Can someone here make and post me a 555 timer circuit diagram

>>998845
> t seconds

Meant 5 sorry

>>998845
>then polarities switched
So you need the output switching between +10v and -2v? 555 pin 3 just switches back and forth from GND and VCC; it has no way to reverse voltage. You could do that by connecting it to an H-bridge, but making a virtual ground would be easier:

You will need a 12v power supply and a 2v power supply. 2V can be made from the 12v using a regulator or divider. Power your 555 with 12v and GND. For the thing you're controlling use 2V as the ground and 12v for VCC. From that thing's perspective the 555's output will be switching between -2v and +10v.

Build a standard astable 555 circuit to get the timing you want.

>>998845
>Can't disclose that part.

Years ago, I had a billion dollar idea that needed a 555 timer but also was too stupid to figure out how to use one. I asked for help and lost everything. Now Facebook is a huge company and I'm still mopping the floor of my local ham radio club. Good on you for being careful.

I was going to call it FacePlace. Bastards.

>>998845
you can't read a goddamn ti/natsemi datasheet? or appnote?

OP is obviously making some sort of sex machine weapon. The 2 volts is the dead giveaway...

File: cantdiscloseit.png (37KB, 1600x1200px) Image search: [Google]

37KB, 1600x1200px

>>998845

>>998938
>Flip flop
Kinda overkill don't you think? For something that can be done with a not gate

Smart thinking with the h-bridge thing, my first thought would have been a virtual ground but this is more idiot proof.

>>998953
yeah maybe he should replace the jk flip flop with an arduino for more power

nah i think an fpga will be required

in all seriousness though i didn't read what op asked for and thought he wanted a full cycle of 10v 0v 2v 0. i tend to have more 7400x jk flip flops around because of their shear versatility, and they make perfectly good toggle gates

op asked a retarded question so i did my best to give him a retarded answer

File: 1422876448967.jpg (163KB, 800x800px) Image search: [Google]

163KB, 800x800px

>>998938

>>998938
Epic

File: 1422607996222.jpg (33KB, 400x400px) Image search: [Google]

33KB, 400x400px

>>998938

I've had issues where the 555 wouldn't output VCC at 5V, but closed to 3.4V.

If you are not going to tell us what it's for then we are gonna assume you are doing this for profit, in which case I am willing to charge my standard consulting fee.

/diy/ is not your free engineering firm. In exchange for helping people with their projects we get ideas ourselves so we can spawn our own.

File: unspecified.jpg (117KB, 1280x720px) Image search: [Google]

117KB, 1280x720px

>>998938
made my day dude

here you go OP

>>999236
OP here
Why are the resistors blue?

>>999419
They're sad because you don't trust them enough to say what you're doing.

>>998845
It's possible to do. you need an op-amp and a + and - 12V supply.

power the 555 between +12V and GND

power the opamp between +12V and -12V

Use this calculator i made to help you configure the differential opamp circuit
https://www.desmos.com/calculator/0zbkelgjta
make is so that a sweep from 0->12V (x-axis) from the 555 is converted to -2V->10V (y-axis)

be aware that the opamp can only probably output a small amount of current, 20ma? I usually use a TL074 opamp

>>999419
Because you touch tourself at night.

>>999236
DONT DO THIS IT MAKES MJUSTARD GAS

File: 1448554869633.jpg (81KB, 444x322px) Image search: [Google]

81KB, 444x322px

>>999433
>opamp for outputting two discrete voltage levels
>using web based "calculators" for designing a circuit
consider an heroing

>Can't disclose that part.
Homework, huh.

>>>/wsg/1043910

>>999419
because they are having christmas without you.

File: 1442014998824.png (112KB, 297x282px) Image search: [Google]

112KB, 297x282px

>>998845
>>998938
using a pair of switches would be easier.
>>999419
>Why are the resistors blue?

>>999419
They are metal film resistors. That's why they're blue.