Multivibrator circuit

161

03:48:44

Default settings on the transistors might be the problem. It dont start when turned on. If you flip the power on then off then on it starts. I put a push button for that. 

published 7 years ago

hurz

7 years ago

In this configuration the LED gets max 6.8mA even its a 10mA led, while the threshold voltage of 1.5V is more a infrared LED which makes invisible light. So why 1100 ohm as preresistor for this LED?

ClayCube

7 years ago

Without preresistor it comes up no solution

ClayCube

7 years ago

The 100 ohm resistor it don't matter the value if its not there it don't work

ClayCube

7 years ago

So i put a switch there and it worked still not just starting got to flip the power

lenzrulz

7 years ago

Self starting: http://everycircuit.com/circuit/5756151852695552

ClayCube

7 years ago

I like this app even when it don't work right

BillyT

7 years ago

@lenzrulz, Like your circuit, @ClayCube while the simulator is a bit basic, it definitely cannot allow for poor design.

lenzrulz

7 years ago

Thanks Billy

ClayCube

7 years ago

The design not poor it works in real life

hurz

7 years ago

@ClayCube, your LED is by magic now 3V 6mA, while it was yesterday 1.5V 10mA. Were does comes this transformation over night?

ClayCube

7 years ago

Theres no 100 ohm. To still not simulating 100%

BillyT

7 years ago

Ok, @ClayCube, here is one way how it might be achieved; http://everycircuit.com/circuit/5260486185844736

BillyT

7 years ago

And a FET version; http://everycircuit.com/circuit/5418612553940992

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