| Number 2,3 and 4 are on the same page. |
Builder's Comment |
My Comment |
| Circuit 1 |
This schematic is my version of a
simple 10 LED chaser. There is no 555 timer used because at my local
electronics store they are over $4 Cdn. Instead, an oscillator made up of
two sections of a 4011 NAND gate is employed. This chip is very inexpensive
and extremely common. |
This is a pretty nice led
chaser(scanner). It is very cheap i built it for under 4$.The ICs are very
easy to find. But it does not go back and forth, it goes and it restarts
from the beginning. |
|
Circuit 2
(The 1st one on the page) |
The bi-directional sequencer uses a 4
bit binary up/down counter (CD4516) and two "1 of 8 line decoders" (74HC138
or 74HCT138) to generate the popular "Night Rider" display. |
This is a almost complete replica of
Knight Rider. But I found it pretty complicated... |
|
Circuit 3
(the 4th one.) |
N/A |
This one is like the 1st one. It may
be a little bit easier to build but also costs more. It does not go back and
forth. |
|
Circuit 4
(3rd one on page) |
The circuit below uses a hex Schmitt
Trigger inverter (74HC14) and two 8 bit Serial-In/Parallel-Out shift
registers (74HCT164 or 74HC164) to sequence 16 LEDs. |
This one is somewhat like the 1st one
but more complicated and it has 16 leds. It does not go back and forth. |
