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Electrical Engineering

Questions tagged [multivibrator]

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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 ...
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I wanted to know how to analyze this circuit so I can determine the potential V+, which theoretically should be variable. Image source: YouTube video Single supply op amp LM358 astable multivibrator ...
Sabrina Del Grande's user avatar
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As you probably know (I've posted several questions on this subject), I am trying to build a replica of the 1972 Magnavox Odyssey (full schematic here). However, it has yet to work properly. Currently,...
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I'm trying to design a guitar tuner. I made a Schmitt trigger to get a square wave, then connected it to a monostable multivibrator to generate a PWM signal. By using RC filter I should get clean ...
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I'm trying to build a frequency divider using discrete components (as a part of a hobby/learning project). The final goal is dividing an input signal of 32.768kHz to an output of 1Hz, by dividing the ...
notsurewhattodo's user avatar
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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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Goal: strobe a couple of led for a few seconds, have off for about a minute, cycle/repeat. I have several LM324, a couple 555, some 4017. 5v or 12v supply. Can I use one op amp as a timer (90% off, ...
user457503's user avatar
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I'm working on this clap-switch circuit and have already posted a question before. I've modified the circuit to toggle a motor with double claps. Here’s how it currently works: 1.A microphone receives ...
Mathew's user avatar
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In the above image, there is a bistable multivibrator circuit in Figure 1. The output of stage 1 of this circuit at \$V_{o1} \$ is supposed to be a square wave with a peak to peak voltage of 15 V with ...
Amit M'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 ...
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I tried to build an astable multivibrator to periodically run a vibration motor. I coupled the motor to the oscillator via a BJT. The circuit is: The expected collector voltage of Q3 is: To test the ...
Arad's user avatar
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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 ...
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I'm using this LED. I want to make this LED blink at MAX brightness (100 mA) at 1 Hz. I need to use a multivibrator and therefore can't use any IC chips. The circuit is powered by a 3.7V battery with ...
Simon Mayr's user avatar
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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 ...
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