programing on-off switch

a.b.o.z. · Posted: Sun Oct 05, 2008 12:05 pm Post subject: programing on-off switch

Hi all.

I need sort of block diagram with logic elements to program single push on-off switch. I use quartz composer for my video sets.
In quartz I've got all sorts of logical and math, s&h modules.

So what I need is when I hit key it goes high and stays high and when I hit it again it goes low and stays low.

Can anyone point me in right direction to do this?

Thnx

DrJustice · Posted: Sun Oct 05, 2008 2:03 pm Post subject:

Below is an example of a debounced toggle switch. The first flip-flop is used to debounce the mechanical switch (SW1). The second flip-flop is used the toggle switch. The 7474 in the example has /PRE (preset) and /RST (reset) inputs that you can pulse low to select a predetermined state - typically the /RESET line in the system is connected to either of these so that the system is in a known state after power up.

a.b.o.z. · Posted: Mon Oct 06, 2008 2:48 am Post subject:

hei thnx.
There is no flip flop in quartz Sad

but good news is I found some article about that on apple archive.
It's done with counter (counts how many times key is hit) that number goes into math module with modulo (modulo 2) function wich result in 1 with odd and 0 with even numbers. Pretty simple at the end Very Happy