beam : Message: Re: [beam] Slow pulsar

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Message #36734 of 59779 |

Re: [beam] Slow pulsar

That was easy!

Although not tested and some values will need tweaking, here is a PWM
version of the Quad LED Fader. (QLF2)

wilf

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Fri May 23, 2003 6:44 am

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"Wilf Rigter" <wrigter@...>

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Message #36734 of 59779 |

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Here's one alternative: Quad LED Fader 1 (QLF1) Requires just 2 ICs (LM324), 4 transistors,16 resistors, 5 caps, 1 pot and 40 LEDs. That's 28 parts plus the 40...	Wilf Rigter wilf_nv	May 23, 2003 4:16 am
That was easy! Although not tested and some values will need tweaking, here is a PWM version of the Quad LED Fader. (QLF2) wilf ... Outgoing mail is certified...	Wilf Rigter wilf_nv	May 23, 2003 6:44 am
Hmm, I couldn't get the PWM QLF to work. The LED's just flash on momentarily when you apply power. I don't have any LM324's at the moment so I'll have to play...	Bill Bigge billbigge	May 23, 2003 11:42 am
Hmm, neither can I. The QLF2 circuit can be made to sort of work with several additional components. Attached is an all opamp PWM circuit and a hybrid PWM...	Wilf Rigter wilf_nv	May 23, 2003 6:50 pm
I have tested the QLF4 (PWM Quad LED Fader) circuit, and I can report that it works very well. Let me explain how the circuit works since the basic PWM...	Wilf Rigter wilf_nv	May 23, 2003 9:44 pm
Thanks Wilf, I'll play around with it next week. Bill ... Bill Bigge Autonomous Systems Lab Room 5A23 Cognitive and Computing Sciences Pevensey-II Sussex...	Bill Bigge billbigge	May 24, 2003 1:29 pm
I have one question. What does the term p/p mean in the following sentence? ... Thanks, J Wolfgang Goerlich...	J Wolfgang Goerlich jwgoerlich_us	May 25, 2003 11:50 am
Peak to Peak maybe? ... From: J Wolfgang Goerlich To: beam@yahoogroups.com Sent: Sunday, May 25, 2003 6:50 AM Subject: [beam] Re: Slow pulsar I have one...	Wayne McKnight haroldwmcknight	May 25, 2003 1:56 pm
Yes, "between 1V and 2V p/p" is questionable shorthand for a triangular waveform with lower and upper peaks of 1V and 2V. Another way to describe it as a...	Wilf Rigter wilf_nv	May 25, 2003 2:05 pm
Here is the polished up tested design, Quad LED Fader 5, which works on the same principle as QLF4 but uses a LM339 quad comparator instead of the LM324 quad...	Wilf Rigter wilf_nv	May 26, 2003 6:23 am
Here's that same schematic, but with a black foreground (it will probably be easier to see than the transparent one :) Ori...	Ori ori_barbut	May 26, 2003 8:58 pm
Always aiming for the pure minimalist design, here is QLF6, an amazingly simple but effective 4 channel LED controller which requires just 14 parts plus LEDs. ...	Wilf Rigter wilf_nv	May 28, 2003 8:11 am
Wilf Since it has four channels it should would work well with those kingbright rgb leds with the two blue elements... ...	Neil psyclesam	May 30, 2003 1:15 pm
Thanks to all for the Op-Amp info - plenty to digest. With a basic understanding I still can't see an easy way of using Wilf's QLF6.gif... ...	Neil psyclesam	Jul 22, 2003 9:08 pm
Belt and suspenders: 1) adapt QLF for your common cathode requirements 2) it's in the mail wilf ... From: "Neil" <psyclesam@...> To:...	Wilf Rigter wilf_nv	Jul 22, 2003 10:23 pm
Can I use 1uF monolithic caps for the new QLF7 (Quad Led Fader - Common Cathode Version)? neil wilf's QLF7 post... ...	Neil psyclesam	Jul 23, 2003 6:58 pm
I used tantalums but monolithic caps are even better as they have lower leakage currents. ... From: "Neil" <psyclesam@...> To:...	Wilf Rigter wilf_nv	Jul 23, 2003 9:46 pm
Yippeee!! I have finished breadboarding QLF7. Here is a video of it in action... http://www.sandstrom.demon.co.uk/Vids/qlf.avi Microsoft Video Version 1 codec...	Neil psyclesam	Jul 24, 2003 12:04 am
Great stuff Neil! Your efforts makes it all worthwhile to develop these ideas into real circuits. Sure would like some feedback. I noticed that some rainbow...	Wilf Rigter wilf_nv	Jul 25, 2003 2:21 am
~>Sure would like some feedback. I ~>noticed that ~>some rainbow circuits purposely suppress "white" combinations ~>to increase ~>the apparent colour...	Neil psyclesam	Jul 25, 2003 8:41 pm
Here is another avi. Play length 35 seconds, 160 x120 1.32 MB (1,384,888 bytes) www.sandstrom.demon.co.uk/Vids/qlf2.avi I have tried to manually adjust my...	Neil psyclesam	Jul 25, 2003 11:44 pm
Hi Neil, ... Thanks for reporting the results. With all those new circuits popping up, I don't have time to build and test them all. Those are very similar to...	Wilf Rigter wilf_nv	Jul 25, 2003 11:55 pm
OK... I know this response is a little on the late side... But that is so cool! It's EXACTLY what I've been looking for. I have not had a lot of time lately,...	Richard Piotter richfiles	Sep 6, 2003 2:21 am
i think i found surfacemount rgb leds from fairchild semicondoctor -jonathan...	Jonathan Challinger Jonathan@...	Sep 6, 2003 3:20 am
Wilf Would you be good enough to send me the cct diagram please. email is david@... Thanks a lot. Dave ... amazingly ... 14 parts ... changes in ...	davidnewtondines davidnewtond...	Sep 20, 2003 8:22 pm
Hi i was reading the message bellow and was wondeirng if i could get the schematic or plans for this QLF6 circuit Please let me knwo thanks Oliver ... ...	enoc2222	Sep 21, 2003 2:28 am
Here you go... Martin Jay McKee...	Martin Jay McKee martinjaymckee	Sep 21, 2003 6:15 am

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