please help, i need this circuit to work :(

Tony Stewart

Well-Known Member

Most Helpful Member

• Nov 11, 2023

• #2

JK=1 to toggle pin 3&14 to v+ not gnd= Pin 11 = Gnd ,, schematic errors.

 

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Solution

T

timmychangga

New Member

• Nov 11, 2023

• #3

Tony Stewart said:

JK=1 to toggle pin 3&14 to v+ not gnd= Pin 11 = Gnd ,, schematic errors.

Click to expand...

Should i also remove the resistor 1 and 2 and make it 1k?

 

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Tony Stewart

Well-Known Member

Most Helpful Member

• Nov 11, 2023

• #4

That is not a good design to copy for many reasons. TTL on 6V, etc

I think you want to which may be a 20 Hz toggle LED flasher.

make the change I said for pulling J=K=hi.

 

Last edited: Nov 11, 2023

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Tony Stewart

Well-Known Member

Most Helpful Member

• Nov 11, 2023

• #5

https://www.electroschematics.com/1-hz-pulse-generator/

reduce the Cap C1 to 1uF for 10 Hz or 0.47uf for 20 Hz

 

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Tony Stewart

Well-Known Member

Most Helpful Member

• Nov 11, 2023

• #6

Try something like this on 5V

https://tinyurl.com/ys7mghat

 

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T

timmychangga

New Member

• Nov 11, 2023

• #7

thank you so much!

 

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Tony Stewart

Well-Known Member

Most Helpful Member

• Nov 11, 2023

• #8

The switch is interactive and the plot may be slower than the actual speed which you can adjust slider to 66% for approx real-time

If using CMOS 74HC73, then you are advised to connect floating inputs with 10k to 100k to gnd. Whereas for TTL floating inputs are approx 1.3V and recognized as a logic "1"

You can also open the switch and edit> momentary.

then use the mouse wheel to change any R or C to see the change in results. and Ctrl+z to undo.

or slowdown the chart recorder plot. with the mousewheel.

There are lots of other 555 designs and standard electronic designs and funky ones like > Circuits>Op Amps> Oscillators> Jerk

https://tinyurl.com/yujttt6j

 

Last edited: Nov 11, 2023

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Tony Stewart

Well-Known Member

Most Helpful Member

• Nov 11, 2023

• #9

or look at a light bulb take 10x rated power in slow motion (10%) as the filament heats up and rises in resistance then look at filament temperature.

https://tinyurl.com/yveptphk

Notice where on the plot is says 200W peak and 100W average after it heats up

If you can imagine it.
You can simulate it. (after you learn how)

 

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T

timmychangga

New Member

• Nov 11, 2023

• #10

do u have any flipflop circuits? my professor said that we need 3 flipflops in one circuit, but i dont know how to do it since it was not been lectures to us

 

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Tony Stewart

Well-Known Member

Most Helpful Member

• Nov 11, 2023

• #11

Falstad has all that .
use D or JK FF for registers , counters dividers.

>Circuits> Sequential Logic> counters> pick 1st or any, figure out how it works.

 

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timmychangga

New Member

• Nov 11, 2023

• #12

thank you so much for helping

 

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Tony Stewart

Well-Known Member

Most Helpful Member

• Nov 16, 2023

• #13

The schematic from Engineer's Garage has backwards LEDs and logic errors as if it was intentionally made wrong.

 

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S

shokjok

Member

• Nov 27, 2023

• #14

Tony Stewart said:

That is not a good design to copy for many reasons. TTL on 6V, etc

I think you want to which may be a 20 Hz toggle LED flasher.

make the change I said for pulling J=K=hi.

Click to expand...

It could work with a 74C73 or 74HC73 CMOS JK flip-flop IC.

 

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