Falstad Simulation Code

kdjsfkljsdklfsdjkl

Circuit - Electronic Counting Circuits (Mullard) pg50

This circuit looked nice and simple and I was hoping it would work.

But unfortunately when I simulate it, it does nothing.  Note: in all non-working circuits, I try to vary the values of the components slightly to make them "non-ideal" in the hopes of making the simulation happy, but it never works.

$ 1 0.000005 10.20027730826997 50 5 50 5e-11
t 304 288 288 288 0 -1 11.999999634049626 -3.50220302536286e-7 100 default
t 288 352 320 352 0 1 -11.999999634049626 -0.017941986302412765 100 default
w 288 304 288 352 0
w 304 288 320 288 0
w 320 288 320 336 0
r 288 272 288 208 0 1000
r 320 288 320 208 0 10000
r 288 352 288 576 0 100
162 320 368 320 448 2 default-led 1 0 0 0.01
r 320 448 320 544 0 100
c 320 448 528 368 0 1e-8 -0.000010990543284541271 0
R 112 560 80 560 1 2 100 3 3 0 0.5
t 144 560 176 560 0 1 0.5791278815406252 0.5970561342582993 100 default
r 112 560 144 560 0 10000
g 176 576 176 640 0 0
c 528 448 736 368 0 1e-8 -0.000010990548536399247 0
r 528 448 528 544 0 100
162 528 368 528 448 2 default-led 1 0 0 0.01
r 496 352 496 560 0 100
r 528 288 528 208 0 10000
r 496 272 496 208 0 1000
w 528 288 528 336 0
w 512 288 528 288 0
w 496 304 496 352 0
t 496 352 528 352 0 1 -11.999999634049546 -0.01793924083428508 100 default
t 512 288 496 288 0 -1 11.999999634049546 -3.5022038247234377e-7 100 default
c 736 448 864 384 0 8e-9 -0.000013736011924496416 0
r 736 448 736 544 0 100
162 736 368 736 448 2 default-led 1 0 0 0.01
r 704 352 704 576 0 100
r 736 288 736 208 0 10000
r 704 272 704 208 0 1000
w 736 288 736 336 0
w 720 288 736 288 0
w 704 304 704 352 0
t 704 352 736 352 0 1 -11.999999634049546 -0.01793924083928702 100 default
t 720 288 704 288 0 -1 11.999999634049546 -3.5022038247234377e-7 100 default
w 736 208 704 208 0
w 704 208 528 208 0
w 528 208 496 208 0
w 496 208 320 208 0
w 320 208 288 208 0
w 288 208 176 208 0
v 176 272 176 208 0 0 40 12 0 0 0.5
g 176 272 176 304 0 0
w 864 384 864 128 0
w 864 128 240 128 0
w 240 128 240 368 0
w 240 368 320 368 0
w 176 544 320 544 0
w 320 544 528 544 0
w 528 544 736 544 0
w 176 576 288 576 0
w 288 576 496 576 0
w 496 560 496 576 0
w 496 576 704 576 0

Circuit - "Alan Yates"

The above circuit was obtained from Alan Yate's page:

Alan Yates Ring Counter

$ 1 0.000005 14.235633750745258 44 5 50 5e-11
r 64 368 112 368 0 10000
R 64 368 32 368 1 2 200 3 3 0 0.5
t 112 368 144 368 0 1 -5.135592176334875 5.235592178845508e-8 100 default
g 144 384 144 432 0 0
t 320 432 288 432 0 -1 5.3615350109423945 1.093569627078561 100 default
t 288 496 320 496 0 1 -5.3615350109423945 1.5191081027469378e-7 100 default
w 320 432 320 480 0
w 288 448 288 496 0
r 288 496 288 544 0 10000
w 320 512 320 544 0
w 320 544 288 544 0
g 288 672 288 688 0 0
w 288 416 288 384 0
w 288 384 320 384 0
162 320 352 320 384 2 default-led 1 0 0 0.01
r 320 352 320 304 0 100
c 320 352 496 352 0 1e-8 0.7562632690591222 0
c 528 352 704 352 0 1e-8 4.41732030103937 0
r 528 352 528 304 0 100
162 528 352 528 384 2 default-led 1 0 0 0.01
w 496 384 528 384 0
w 496 416 496 384 0
w 528 544 496 544 0
w 528 512 528 544 0
r 496 496 496 544 0 10000
w 496 448 496 496 0
w 528 432 528 480 0
t 496 496 528 496 0 1 -5.361535009840701 1.5302363112593457e-7 100 default
t 528 432 496 432 0 -1 5.361535009840701 0.9822575137210956 100 default
c 736 352 848 352 0 8e-9 -1.674671540687966 0
r 736 352 736 304 0 100
162 736 352 736 384 2 default-led 1 0 0 0.01
w 704 384 736 384 0
w 704 416 704 384 0
w 736 544 704 544 0
w 736 512 736 544 0
r 704 496 704 544 0 10000
w 704 448 704 496 0
w 736 432 736 480 0
t 704 496 736 496 0 1 0.6604777284509364 0.6895211691227966 100 default
t 736 432 704 432 0 -1 -0.6604777284509364 -0.6892047834861982 100 default
w 320 304 528 304 0
w 528 304 736 304 0
w 144 352 144 304 0
w 848 352 848 256 0
w 848 256 288 256 0
w 288 256 288 384 0
w 736 304 864 304 0
r 864 304 912 304 0 270
w 912 304 944 304 0
w 944 304 944 416 0
t 1008 448 944 448 0 1 -6.0453982550762255 0.5930664181052041 100 default
w 944 416 944 432 0
c 944 464 944 560 0 0.000009999999999999999 5.36153532681857 0.001
r 320 432 384 432 0 10000
r 528 432 592 432 0 10000
r 736 432 800 432 0 10000
w 384 432 384 576 0
w 592 432 592 576 0
w 800 432 800 576 0
w 384 576 592 576 0
w 592 576 800 576 0
w 800 432 848 432 0
r 848 432 848 512 0 10000
r 1008 448 1008 304 0 10000
r 1008 448 1008 544 0 10000
v 1056 432 1056 304 0 0 40 12 0 0 0.5
w 496 352 496 384 0
w 704 352 704 384 0
w 944 464 912 464 0
w 912 464 912 432 0
w 912 432 848 432 0
w 320 304 160 304 0
w 160 304 144 304 0
w 288 640 288 672 0
w 496 544 496 640 0
w 496 640 288 640 0
w 704 544 704 640 0
w 704 640 496 640 0
w 848 512 848 640 0
w 848 640 704 640 0
w 944 560 944 640 0
w 944 640 848 640 0
w 1008 544 1008 640 0
w 976 640 944 640 0
w 1056 432 1056 640 0
w 288 544 288 640 0
w 1056 640 1008 640 0
w 1008 640 976 640 0
w 1056 304 1008 304 0
w 1008 304 944 304 0
d 352 384 368 384 2 default

Notice the NPN transistor that is driving the transistor bases, it is configured as an emitter follower with voltage divider input.  If I remove the transistor keeping the voltage divider, the counter still works.  So maybe the transistor isn't strictly necessary.  I am not sure.

And here is the falstad code:

$ 1 0.000005 14.235633750745258 44 5 50 5e-11
r 64 368 112 368 0 10000
R 64 368 32 368 1 2 200 3 3 0 0.5
t 112 368 144 368 0 1 -5.131476983752162 5.23147699261485e-8 100 default
g 144 384 144 432 0 0
t 320 432 288 432 0 -1 2.809708337000875 -0.5192943894697342 100 default
t 288 496 320 496 0 1 -2.809708337000875 0.5188950643520817 100 default
w 320 432 320 480 0
w 288 448 288 496 0
r 288 496 288 544 0 10000
w 320 512 320 544 0
w 320 544 288 544 0
g 288 544 288 560 0 0
w 288 416 288 384 0
w 288 384 320 384 0
162 320 352 320 384 2 default-led 1 0 0 0.01
r 320 352 320 304 0 100
c 320 352 496 352 0 1e-8 4.4080778843656825 0
c 528 352 704 352 0 1e-8 -1.6147684484980505 0
r 528 352 528 304 0 100
162 528 352 528 384 2 default-led 1 0 0 0.01
w 496 384 528 384 0
w 496 416 496 384 0
g 496 544 496 560 0 0
w 528 544 496 544 0
w 528 512 528 544 0
r 496 496 496 544 0 10000
w 496 448 496 496 0
w 528 432 528 480 0
t 496 496 528 496...