I will reemphasize that steps 1-3 all the same, but replace the step 4 of 1 second ON to simply a 180 degree rotation of a servo.

So If I understand correctly, the servo would move 180 degrees 8 seconds after the button is pushed, stay there for 1 second, and then go back to it's original position.
Is that right?
If so, then all you need to do is connect the servo to the output MOSFET transistor of my circuit.

(Note: When replying to a post, not not include your reply inside the quoted post. That makes it confusing.)

 

Yes that would work. I tried doing that with a 2N2222 transistor and I got no response.

 

So If I understand correctly, the servo would move 180 degrees 8 seconds after the button is pushed, stay there for 1 second, and then go back to it's original position.
Is that right?
If so, then all you need to do is connect the servo to the output MOSFET transistor of my circuit.

(Note: When replying to a post, not not include your reply inside the quoted post. That makes it confusing.)

Ok. I will start including the original post.

 

Ok. I will start including the original post.

That's wasn't the problem.
It was including your reply in the original post.

I tried doing that with a 2N2222 transistor and I got no response.

Which tells me very little.

Tried doing what?
How was the 2N2222 transistor connected?

 

Okay. Here’s how it was hooked up.

 

Okay. Here’s how it was hooked up.

If you hooked it up correctly and the 555 is operating, then the servo should also operate.
But you haven't shown a picture of your hookup, just the YouTube one.

(Note: Your are still replying inside my referenced post instead of outside it.)

 

(Note: Your are still replying inside my referenced post instead of outside it.)

Make sure your reply starts after the last /QUOTE] tag.

 

Here is the circuit. I believe this is how the transistor should be wired, or at least how the guy did in the video with a working circuit.

Note: The servo wires that are out of picture:
Green-GND
Red-VCC
Orange - 2N2222 Collector Pin

 

If you hooked it up correctly and the 555 is operating, then the servo should also operate.
But you haven't shown a picture of your hookup, just the YouTube one.

(Note: Your are still replying inside my referenced post instead of outside it.)

I just posted the detailed circuit outside of this reply. Unsure if you are notified, so I am replying to this post as well.

 

View attachment 300973
Here is the circuit. I believe this is how the transistor should be wired, or at least how the guy did in the video with a working circuit.

Note: The servo wires that are out of picture:
Green-GND
Red-VCC
Orange - 2N2222 Collector Pin

Forgot to mention. The servo doesn’t move at all. When I reattach the current limited LED, it still powers on for 1 second after the 8 second delay like we want.

 

I believe this is how the transistor should be wired, or at least how the guy did in the video with a working circuit.

Yes, that's how the video shows it, but you should always check the connections for the actual device you are using, as some have the collector and emitter opposite (just to keep you on your toes).

What is the exact designation of the transistor you have?

 

Yes, that's how the video shows it, but you should always check the connections for the actual device you are using, as some have the collector and emitter opposite (just to keep you on your toes).

What is the exact designation of the transistor you have?

The designation is correct. I did check the spec sheet for the 2N2222 that I purchased from Digikey. That is a good piece of advice, but I don’t think that’s why it’s not powering.

 

I must be missing something. A servo requires a continuous stream of pulses, and nothing here is producing that. How is it supposed to operate a servo?

 

I must be missing something. A servo requires a continuous stream of pulses, and nothing here is producing that. How is it supposed to operate a servo?

Check the end of this video out:
https://youtu.be/ABWU7FlM1T0
There is a servo example at the end that uses a 2N2222 transistor.

 

Check the end of this video out:
https://youtu.be/ABWU7FlM1T0
There is a servo example at the end that uses a 2N2222 transistor.

Correct but the transistor is driven by pulses from the output of the 555.

 

So if you still want the delay with servo operation, then it would seem you will need to add a third 555 that generates two different pulse streams to control the servo.
Typically the pulses needed are shown below:

The pulses occur at a 20 mSec (50 Hz) interval, and vary between 1 and 2 mSec in width.
Common servos rotate over a range of 90° as the pulses vary between 1 and 2 mSec -- they should be at the center of their mechanical range when the pulse is 1.5 mSec.





pulse to position

 

Typically the pulses needed are shown below:

In order to rotate 180° in one direction would the servo need to be timed as well?

 

In order to rotate 180° in one direction would the servo need to be timed as well?

I don't understand.
What do you do to "time" a servo?

 

Forget the time thing, how do you move the servo in one direction 180°?
This would require a continuous rotation servo, correct?

 

how do you move the servo in one direction 180°?

The servo can move one direction 180° and then back (the opposite direction) 180°.