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 Begineer needs help--Electronic Kit?		  New Topic  Reply to Topic
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minchella91
New Member

2 Posts
Posted - Oct 07 2009 :  2:16:35 PM  Show Profile  Reply with Quote
Need to know if there is an electronics kit available to do the following: LED Lights will be connected in a series spelling out Happy Holidays.

1. Light up Line 1 (words) "BLBLBLBL"
2. Then Light up Line 2 (words) "BLBLBLBLBL"
3. Then keep both line 1 & 2 on for 30 seconds
4. Then start over again with Line 1 & 2.

Schematic is below.



Download Attachment: Holiday Sign Schematic Picture.JPG
30.94 KB
Edited by - minchella91 on Oct 07 2009 2:26:32 PM

Aaron Cake
Administrator

Canada
6718 Posts
Posted - Oct 12 2009 :  10:28:43 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
What does "BLBL" mean?

The schematic you posted is a very simple oscillator. You can adjust the timing by changing the 330uF capacitor.

Instead of using a relay, which will click constantly, a transistor should be used.
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minchella91
New Member

2 Posts
Posted - Nov 02 2009 :  1:46:49 PM  Show Profile  Reply with Quote
Thanks. Can you tell me exactly what type of relay or transistor I need to purchase? And "BLBL" means "Happy" "Holidays".
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audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - Nov 02 2009 :  2:18:29 PM  Show Profile  Reply with Quote
The transistors are not connected as an oscillator. One transistor is by itself.
Look in Google for transistor multivibrator.

The ratings of the transistor LED drivers depend on the amount of voltage and current they must pass to the LEDs.
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Aaron Cake
Administrator

Canada
6718 Posts
Posted - Nov 03 2009 :  09:41:34 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
Sorry, multivibrator.
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pebe
Nobel Prize Winner

United Kingdom
1078 Posts
Posted - Nov 03 2009 :  10:01:41 AM  Show Profile  Reply with Quote
Can someone explain to me what this wiring diagram does and how it is supposed to work?

All I see are two discrete transistors, with no mutual coupling and each with capacitive feedback from C to B.
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