NAND Blinkerschaltung

196

03:37:08

I have a problem with this circuit. LEDs must blink with a frequency 2Hz, but it doesn't work.  Please help.

published 12 years ago

LongFist

12 years ago

You could start by adding a voltage source, to power the circuit. The simulator is pretty thorough. After that, it's just tuning your r/c timing...

LongFist

12 years ago

Also, at second look, wouldn't the r/c side of that circuit better serve your needs if it were charging/releasing on the input side of your NAND gate? Over where you've got it, it has no appreciable effect on the input/flashing side of the circuit. *Just an observation, not criticism. I'm just worried that if I made this circuit work, I might just be doing somebody else's homework assignment...

Hamsterdog

12 years ago

Don't worry ), it's not my homework its just a little hobby. I have a bought an elektronik training kit for beginner in digital elektronik. This circuit works in a praxis, but i don't really know what have I done wrong in this scheme. You can take a look, if you want, www.elektronik-labor.de/Lernpakete/LPdigital.html circuit number 9.

hurz

12 years ago

Real funktioniert diese Art von Oszillator sehr gut, auch wenn sie die Digitaltechnik vergewaltigen. Für einen Simulator ist es die "Höchststrafe" die analoge und digitale Welt Zeitgleich nachzuempfinden, simulieren. Dieser Simulator kommt hier leider an seine Grenzen

LongFist

12 years ago

I'm not sure EveryCircuit really *knows* IC circuits. I just released a NAND LED Flasher Circuit, a real, live, functioning circuit from my workbench, and yet EveryCircuit responds with 'cannot find solution'. Not sure what to make of that. So go find that circuit, and build on it, and you'll be fine. Again, it works in real life, just not in EveryCircuit, the simulator.

hurz

12 years ago

The one with single gate is working in real? You are lucky

LongFist

12 years ago

Apparently I am lucky. Other students in class were having troubles with it. Now I wonder if I wasn't "benefitting" from some nearby interference, or if there was a flaw in the project board that enabled this behavior...

Hamsterdog

12 years ago

Thank you all for the answers. Hurz, you mean it's difficult for this program to solve analog and digital problem at once. Its really not easy to solve beginning-problem in this circuit. What do you mean I can do better, to make this problem digital? LongFirst, I try to put together your circuit its pretty nice).

hurz

12 years ago

Ich sagte nur, dass der Simulator sehr schnell überfordert ist und leider eben auch mit so scheinbar einfachen Anfängerschaltungen. Eine einfache Lösung ist nachbauen. Macht auch mehr Spass!

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