A littlebits puzzle

[Frankje]

Ready for another puzzle ?
Guess the circuit to obtain this special blinking led.
Here are a few hints
- 2 wire bits were used
- 1 logic gate was used
- no arduino bit ( this would be cheating, wouldn't it ? )
blinking LED
Greetings

[JackANDJude]

Cool idea, @frankje. Can we know how many Bits altogether were used or would that be too much information?

[Frankje]

All together, 10 bits were used including the wire bits and to give one more clue , an exclusive or bit was used as the logic gate.

[JackANDJude]

I'm not sure what you did, but here's my attempt:

Instagram Instagram post by Judith Brisson • Nov 18, 2017 at 12:50am UTC

[Frankje]

Hi @JackANDJude
It’s blinking for sure, but I think it’s not quite the same .
Can you provide your setup scheme ?
The solution is lurking around the corner ...

[alexpikkert]

I have no XOR bit........
But this one is an alternative solution I think......
power-split wire-NOR bit with a pulse bit on each input-inverter on the output--RGB led.
Notes:
. the output of the NOR bit does not trigger the led bit, it needs an inverter to trigger....
. it needs fiddeling with the pulse bits for ages to get the right result.
. it is a great method to learn more about the logic bits.....

[JackANDJude]

I had this circuit of 7 bits:
Power + split

• pulse + XOR

• micro sequencer + the XOR

• wire + rgb led

I feel like I could get it right with this circuit by fixing the timing. Maybe that's just wishful thinking?

[Frankje]

Hi @JackANDJude and @alexpikkert
No need to fiddle settings to achieve the correct blinking sequence.
If you look carefully, you’ll notice a logic pattern

Step 1 2 3 4 5 6 7 8
Clock. H. L. H. L. H. L. H. L
OUT. H. L. H. H. L. H. L. L

OK these are the bits used, up to you to connect them accordingly 😋

Wire, wire, power, LED, fork, pulse, latch, xor, inverter, latch
Happy puzzling !

And oh @alexpikkert, indeed, when you don’t have the XOR, it a true challenge to obtain the same blinking sequence.
An alternative is to use 5 Nand gates as pictured
NAND XOR GATE
Or the arduino after all 😜

[JackANDJude]

Instagram Instagram post by Judith Brisson • Nov 18, 2017 at 9:35pm UTC

[Frankje]

Congrats @JackANDJude
I think you found the solution 😀
The setup I choose differs, but the result is the same !
Try this circuit to check if I’m correct 😊

Power - pulse - fork - inverter - latch - latch - xor
- wire from 2nd branch of fork - xor
Output of xor to led via wire
👍