Useless^2 (The more pocket sized way.)

I'm sure most people have heard of the most useless machine. When it is useless x useless he calls it useless squared. I built a simpler useless squared that does't use a DPDT switch nor does it use two motors. The video will explain.

Step 1: Get the Parts

You will need:
2 555 timers (You only need one but get two just in case you break one.)
Jumper Wires/ Component Leads
Breadboard/Protoboard
1x:
1Kohm resistor
4.7Kohm resistor
10Kohm resistor
33Kohm resistor
68Kohm resistor
0.01uF capacitor
0.1uF capacitor
General Purpose NPN transistor (don't use a power transistor...it requires more power to operate.) (2N3904,BC547, etc.)
Servo Motor (DON' T use a micro servo...no torque...) (Use a continuous rotation servo if not...mod a regular servo.)
Batteries and accompanying holders
SPDT Slide Switch (don't use rocker or toggle)

Comments

[blinkyblinky]

This project reminds me of politicians.

It also reminds me when there is work to be done...

[deathsmileyinc]

let me get this straight, the servo tester is just an H-bridge right?
i want to make this using a flipflop, can i use the one you showed in your other instructable about the 555 timer or a 556 dual timer?

[blinkyblinky]

Ahhh...I said H-bridge in the video...

The servo has a board inside of it that reads pulses It is basically an H-bridge INSIDE the servo.

[blinkyblinky]

No...the 555 sends a pulse to the servo. This is probably the best tester if you don't want to take apart your servo. You don't have to mount the switch on the side. I'll research the idea, however.

[deathsmileyinc]

oh, i get it now, i didnt knew the difference between a regular motor and a servo but i read a little bit of theory on it, i would like a little bit more information on the 555 timer flipflops tough

[blinkyblinky]

Bistable is a flip-flop. Basically, it will remain in one position until it is reset.

Trigger from pin 2 will cause it to set high. Pin 4 will reset the flip-flop when it is pressed.

Any questions?

Class dismissed.

[techhobbit]

Very good! I like it!
Did you try a single servo horn? ...that would give a full 360 rotation, and a little slower action.

This could be used to power "window" wipers on a pair of steampunk goggles, or drive an antenna sticking out the top of a hat! ...still very useless, of course, but with a slight oscillation of whimsy!

Hope you win the robot contest!

[blinkyblinky]

Good idea. I will try to use the single horn. Technically, it is not 360

[blinkyblinky]

This line says that it is a very clever idea. By the way ,I have no idea why it got cut off.

Thanks for the encouragement.

[Robot Lover]

I can think of a way to do this without the chip. Modify the servo like in this ible', then substitute it for the motor in the below instructable.

http://www.instructables.com/id/How-to-make-an-H-bridge/

OR, an easier way would be this: Modify the servo like the above instructable, then build this circuit:

[blinkyblinky]

I know what you mean. I had thought of this but I didn't want to mod the servo. It was not cheap. I could have bought another servo but I didn't have enough time for the robot challenge.

[TheAwesomestDude]

this is.................. well....................useless lol 5*s

[blinkyblinky]

Of course...its called the useless machine...

[TheAwesomestDude]

i know that i was congragulating you on making something useless but .........well.............useless machine

[blinkyblinky]

You like ellipses...so do I.

By the way...I know...

[TheAwesomestDude]

what aare elipses?

[blinkyblinky]

............these...............

[TheAwesomestDude]

ohhhhh.............................these............................

[blinkyblinky]

Yes...these...

[TheAwesomestDude]

okkk..............................................................i get it.................................................

[blinkyblinky]

You're welcome...

[TheAwesomestDude]

ikr..............................................................................................................................

[blinkyblinky]

What's ikr?

[TheAwesomestDude]

i.......................................................know...........................................................right..........................................

[blinkyblinky]

It doesn't make sense...

[TheAwesomestDude]

yes ..............................................it...............................................does

[blinkyblinky]

I guess...

Not really.

[TheAwesomestDude]

yeah.........................................................................................................................
it does

[blinkyblinky]

I don't know...

Not really.

[batonas]

this is so fun :D

[blinkyblinky]

Thank you.