All Questions
Tagged with proteus transistors
22 questions
0
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1
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288
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How to set relative voltages of a generic NPN transistor to desired values in Proteus 8
I've been trying to Simulate this circuit from Sadiku's Fundamentals of electronic circuits in Proteus 8. I already did the calculation in the exercise now I want to simulate it with proteus to ...
-1
votes
2
answers
225
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Why is the AC voltmeter showing zero volts in this inverter?
I used this video and created this, in Proteus:
When I run it I get zero AC volts:
But the video is showing this:
Why is the AC voltmeter showing zero volts in this inverter?
- 1
0
votes
1
answer
610
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Transistor parameter in Proteus
I am just learning the electronics and by the help of proteus I am learning the behaviors of different components.
Could someone please tell me how do I change the Emitter current values of a ...
- 286
0
votes
3
answers
323
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Why does the astable multivibrator using transistor not work when I use the same value of resistance for the collector of both the transistors?
The circuit shown in the figure does not run even in proteus. But when I change the collector resistance above 1.43k of one of the transistor, the circuit starts working. What's the reason behind such ...
- 57
0
votes
2
answers
152
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Why the amplifier AB does not amplify the signal?
I have this amplifier AB, but when I measure the signal with the digital oscilloscope, it does not amplify anything, (the yellow one is the output signal, and the blue is the Vin), also when I take ...
0
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1
answer
426
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I was trying to make this circuit on Proteus but this error appears
I was trying to make this circuit in Proteus as you can see but
"[SPICE] transient GMIN stepping at time=3.12737e-007"
error keeps appearing. How do I make this error go away?
1
vote
2
answers
108
views
Bad on output of Constant-Current source
What I'm trying to do?
I'm making a constant-current source based off an existing design. The specs of the existing design are:
Existing Design
The design is of a constant current source capable of ...
- 117
1
vote
1
answer
2k
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Transistor simulation not working properly in Proteus
I'm recently working with Proteus. So I created a simple schematic for a transistor to work as a switch. But when I simulate it, it doesn't work as it should. In the picture below you can see that the ...
1
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0
answers
378
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Problem simulating transistor on Proteus
I'm using PNP transistor to be a switch for CC pin of 7Segment (Common Anode) led and trying simulating it on Proteus at first. Something weird happens is that no matter high or low level at B gate, ...
- 51
0
votes
2
answers
355
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Understanding the 2N2222 transistor, Where is this voltage coming from
I was using Proteus to simulate NPN transistor then I saw this
Both Switches are open. Why I see 3.12 Volts
0
votes
1
answer
115
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Problems finding voltage between two points (transistor)
I am having a homework question about transistors where I am asked to find the voltage drop between the base and the collector (Vbc). I drew the circuit in Proteus but I am not sure where to put the ...
0
votes
1
answer
89
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Unstable in convert DC - DC chopper
The circuit DC to DC converter, using 555 to control the Vout, but my circuit waveform is not stable.
How can I fix this problem.
Waveform of Vout.
- 19
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1
answer
2k
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Why base emitter voltage (Vbe) of BJT is not showing as 0.7v in proteus simulation?
I was just trying to simulate a simple transistor circuit as common emitter in Proteus 8. However the I observe that the base-emitter voltage (Vbe) of the transistor 2N2222 is showing as 1.36v instead ...
- 103
0
votes
1
answer
800
views
What to do when you don't find an electric component in Proteus?
I am looking for this component: KSC1815. It is a NPN Epitaxial Silicon Transistor
The datasheet is here: http://www.futurlec.com/Transistors/C1815.shtml
But when I try to pick that component in ...
- 525
0
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2
answers
2k
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A constant current source simulation using transistor: problem in Proteus
Here, in the picture attached, I've simulated a constant current source using an NPN transistor, TIP series.
My task is to vary the R2 resistor and measuring the current change. This picture holds the ...
- 31
0
votes
1
answer
318
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Create a PCB scheme for circuit [closed]
This my first experiment trying to make a PCB circuit.
My main problem is that I want to make a project comping those four simple circuits in one or two pcb's (as I never try to something similar to ...
0
votes
2
answers
150
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Misunderstanding of amplifiying a current with transistor
Electrical books say that we can use transistor to amplifying current but when I simulate a circuit in proteus input current, it is smaller than emitter current but why?
This is a common collector ...
- 27
1
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2
answers
2k
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Why Beta value is changing and very low in this circuit
I am simulating a circuit in Proteus 8.1 and I am getting very low value of Beta (16 in this case). It is changing depending on the resistances. Can you please guide what is happening here? d
- 21
2
votes
2
answers
398
views
Adjustable power supply simulator/reality
Hi im a student of computer engineering and im currently doing a project of a adjustable power supply it should be doing 0-30V but im getting some problems with the word adjustable haha,i got this ...
0
votes
1
answer
2k
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Fire Alarm Circuit using transistor
This circuit is working inversely on PCB as compare to Proteus Software. In software, when the temperature increases the buzzer is on. This is the desired output, but on PCB this circuit is working ...
1
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4
answers
4k
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Proteus BJT Astable Multivibrator Simulation Error
I am pretty new in Proteus and made a simple flip flop circuit as shown below.
When I run the simulation, the circuit does not work as intended. Both of the LEDs light up at the same time. (LEDs ...
- 170
3
votes
2
answers
1k
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Heat Activated Alarm
I am working on a project in which I have to simulate a heat activated alarm. I have attached two images. One of which is a Proteus circuit image that i have made. When i start its simulation the ...
- 239