016-04-28

that's so cool!!!

Dui ni shuo de dui (author)2016-04-28

You should make a carpet with a PCB design on it, plus a few other "component like" furnitures (condenser stools, surface mount resistor cushions, inductive transformer table or whatever)!

Nice instructable and pretty neat construction.

MBM_INPCT (author)2016-04-27

Where are you lovely people selling this 'Chip-rests'? This one is the perfect size for both a foot rest and a side table for when I am programming Arduinos; it, or a pair of these, will definitely help reduce the clutter on the coffee table.

micksmom2 (author)2016-04-27

cool! I would love to have this! I'll have to put this on my list of things to make.

DanielT60 (author)2016-04-26

Take my money!

studleylee (author)2016-04-26

This is so cool !!

thedessonater (author)2016-04-26

I should make one of these with a hollow centre and then put a 555 transistor circuit in there instead of a silicon die. Then connect all of the legs to it.

mtairymd (author)2016-04-26

I like it - great iconic piece. TO-18 bar stool next?

kart15 (author)2016-04-26

new idea ha

mitra2640 (author)2016-04-26

This is amazing. I love it.

dave.vaness.79 (author)2016-04-25

Some silver rub n buff of the pins and it would be perfect! Great job!!!

That's an excellent idea! I've never heard of the stuff! I'll need to order some and see how it looks. I'll post pictures if I make an update!

You cab get the stuff at most any craft store. About $5 a tube

Pricklysauce (author)2016-04-25

Hey I like it a lot. makes me laugh. Could also easily be made as a MDF box with the legs so storage inside. How about some electronics in it maybe a 555 to switch LEDs on and off shinning through the lettering! or the top flips up and a games console inside. This project definitely inspires some ideas.

tomatoskins (author)Pricklysauce2016-04-25

I agree! There are so many different ways to make this! I hope it inspires you to do something similar. If it does, be sure to share some pictures here!

neetz (author)2016-04-25

Love it!!

kylegilbert (author)2016-04-25

Very cool. Nice job!

audreyobscura (author)2016-04-25

This is pretty great. I looked it up immediately after you mentioned it at Show & Tell :P

Greywolfg (author)2016-04-25


leomiranda (author)2016-04-25

Hahahahaha..... amazing! Love it!!!

That Redhead (author)2016-04-25

This is so cool!

About This Instructable




Bio: My name is Troy. I'm a Mechatronics graduate studying Mechanical Engineering. I love making things and doing anything outdoors (especially SCUBA diving). I am ... More »
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