EveryCircuit - impulse generator

fredi333

9 years ago

could someone help me please?

BillyT

9 years ago

Put an earth on the moving contact to make it an active part of the circuit.

fredi333

9 years ago

thx for the quick answer but it doesn´t work also :/

BillyT

9 years ago

The circuit appears different, I had 12v on top of the relay, and It worked for me, I just adjusted the potentiometer up and down and it open and closed.

2ctiby

9 years ago

http://everycircuit.com/circuit/5735650849980416

fredi333

9 years ago

thank you for your help now i got it :)

2ctiby

9 years ago

You are welcome freddi. The adjusted circuit is little more than a switch, maybe not quite what you were after but there is some fun stuff there to mess with for now.

hurz

9 years ago

Fredi, wenn das Relais schliesst, verursacht es einen Kurzschluss! OK, sind ja nur 12000A... Was willst/wolltest denn mit der Schaltung genau machen/erreichen. Kannst Du eine genaue Funktionsbeschreibung erstellen, damit die Leute hier nicht im Dunkeln tappen müssen und nur raten was Du wohl haben möchtest???????

2ctiby

9 years ago

@fredi333...notice that the relay to earth uses only approx 1mA current through it and the voltage across it is only approx 100mV. Bypassing that relay is insignificant and there is a high resistor in series at all times.....not a high current at any time....a real relay would be different values to those which I set here, but then a real relay would not cope with such rapid oscillations.

fredi333

9 years ago

Mein Ziel ist es eine Schaltung zu realisieren, mit der ich ein dauerhaftes Signal welches von einem Relais mit Wechslerausgang kommt in ein Impulssignal um zu wandeln. Eine zusätzliche Schwierigkeit dabei ist das beim ein- UND ausschalten des Relais ein Spannungsimpuls erzeugt werden soll. Ich habe das ganze jetzt nochmal anderst in mithilfe zweier RC-Glieder versucht: http://everycircuit.com/circuit/5173462548611072

fredi333

9 years ago

My destination is to realize a circuit that changes a permanent signal comming from a relais with a changeover contact into a impulse signal. One more difficult thing is, that the impulse signal should be produced when the relais is going to be activated AND deactivated Now I tried it on another way with two RC-circuits: http://everycircuit.com/circuit/5173462548611072

2ctiby

9 years ago

We are trying to work out what exactly you are looking for here. At this point it seems to me that you are trying to modulate a signal. Perhaps if Hurz would be kind enough to show one of his good earlier samples of simple modulation, then we can re-assess from there. Perhaps a 555 instead of transistors may be your way forward? We will all try to get you where you are wanting to go. Unfortunately, I do not understand your example circuit. Are you familiar with a '555 timer' and modulation?

hurz

9 years ago

The key for your circuit is the famous stinky blinky circuit you might have seen also million of times. Divide stinky bilnky into two half and see what it is, check this http://everycircuit.com/circuit/6132212428177408

2ctiby

9 years ago

This is perhaps what you are looking for, but with a 555 timer instead of transistors? http://everycircuit.com/circuit/6115098325680128

fredi333

9 years ago

Thank you for your help and the cool circuits you showed me but I´m not sure that they are the perfekt solution for what I want. But thats my foult. I haven´t explained exactly what I am looking for: I have got a changeover contact and everytime it switches i want to get a one to two second long signal which can switch a 12v relais or a 12v lamp or something like that

2ctiby

9 years ago

Then is this adapted Hurz schematic closer to what you want? http://everycircuit.com/circuit/6060645253906432

fredi333

9 years ago

yeah thanks a lot :) Now I tried it with two RC-circuits too: http://everycircuit.com/circuit/5173462548611072/permanent-signal-to-pulsed-signal I changed some values to fit better with the relais, I´m planning to use. What do you think about it? :)

2ctiby

9 years ago

Well if it all works as planned then that's a good job done. Enjoy it.

fredi333

9 years ago

yes I built it last week and everything works fine :D Thanks for you help :)