Most novel LED flasher ?

Andre · Jul 25, 2003

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

Wouter van Ooijen (www.vo · Jul 25, 2003

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

I would cheat: take an 8-pin PIC and remove the 5 unneeded pins (after
programming, because that requires 5 pins).

Wouter van Ooijen

-- ------------------------------------
http://www.voti.nl
PICmicro chips, programmers, consulting

Vladimir Vassilevsky · Jul 25, 2003

Logic NOT gate in SOT-23-4 package + resistor + capacitor = 3 parts.
Two transistors + resistor + capacitor = 4 parts.

Self flashing LED = no parts

Vladimir Vassilevsky, Ph.D.

DSP and Mixed Signal Design Consultant

http://www.abvolt.com

Andre wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

John Larkin · Jul 25, 2003

On 25 Jul 2003 12:09:11 -0700, testing_h@yahoo.com (Andre) wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

1 mosfet
1 resistor

(Guess how?)

John

A E · Jul 25, 2003

Andre wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

Is a battery included in the 'parts'? And how many times does it need to flash?
Whatever happened to UJTs? sigh....

Ken Smith · Jul 25, 2003

In article <2c2cf14c.0307251109.c958ad0@posting.google.com>,
Andre <testing_h@yahoo.com> wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

1 resistor
1 Thermostat taped to resisitor
-----
2 Parts

--
--
kensmith@rahul.net forging knowledge

Boris Mohar · Jul 26, 2003

On Fri, 25 Jul 2003 14:51:47 -0700, Jim Thompson
<Jim-T@analog_innovations.com> wrote:

On Fri, 25 Jul 2003 20:58:53 +0000 (UTC), kensmith@violet.rahul.net
(Ken Smith) wrote:

In article <2c2cf14c.0307251109.c958ad0@posting.google.com>,
Andre <testing_h@yahoo.com> wrote:
Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

1 resistor
1 Thermostat taped to resisitor
-----
2 Parts

--

1 Part: Turn signal flasher ?

...Jim Thompson

0 parts: Flashing LED

http://ca.digikey.com/scripts/ca/dksus.dll?Criteria?Ref=7498&Cat=31785799

--

Regards,

Boris Mohar
Viatrack Printed Circuit Designs http://www3.sympatico.ca/borism/
Aurora, Ontario

N. Thornton · Jul 26, 2003

testing_h@yahoo.com (Andre) wrote in message news:<2c2cf14c.0307251109.c958ad0@posting.google.com>...

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

Hi

If we could use hand pickled parts, just what would we do with them?
Think... light emiting diode... will a pickle behave as a diode? if
so, the hand pickled onion can be our light emitting diode, with the
help of about 240v. Aha, as it burns up it may well flicker and flash
to some extent too.

I like the idea of cutting some pins off that 8 pin IC better - bit
more practical

BTW would the fork prongs be classed as pins? Mind you, if its not a
chip, it could have as many pins as you like according to your above
spec. So you cant eat the pickle with chips.

Regards, NT

R. Steve Walz · Jul 26, 2003

John Larkin wrote:

On 25 Jul 2003 12:09:11 -0700, testing_h@yahoo.com (Andre) wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

1 mosfet
1 resistor

(Guess how?)

John
----------------------

Gate capacitance?: High-valued resistor from Vdd to Gate, connect Gate
to Drain, LED from Vdd to Drain, Source to Ground.
-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public

CWatters · Jul 26, 2003

Someone wrote..

So far I have got down to 6 parts + LED, using a regulator IC .

Use a LDO regulator with the wrong output capacitors to make it unstable -
can't be sure it will oscilate at the right freq though.

Rob Judd · Jul 26, 2003

Vladimir Vassilevsky wrote:

Logic NOT gate in SOT-23-4 package + resistor + capacitor = 3 parts.
Two transistors + resistor + capacitor = 4 parts.

Self flashing LED = no parts

You win! You win!

Rob

Fred Bartoli · Jul 26, 2003

"Andre" <testing_h@yahoo.com> a écrit dans le message news:
2c2cf14c.0307251109.c958ad0@posting.google.com...

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

What about a fluorescent lamp starter (and maybe a shunt R)?

Fred.

John Larkin · Jul 26, 2003

On 25 Jul 2003 12:09:11 -0700, testing_h@yahoo.com (Andre) wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

OK, here's an easy one:

1 SOT-23 TinyLogic gate

1 resistor

1 capacitor

John

Watson A.Name - 'Watt Sun · Jul 27, 2003

In article <1283iv0cv6sjljmicn816hvk4m09muo5d1@4ax.com>,
speff@interlog.com mentioned...

On Fri, 25 Jul 2003 17:19:03 -0400, the renowned A E
aeisenhut@videotron.ca> wrote:

Andre wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

Is a battery included in the 'parts'? And how many times does it need to flash?
Whatever happened to UJTs? sigh....

PUTs are still around.

The simplest is to use 3 pin flasher chip (mostly sold in 4-bonding
pad die form for inclusion in LEDs, but TO-92 package is available).

Best regards,
Spehro Pefhany

Just 1 part, a buzzer or relay connected as a buzzer. Maybe a current
limiting resistor. Nothing was said about flash rate. If that is too
fast, add weight to the armature to slow down the flash rate.

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
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Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
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@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

Kevin McMurtrie · Jul 27, 2003

In article <2c2cf14c.0307251109.c958ad0@posting.google.com>,
testing_h@yahoo.com (Andre) wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

Apply tiny current through a blue LED backwards. Now run it under
normal conditions. It will flicker and flash as its damaged crystal
burns away.

Watson A.Name - 'Watt Sun · Jul 27, 2003

In article <r316ivkv7s2jvqvt8t8rpj1bt0h81og2kr@4ax.com>,
jjlarkin@highlandSNIPtechTHISnologyPLEASE.com mentioned...

On 25 Jul 2003 12:09:11 -0700, testing_h@yahoo.com (Andre) wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

OK, here's an easy one:

1 SOT-23 TinyLogic gate

1 resistor

1 capacitor

John

No I limit resistor in series with the LED? So what's the supply
voltage?

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

John Larkin · Jul 27, 2003

On Sat, 26 Jul 2003 17:30:12 -0700, Watson A.Name - 'Watt Sun'
<alondra101@hotmail.com> wrote:

In article <r316ivkv7s2jvqvt8t8rpj1bt0h81og2kr@4ax.com>,
jjlarkin@highlandSNIPtechTHISnologyPLEASE.com mentioned...
On 25 Jul 2003 12:09:11 -0700, testing_h@yahoo.com (Andre) wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

OK, here's an easy one:

1 SOT-23 TinyLogic gate

1 resistor

1 capacitor

John

No I limit resistor in series with the LED? So what's the supply
voltage?

Whatever makes the LED look good. If the resistor is big enough, you
can leave out the cap!

John

N. Thornton · Jul 27, 2003

testing_h@yahoo.com (Andre) wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

Hi

another one: resistor + capacitor + neon to make a neon flasher.
Supply V should be close to neon Vbreakdown. Now put LED in series
with the R so LED lights during C charging, but goes out as C nears
Vmax.

Of course you dont need the LED, you could in most cases leave that
out.

Regards, NT

Watson A.Name - 'Watt Sun · Jul 27, 2003

In article <a7076635.0307271049.10a532c5@posting.google.com>,
bigcat@meeow.co.uk mentioned...

testing_h@yahoo.com (Andre) wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

Hi

another one: resistor + capacitor + neon to make a neon flasher.
Supply V should be close to neon Vbreakdown. Now put LED in series
with the R so LED lights during C charging, but goes out as C nears
Vmax.

Of course you dont need the LED, you could in most cases leave that
out.

Which brings to mind the flasher that is shown on some electronics
websites. It is a LED and a C-B junction of a transistor, connected
so that it is reverse biased, and also a capacitor. It's here
http://members.shaw.ca/roma/ under Circuits, #23. The ones I've built
don't work. This is similar to a neon light flasher.

Regards, NT

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

Ian Stirling · Jul 28, 2003

In sci.electronics.misc Kevin McMurtrie <mcmurtri@sonic.net> wrote:

In article <2c2cf14c.0307251109.c958ad0@posting.google.com>,
testing_h@yahoo.com (Andre) wrote:

Hi group

Anyone got below 4 parts + LED (rules :- no chips with more than 4
pins, no PUTs or UJT's, no inductors, no hand picled parts ) ?

So far I have got down to 6 parts + LED, using a regulator IC .

-Andre

Apply tiny current through a blue LED backwards. Now run it under
normal conditions. It will flicker and flash as its damaged crystal
burns away.

Apply a really tiny current through a standard LED.
It will emit photons more or less randomly.
Only need a resistor.

--
http://inquisitor.i.am/ | mailto:inquisitor@i.am | Ian Stirling.
---------------------------+-------------------------+--------------------------
Prosperity and ruin issue from the power of the tongue.
Therefore, guard yourself against thoughtless speech.

Most novel LED flasher ?

Andre

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