Welcome to fireflyprops.net. Click here to register

The Lassetter

Episode 11 - Trash

Re: The Lassetter

Postby Kurtyboy » Sat Jan 07, 2017 11:05 pm

After all that, it made no discernible difference. Circuit still works but still no fade.

It's all a bit messy so I doubt posting pictures of it would help lol!
User avatar
Kurtyboy
Independent Soldier
 
Posts: 199
Joined: Fri May 22, 2009 7:34 pm

Re: The Lassetter

Postby propmaster2000 » Sat Jan 07, 2017 11:58 pm

Kurtyboy wrote:After all that, it made no discernible difference. Circuit still works but still no fade.

It's all a bit messy so I doubt posting pictures of it would help lol!


Kurtyboy,

Did you build your circuit like the video showed?
As long as the NPN transistor starts to conduct (turns on) from a signal from
your 555, we can get this to work.

Please take a picture of your circuit as close and clear as you can and post it.
Maybe I can see what needs to be done.
If you have the resistor, then the diode and another resistor in series, connected to
the BASE (middle leg) of the transistor, adding a capacitor should make a difference.
What value cap. are you using?

Image

https://www.youtube.com/watch?v=JaC8pQNpCf0

Thanks
Last edited by propmaster2000 on Sun Jan 08, 2017 12:02 am, edited 1 time in total.
propmaster2000
Blue Hand guy
 
Posts: 78
Joined: Sat May 23, 2009 12:02 am
Location: So.Cal.

Re: The Lassetter

Postby Kurtyboy » Sun Jan 08, 2017 12:01 am

22uf capacitor. The only difference is 330ohm resistors instead of 470ohm.

Honestly, a photo of the circuit will not even be understandable. I've never built one before so I just made up the method as I went along! Some is on one side of the board, some is on the other, wires go all over the place lol!
User avatar
Kurtyboy
Independent Soldier
 
Posts: 199
Joined: Fri May 22, 2009 7:34 pm

Re: The Lassetter

Postby propmaster2000 » Sun Jan 08, 2017 12:07 am

Kurtyboy wrote:22uf capacitor. The only difference is 330ohm resistors instead of 470ohm.

Honestly, a photo of the circuit will not even be understandable. I've never built one before so I just made up the method as I went along! Some is on one side of the board, some is on the other, wires go all over the place lol!


If you have the diode this will keep the capacitor from discharging through the wrong side of
the circuit. It will block current flow in reverse. Also, putting a resistor of between 1k and 10k
will help to ''slow the discharge'' to the BASE.
If the 1k to 10k resistor is not there, the capacitor will discharge quickly and you won't see the fade effect....
Honestly, I am not concerned by the quality of the work, only the layout.
I know you are new to this.
Post the pic and I will copy it, then you can delete it........
propmaster2000
Blue Hand guy
 
Posts: 78
Joined: Sat May 23, 2009 12:02 am
Location: So.Cal.

Re: The Lassetter

Postby Kurtyboy » Sun Jan 08, 2017 12:23 am

No, I don't have a breadboard, my circuit is this one Image

Checked, double and triple checked.

I modified my old circuit to add in the new components exactly as pictured. Still works but no fade.
User avatar
Kurtyboy
Independent Soldier
 
Posts: 199
Joined: Fri May 22, 2009 7:34 pm

Re: The Lassetter

Postby Kurtyboy » Sun Jan 08, 2017 12:28 am

There's no 1k in my circuit before the NPN. You didn't draw one in.

I just copied the diagram to the letter as that's all I'm capable of ;)
User avatar
Kurtyboy
Independent Soldier
 
Posts: 199
Joined: Fri May 22, 2009 7:34 pm

Re: The Lassetter

Postby Kurtyboy » Sun Jan 08, 2017 12:33 am

The transistor is the wrong way round it seems. Why do they make it with two different pin configurations???? AAAAAHHHHH!!!!!!
User avatar
Kurtyboy
Independent Soldier
 
Posts: 199
Joined: Fri May 22, 2009 7:34 pm

Re: The Lassetter

Postby propmaster2000 » Sun Jan 08, 2017 12:37 am

Kurtyboy wrote:The transistor is the wrong way round it seems. Why do they make it with two different pin configurations???? AAAAAHHHHH!!!!!!


Looking at the transistor flat side toward you,
Emitter - Base - Collector

Put a 1k to 10k resistor (what ever you have) just before the NPN base.
Connect the capacitor + side, between the diode and resistor connection.

The capacitor should be electrolytic. It goes one way.
propmaster2000
Blue Hand guy
 
Posts: 78
Joined: Sat May 23, 2009 12:02 am
Location: So.Cal.

Re: The Lassetter

Postby Kurtyboy » Sun Jan 08, 2017 12:45 am

Doesn't work at all "the correct way round" lol!

I'm turning it back round the wrong way now.
User avatar
Kurtyboy
Independent Soldier
 
Posts: 199
Joined: Fri May 22, 2009 7:34 pm

Re: The Lassetter

Postby propmaster2000 » Sun Jan 08, 2017 12:57 am

Kurtyboy wrote:Doesn't work at all "the correct way round" lol!

I'm turning it back round the wrong way now.


What transistor do you have. What is the number?

Emitter to ground (negative of battery).
Base to your clock circuit (middle leg of NPN).
Collector to the three LED circuit (cathode side of all LEDs).
propmaster2000
Blue Hand guy
 
Posts: 78
Joined: Sat May 23, 2009 12:02 am
Location: So.Cal.

PreviousNext

Return to Trash

Who is online

Users browsing this forum: No registered users and 1 guest