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Multi Coloured LED 120v help
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Lord Garth
electronics forum Guru


Joined: 24 Mar 2005
Posts: 363

PostPosted: Wed Jul 19, 2006 2:36 am    Post subject: Re: Multi Coloured LED 120v help Reply with quote

"steve" <stevesemple@lycos.com> wrote in message
news:1153275902.773530.46460@h48g2000cwc.googlegroups.com...
Quote:
Jason,

I am going to try your ciruit to see what it does to this led. However
I discovered I dont have any 10uf Capacitors so I have to go to the
store. By the way Im guessing that I would use a capacitor that is NOT
polerized. Am I right ??

Regards


You should use an X2 rated capacitor. These are in most switching power
supplies and in folded fluorescent bulbs. Look for the X2 on the label.
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jasen
electronics forum Guru Wannabe


Joined: 18 Jun 2006
Posts: 204

PostPosted: Wed Jul 19, 2006 8:21 am    Post subject: Re: Multi Coloured LED 120v help Reply with quote

On 2006-07-18, steve <stevesemple@lycos.com> wrote:

Quote:
Unfortunately the store I bought the part at was one of those re
package stores, eg it came in a plain little plastic bag. The store guy
said that it was 3 volts, unfortunetely I dont know how many ma.

You've got a multimeter, you can measure it.

"LED"
.----->|-----.
| \\ |+
| (mA) Multimeter on 200mA (or similar) range
| |-
| +| | |
`---||--||---'
| |

3V supply (eg: 2xAA cells)

Be careful not to let the LED legs touch each other after this is set
up, that could damage your multimeter (most likely just pop its fuse)

Bye.
Jasen
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jasen
electronics forum Guru Wannabe


Joined: 18 Jun 2006
Posts: 204

PostPosted: Wed Jul 19, 2006 8:30 am    Post subject: Re: Multi Coloured LED 120v help Reply with quote

On 2006-07-19, steve <stevesemple@lycos.com> wrote:
Quote:
Jason,

I am going to try your ciruit to see what it does to this led. However
I discovered I dont have any 10uf Capacitors so I have to go to the
store. By the way Im guessing that I would use a capacitor that is NOT
polerized. Am I right ??

Regards

Try the 100uF capacitor you used with the other circuit.

The capacitor will be only seeing a few volts of DC (the extra diode makes
sure it's DC) so a polarised capacitor will be fine.

Bye.
Jasen
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jasen
electronics forum Guru Wannabe


Joined: 18 Jun 2006
Posts: 204

PostPosted: Wed Jul 19, 2006 8:31 am    Post subject: Re: Multi Coloured LED 120v help Reply with quote

On 2006-07-19, Lord Garth <LGarth@Tantalus.net> wrote:
Quote:

"steve" <stevesemple@lycos.com> wrote in message
news:1153275902.773530.46460@h48g2000cwc.googlegroups.com...
Jason,

I am going to try your ciruit to see what it does to this led. However
I discovered I dont have any 10uf Capacitors so I have to go to the
store. By the way Im guessing that I would use a capacitor that is NOT
polerized. Am I right ??

Regards

You should use an X2 rated capacitor.

for 3 to 5 volts ?

Bye.
Jasen
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steve
electronics forum beginner


Joined: 20 Dec 2005
Posts: 36

PostPosted: Fri Jul 21, 2006 9:24 am    Post subject: Re: Multi Coloured LED 120v help Reply with quote

Your schematic works too.
The sequence is a little different however. When using the bridge
rectifyer the lights seem a little slower. With your way of doing it
the lights blink quicker with more of a burst and less of a pause. Im
not sure why this is, whether the voltage is less or more with yours. I
will have to experiment and with the variables and see what differences
it makes.

Thank you for your help.

regards
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Google

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