Alexandervvtaran

modified 6 years ago

Kind of toggle switch - 2

101

02:00:43

For my construction I need kind of triggers, which can be set simultaneously with reset all of other triggers. One of solution shown at the scheme. What can you say about it? Is there another simple solution?

published 6 years ago

hurz

6 years ago

working to many outputs via diode against supply or ground. This is like short circuit the outputs! You need some resistora. Anyway, instead of diodes use resistors. The feedback of each flip flop (thats what you have here, three RS FlipFlops) suppose to be a resistor.

lenzrulz

6 years ago

Hey Werner, how about showing him what needs to be done for proper circuit functionality by posting a link to a circuit which shows the solution?

roops1967

6 years ago

You need to decide are you only using logic gates or element components transistor,resistors, diodes, as gates. Guess it will be easier to use logic gates, heres one solution... http://everycircuit.com/circuit/6489843102908416

roops1967

6 years ago

You may know that you can make all other gates by using only NOR or NAND gates. So if you have a lot of quad NOR gate chips at hand then you can use 5 chips to make the solution I posted, 6 chips if they are NAND. But best just use a quad chip for each of the gate types, then you'll only need 3 chips ;)

roops1967

6 years ago

Here's another way of doing it, using SR latches (you can replace the NOR gate pairs with 'non-inverted' SR latches). This circuit may be unstable when started, it relies on the lamps to pull each latch down to off stable state. I haven't used SR latches on a chip, not sure if they're made to start in a predefined state...

roops1967

6 years ago

http://everycircuit.com/circuit/5311686169591808

hurz

6 years ago

Lenny here you started your first tech-talk within 5 years, but for some reasons you stopped, lol what a charlatan you are http://everycircuit.com/circuit/6046056991948800

hurz

6 years ago

ridiculous is this one, your advice is to make 100 steps back in inovation lol http://everycircuit.com/circuit/6326264978472960 typical charlatan advice

lenzrulz

6 years ago

You’re funny...😂

Alexandervvtaran

6 years ago

roops1967, thank you, i understand some things

Alexandervvtaran

6 years ago

hurz, thank you for comment about short-circuiting. i made my scheme "in iron". it works, but it can be unreliable, i see.

Alexandervvtaran

6 years ago

Some solution with extened set of triggers (4) http://everycircuit.com/circuit/5386500632739840

hurz

6 years ago

Lenny you see how easy it is to see its own mistakes. Lenny, you have a mental illness which does not let you see your own crap! You need help

lenzrulz

6 years ago

You need help respecting users requests not to post your comments on their circuits...😬

roops1967

6 years ago

Nicely expanded Alexander, you got that far then you understand most of it :) You say this for your construction, will you be building this?

roops1967

6 years ago

The circuit you got displayed above with the diodes and nands, you don't need the positive feedback diodes on the nands as rest of the circuit keeps the gates locked in hi or low states. As hurz mentioned the way it is configured the diodes are passing excessive currents causing shorts which won't be good to build. You can see this if you select a few of the diodes on the scope and watch how much current by pressing switches, slow down the sim speed to see this

roops1967

6 years ago

... or an easier way to see the excessive load, change the logic source to a 5v voltage source and scope the current on that, slow down the sim speed to 10th of what it is now, switch lamps and you will see current rocket to 3amps... ouch!

roops1967

6 years ago

It seems that instead of the nand outputs driving the other nand inputs low as you intended, the switchs are pulling the nand outputs hi... which would be the shorts!

roops1967

6 years ago

... if you really want you use your design with the nands and diodes, then put a 10ohm resistor between the switchs and the first nands. This will bring the switching current down to 300ma, still quite a load tho! But this design is not working in the way as you intended. Sorry for my info overload, your circuit had got me quite interested ;)

Alexandervvtaran

6 years ago

I already redesing my trigger set to only logic driving. There is no diodes more )). Thank you for advices. My electronic skills really at start position, especially in logic technics.

Alexandervvtaran

6 years ago

My device will control power supply unit to set predefined voltage. Four conditions: 5v, 9v, 12v and retunable state. My triggers will drive fixed resistors, and voltage on them will control power supply unit.

roops1967

6 years ago

Ah okay. Best of luck with your project :)

Alexandervvtaran

6 years ago

http://everycircuit.com/circuit/5992341849243648

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