I was hoping some could go over my schematic for 555 timer 3x3x3 led-cube
with an actual real pattern in it. Not just a CD4020 as seems to be popular
on the interwebs.
Sorry for the, somewhat messy, layout.
The 4000 series chips in gschem, seem to be missing power pins from
the symbols. So just assume the same ground and 4.5v supply for the 4029,
4514 and 4017 chips.
Pattern goes from layer 1 to 2 to 3 to 2 and then loops back
to beginning. 1st and 3rd layers are the same, 2nd layer is a reversed
version of it.
Spots that I think could problems.
1. 4029 counter's UP/DOWN pin's pull-down resistor.
2. The 4001 latch implementation.
3. 4514, strobe pin. Do I need to input a clock signal here to make it work?
4. The led circuit's general transistor structure and the base resistor values.
List of parts that I believe should provide working blinker.
* BC547B as the NPN transistors
* BC556B as the PNP transistors
* As for leds: 20mA, 2.6 Vdc
* 1N4004 as the diodes.
List of IC chips used with descriptions of their purpose and links to datasheets:
555: Used to generate clock signal for primary layer animation counter.
http://www.ti.com/lit/ds/symlink/ne555.pdfCD40001: NOR-gates, used to create a latch to switch animation direction.
https://www.fairchildsemi.com/datasheets/CD/CD4001BC.pdfCD4029: Used as 4bit binary counter.
http://www.ti.com/lit/ds/symlink/cd4029b.pdfCD4515: 4bit to 16 output decoding of the animation counter.
http://www.ti.com/lit/ds/symlink/cd4029b.pdfCD4017: Decade counter, used to switch between layers, at the end of an animation cycle.
http://pdf.datasheetcatalog.com/datasheets/90/108738_DS.pdfCD4070; XOR-gates to drive the layer power PNP-transistors with the CD4017.
http://datasheet.octopart.com/CD4070BCM-Fairchild-datasheet-76777.pdf