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Electrical Engineering

Questions tagged [astable]

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The below circuit is transcribed from https://learnabout-electronics.org/Oscillators/osc41.php where the original circuit diagram may be found (Fig. 4.1.4). tao_r ...
Hammdist's user avatar
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I'm currently doing a project in Multisim and I've come across a weird behavior in my 555 timers. When I have the monostable (the output should be high for 11 seconds) and the astable timers on the ...
Abril Calatayud's user avatar
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2 answers
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Given the circuit in the figure: The operational amplifier and the diode are ideal. The power supply for the operational amplifier is symmetric: \$V^+ = -V^- = V_{cc} = 10 V \$. \$R \cdot C = 1 \, \...
Badr Eddine's user avatar
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1 answer
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Can this one cell LED driver work as an astable multivibrator? if so how is it compared to the Garner's Oscillator? They look very similar, are they the same? Is the inductor coil playing a ...
Tiago Pimenta's user avatar
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A friend of mine wants to modify a cheap solar lamp to make it breath (fade in and out continously). The LED runs on a 1.2 V NiMH battery. I'd like to design a circuit which could go in series with ...
tavis's user avatar
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I found this circuit scheme in my examples, and i think that this circuit wont work. Aside protection diodes of CMOS inverters, there is this diode pointing in the first inverter(left one), how I ...
Ognjen's user avatar
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2 votes
2 answers
285 views

I need a little help solving some electronics problem. I need to calculate the charging and discharging time of a capacitor in the following Schmitt trigger astable circuit using LM311 I found. If I ...
Andrija's user avatar
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1 vote
2 answers
148 views

I am currently trying to wrap my head around astable multivibrators. I want to design a circuit that oscilates at about 1 kHz. The formula I am using to determine the values for the base resistors (I ...
balu's user avatar
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1 answer
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I am designing an astable multivibrator that would avoid rounded output edges and also has a totem pole output, so it is able to drive a small charge pump. So I decided to replace a collector ...
Michal Podmanický's user avatar
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I need to produce a 1.7 MHz signal. Up to around 200 kHz the 555 IC and my simple astable circuit are working just fine as expected, but when I decrease R1 and R2 to less than 100 Ω the frequency ...
Vahid Heidary's user avatar
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5 votes
2 answers
228 views

Can someone explain what this extra LED between the bases of the transistors in an astable multivibrator does? I built the prototype and I see that without this LED there is no blinking. Both sides of ...
Evg's user avatar
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4 answers
398 views

I've recently started learning about astable multivibrators. I understand that the capacitors in a circuit like the one below create the alternating current by charging up one at a time, and once they ...
EskimoJones's user avatar
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1 answer
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I'm trying to build a basic square wave oscillator using an astable vibrator made with an op-amp for my Intro to Circuits class. Unfortunately, I cannot get LTspice to simulate the oscillations. I've ...
Jgely's user avatar
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421 views

I was looking at a dead Molex "Suitcase" terminal applicators and found on its controller board this 555 circuit. It appears to be an astable multivibrator, but not the typical kind. It ...
Erik Vincent's user avatar
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1 vote
1 answer
292 views

I have one problem with my project. I trying to measure capacitance with NE555, but i have problem with protection. In this schemeatic instead of a capacitor, I have put connection socket 01x02 for ...
Византија Исток's user avatar
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