3 LEDs and 3 Switches..

Hi all.
Can anyone give me a diagram or help on how to do this..
I've got 3 LEDs, and 3 Momentry Switches.
Id like to make it so that 1 LED is on at all times.
eg.
123 - ABC
Press 1 and A Lights, BC off.
Press 2 and B Lights, AC off.
Press 3 and C Lights, BC off.
And so on. Defalut would be 1-A when inital power up is done.

I could do this dead easily with small relays, but Im trying not to use
them. Idealy it would use Transistors or a small chip.
The source is +5V fed from a 7805
Im trying to get away from the old Clicking way of doing it. !!

Any help on this would be very welcome.

Here is what its for.
http://www.youtube.com/watch?v=fT1mNeno8XY
The 3 Large LEDs at the bottom center.

Regards
Wombat.

Hi all.
Can anyone give me a diagram or help on how to do this..
I've got 3 LEDs, and 3 Momentry Switches.
Id like to make it so that 1 LED is on at all times.
eg.
123 - ABC
Press 1 and A Lights, BC off.
Press 2 and B Lights, AC off.
Press 3 and C Lights, BC off.

And so on. Defalut would be 1-A when inital power up is done.

I could do this dead easily with small relays, but Im trying not to use
them. Idealy it would use Transistors or a small chip.
The source is +5V fed from a 7805
Im trying to get away from the old Clicking way of doing it. !!

Any help on this would be very welcome.

On Thu, 16 Nov 2006 06:59:13 -0500, "Wombat-Pipex-News"
wombatppc_at_nospam_at_dsl.pipex.com> wrote:

Hi all.
Can anyone give me a diagram or help on how to do this..
I've got 3 LEDs, and 3 Momentry Switches.
Id like to make it so that 1 LED is on at all times.
eg.
123 - ABC
Press 1 and A Lights, BC off.
Press 2 and B Lights, AC off.
Press 3 and C Lights, BC off.

---
Press 3 and C lights, AB off, don't you mean?
---

And so on. Defalut would be 1-A when inital power up is done.

I could do this dead easily with small relays, but Im trying not to use
them. Idealy it would use Transistors or a small chip.
The source is +5V fed from a 7805
Im trying to get away from the old Clicking way of doing it. !!

Any help on this would be very welcome.

---
Schematic for you at:

news:cpqol2pr3beq657r88agpkq618biporh7f_at_4ax.com


--
JF

On Thu, 16 Nov 2006 06:59:13 -0500, "Wombat-Pipex-News"
wombatppc_at_nospam_at_dsl.pipex.com> wrote:

Hi all.
Can anyone give me a diagram or help on how to do this..
I've got 3 LEDs, and 3 Momentry Switches.
Id like to make it so that 1 LED is on at all times.
eg.
123 - ABC
Press 1 and A Lights, BC off.
Press 2 and B Lights, AC off.
Press 3 and C Lights, BC off.
And so on. Defalut would be 1-A when inital power up is done.

I could do this dead easily with small relays, but Im trying not to use
them. Idealy it would use Transistors or a small chip.
The source is +5V fed from a 7805
Im trying to get away from the old Clicking way of doing it. !!

Any help on this would be very welcome.

Here is what its for.
http://www.youtube.com/watch?v=fT1mNeno8XY
The 3 Large LEDs at the bottom center.

Regards
Wombat.


WEll, I don't see 3 large leds at teh bottom center, but...

Perhaps three flip-flops?

Doing it with one switch is really easy with a counter. (press and A
lights, press again, B lights, press again, C lights, and over again).

On Thu, 16 Nov 2006 06:59:13 -0500, "Wombat-Pipex-News"
wombatppc_at_nospam_at_dsl.pipex.com> wrote:

Hi all.
Can anyone give me a diagram or help on how to do this..
I've got 3 LEDs, and 3 Momentry Switches.
Id like to make it so that 1 LED is on at all times.
eg.
123 - ABC
Press 1 and A Lights, BC off.
Press 2 and B Lights, AC off.
Press 3 and C Lights, BC off.
And so on. Defalut would be 1-A when inital power up is done.

I could do this dead easily with small relays, but Im trying not to use
them. Idealy it would use Transistors or a small chip.
The source is +5V fed from a 7805
Im trying to get away from the old Clicking way of doing it. !!

Any help on this would be very welcome.

Here is what its for.
http://www.youtube.com/watch?v=fT1mNeno8XY
The 3 Large LEDs at the bottom center.

Regards
Wombat.


WEll, I don't see 3 large leds at teh bottom center, but...

Perhaps three flip-flops?

Doing it with one switch is really easy with a counter. (press and A
lights, press again, B lights, press again, C lights, and over again).

Just the Job dude.
Thanks.
I was Just looking at NOR, NAND type CMOS chips
http://www.doctronics.co.uk/4011.htm

Use full info.

Thanks again.

On Thu, 16 Nov 2006 08:53:58 -0500, "Wombat-Pipex-News"
wombatppc_at_nospam_at_dsl.pipex.com> wrote:


Just the Job dude.
Thanks.
I was Just looking at NOR, NAND type CMOS chips
http://www.doctronics.co.uk/4011.htm

Use full info.

Thanks again.

---
You're welcome. :-)

Check rev A, I forgot the LED current limiting resistors on the
original.


--
JF

Press 3 and C lights, AB off, don't you mean?
-----------

"John Fields" <jfields_at_austininstruments.com> wrote in message
news:muqol2drg238qi0m0buia3j7gv5nqt55st_at_4ax.com...
On Thu, 16 Nov 2006 06:59:13 -0500, "Wombat-Pipex-News"
wombatppc_at_nospam_at_dsl.pipex.com> wrote:

Hi all.
Can anyone give me a diagram or help on how to do this..
I've got 3 LEDs, and 3 Momentry Switches.
Id like to make it so that 1 LED is on at all times.
eg.
123 - ABC
Press 1 and A Lights, BC off.
Press 2 and B Lights, AC off.
Press 3 and C Lights, BC off.

---
Press 3 and C lights, AB off, don't you mean?
---

And so on. Defalut would be 1-A when inital power up is done.

I could do this dead easily with small relays, but Im trying not to use
them. Idealy it would use Transistors or a small chip.
The source is +5V fed from a 7805
Im trying to get away from the old Clicking way of doing it. !!

Any help on this would be very welcome.

---
Schematic for you at:

news:cpqol2pr3beq657r88agpkq618biporh7f_at_4ax.com


--
JF

Just the Job dude.
Thanks.
I was Just looking at NOR, NAND type CMOS chips
http://www.doctronics.co.uk/4011.htm

Use full info.

Thanks again.
Regards
Wombat

-----------
Press 3 and C lights, AB off, don't you mean?
-----------
Yaa. :-)

I presume on the diagram that the chips are already supplied by +5V to both
pin14s and GND on Pins 7.

Also on the second 74HC02 does the UC2 UCD pins 10 13 need grounding via a
resistor?

As the outputs would be High until the button was pressed.

Or can I just leave them unconnected.?

On Thu, 16 Nov 2006 10:21:40 -0500, "Wombat-Pipex-News"
wombatppc_at_nospam_at_dsl.pipex.com> wrote:

-----------
Press 3 and C lights, AB off, don't you mean?
-----------
Yaa. :-)

I presume on the diagram that the chips are already supplied by +5V to
both
pin14s and GND on Pins 7.

---
Yes.
---
Also on the second 74HC02 does the UC2 UCD pins 10 13 need grounding via a
resistor?

---
No.
---

As the outputs would be High until the button was pressed.

---
The outputs of U2C and U2D will _always_ be high, regardless of
whether S3 is made or not, since their inputs are wired to ground.

Notice that R5 is used to pull U2-5 down to 0V when S3 is open.
---

Or can I just leave them unconnected.?

---
Yes. They're outputs, so there's nothing critical about them.


--
JF

Thanks John.
Though Now you said that I can see where its at. Ive already done that side
of the design.
I was intending to run the LEDs via step down resistor and a Transistor.
Thats how the Voice box bit works, so I was just following on from that.
I understand why they are used.
Thanks again, will post a vid on YouTube once Ive finished the board.
Im also adding a DTMF Chip to the 8 LEDs to give of a small bleep as they
light.
Just wondering (as Ive not got a chip to play with) if the Tone is constent
from a 5089.?

Coz if it is Ill have to add a small cut off delay. Can't have the thing
bleeping for every.

On Thu, 16 Nov 2006 09:30:40 -0500, "Wombat-Pipex-News"
wombatppc_at_nospam_at_dsl.pipex.com> wrote:


Thanks John.
Though Now you said that I can see where its at. Ive already done that
side
of the design.
I was intending to run the LEDs via step down resistor and a Transistor.
Thats how the Voice box bit works, so I was just following on from that.
I understand why they are used.
Thanks again, will post a vid on YouTube once Ive finished the board.
Im also adding a DTMF Chip to the 8 LEDs to give of a small bleep as they
light.
Just wondering (as Ive not got a chip to play with) if the Tone is
constent
from a 5089.?

---
Yes. as long as TONE ENABLE is high and you've got valid row and
column inputs to the chip, you'll get a tone out. But why are you
planning on using a 5089 when you could easily make a gated
oscillator from the leftover NORs in my circuit?
---

Coz if it is Ill have to add a small cut off delay. Can't have the thing
bleeping for every. :-)

---
OK


--
JF

Dude its complicated enough !!
The 5089 looks simple from this diagram i have.
Im a hobby ist !!
:-)

"John Fields" <jfields_at_austininstruments.com> wrote in message
news:bb2pl2lcfeg1qs41vfg7a5l36tgcljlirn_at_4ax.com...
On Thu, 16 Nov 2006 09:30:40 -0500, "Wombat-Pipex-News"
wombatppc_at_nospam_at_dsl.pipex.com> wrote:


Thanks John.
Though Now you said that I can see where its at. Ive already done that
side
of the design.
I was intending to run the LEDs via step down resistor and a Transistor.
Thats how the Voice box bit works, so I was just following on from that.
I understand why they are used.
Thanks again, will post a vid on YouTube once Ive finished the board.
Im also adding a DTMF Chip to the 8 LEDs to give of a small bleep as they
light.
Just wondering (as Ive not got a chip to play with) if the Tone is
constent
from a 5089.?

---
Yes. as long as TONE ENABLE is high and you've got valid row and
column inputs to the chip, you'll get a tone out. But why are you
planning on using a 5089 when you could easily make a gated
oscillator from the leftover NORs in my circuit?
---

Coz if it is Ill have to add a small cut off delay. Can't have the thing
bleeping for every. :-)

---
OK


--
JF

Dude its complicated enough !!
The 5089 looks simple from this diagram i have.
Im a hobby ist !!