Veroboard traffic lights design help!

jussayinbr0 said:

hope im making progress?

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Indeed yes. But don't forget to put in the current limiting resistors for your LEDs before you submit it.

house0fwax said:

indeed yes. But don't forget to put in the current limiting resistors for your leds before you submit it.

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r7, r8, r9?

jussayinbr0 said:

r7, r8, r9?

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No. R3, R4 and R5.

R7, R8 and R9 are not needed and can be replaced with pieces of wire or some Veroboard tracks because the output transistors are emitter-followers that have very low base current.

R6 is also not needed and can be replaced with a piece of wire or a Veroboard track since it feeds the clock input of the CD4017 that uses no current.

jussayinbr0 said:

in derby?

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Yes, a LONG time ago - well before before it became a Uni.

It was a very interesting evening.