Electronics > Beginners
Traffic light circuit with 556 timer?
phennessey:
Then the 556 is a piece of cake! Just remove the Vcc and ground from the second 555, and that’s basically it! :clap: :clap: :clap:
Can’t thank you enough for your work on this. I just had this sneaking suspicion that the reset on the 2nd 555 could be useful.
phennessey:
Here’s my attempt at a hand-drawn 556 circuit. I’m on vacation so this is as good as I can manage for the moment. Let me know if this is correct? I’m sure I botched something somewhere, and drew this inefficiently or just incorrectly. I’m not sure what I’m allowed to move. I’m trying to picture current flowing through this circuit and trying to think about what relationships I need to keep and which ones are flexible. This was a mind-melting exercise.
SmokeyTheElectrician:
With a quick glance, it looks good to me.
This is a really simple circuit, but / however,
formally, you could create netlists for both circuits,
then cross reference them to each other and
affirm all the components pins are connected to
the equivalent nodes between the two circuits.
phennessey:
No idea what a net list is or how to build one :) I’ll get googling!
My main concern was that I had fundamentally changed part of the circuit somewhere (changed a component from series to parallel, changed the order of something, etc).
james_s:
A netlist is just a list of nodes (such as pins on ICs) and what connects to what. You draw the schematic in the schematic editor and it creates the netlist for you, you don't have to directly manipulate it.
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