Questions tagged [output]

A signal or power being generated by one system for consumption by another, or a connection for that purpose.

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ATmega32A pins output issues

I’ve an issue with my ATmega32A in some of PORTC pins. I’m trying to control some LEDs using MCU but I faced an issue with PINC2,3,4,5 as shown in picture bellow. Off state (LED num 3,4,5,6 from the ...
abdalla zakaria's user avatar
1 vote
0 answers
40 views

A problem with an old computer PSU (schaffer-bv-223-5-04008)

I'm trying to find out the reason why an old PSU is not providing output voltage. Some times ago, I asked for help on retrocomputing (here is the thread: schaffer-bv-223-5-04008 unidentified ...
Ayeie Brazo's user avatar
3 votes
5 answers
568 views

LM358 output problem

I have a problem when using LM358 in compare mode. I'm trying supply LM358 with 5V (V+ = 5V, V- = GND). The non-inverting input is 0.6V and the inverting input is 0V and 1.2V, respectively. When the ...
Nhat Micls's user avatar
1 vote
2 answers
53 views

Coupling class-D output to audio input of another device

I have a MAX98357 with a class-D output stage that I want to use as the audio input to another device. The other device has a high-impedance (around 2.2 kΩ) input and ground connection. I was thinking ...
Acuario's user avatar
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2 answers
99 views

Delay in output relative to input

This is code for a lift (elevator). I am getting some delay in output. How can I get rid of these delays? Code: ...
had's user avatar
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0 answers
83 views

TINA-TI - trouble with boost converter based on LM5002

I wanted to recreate the LM5002 circuit in the TINA-TI program, which I encountered for the first time today. I was inspired by the circuit from the link below: LM5002 Unfortunately, the effects of ...
Proboszcz's user avatar
2 votes
1 answer
220 views

Is this the correct isolated circuit to control a relay output from a Raspberry Pi GPIO?

I am making a circuit for an optically isolated relay output controlled by a Raspberry Pi GPIO pin. I am not sure if this is the correct way of doing it. Can someone please help me out on this? Edit: ...
Praveen's user avatar
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2 answers
202 views

Driving SSR with ESP32 3.3V GPIO

I have made up a basic output circuit and it seems to work, but I'm not clear how to size the resistor. I'd like to make sure this works for the long term and I am not overlooking any details. How ...
Spy's user avatar
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0 votes
2 answers
92 views

UA741 output voltage

I am trying to calculate the output voltage of a UA741 with non-inverting input 5V and inverting input 3V. As I understand, Vout = Aol * (V+ - V-), but because Aol is very large and my op-amp is fed ...
chanC's user avatar
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0 answers
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Naming of the output with an unprotected open drain or open collector on the silkscreen

An issue has arisen regarding the pin labeling on the silkscreen. These pins are user-defined, so I want to clearly indicate that the output is transistor open-drain. As you may understand, it's a ...
Sig Elso's user avatar
0 votes
2 answers
42 views

Choosing points for analysing equivalent resistance

I realized there is something fundamental about equivalent resistance I don't understand in terms of application. I understand the part about mechanically simplifying resistors into one resistor, just ...
HFOrangefish's user avatar
6 votes
3 answers
413 views

Low LDO output capacitance (stability)

I need to replace the REG104 LDO (End of life) in a circuit where the max. allowed LDO output capacitance is 100 nF because of explosion proof intrinsic safety requirements. The REG104 LDO is stable ...
Stefan Wyss's user avatar
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1 vote
2 answers
66 views

Input/output resistance for an accelerometer/Wheatstone bridge

I am looking at the MS 3028 Piezoresistive Accelerometer. This is the internal schematic of the component, as a Wheatstone bridge, which per my understanding means it's a quarter bridge with other ...
HFOrangefish's user avatar
0 votes
1 answer
44 views

Increasing power of a standalone circuit board

I am a rookie at potentially upgrading some electronics and wanted to see if I could get a little direction on a potential first project. I purchased a small frequency generator and would like to ...
Scott Smith's user avatar
3 votes
1 answer
110 views

How to determine voltage level of the ultrasonic transducer?

I am designing the generator for an ultrasonic transducer for a cleaning system and I am not sure how to set the output voltage level. I measured the voltage level of the existing products, peak ...
hax's user avatar
  • 33
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70 views

Connect internal CRT's RGB to external LCD

In my boat i have a sonar with CRT monitor and no external video output. I would like to connect a LCD monitor instead. Schematic below show the RGB signals internally. Reg pic. My question is: If ...
Thor's user avatar
  • 11
2 votes
4 answers
185 views

Several base current values on the same graph

I need to have several base current values on the same graph with the output characteristics of the NPN transistor, which I set using Rb. How can I make them on the same graph?
wailoon's user avatar
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1 answer
73 views

How to read BJT output characteristic

What's the propper way to read current graph / output characteristic of BJT? Is it useful if there is no DC load line plotted? I'm very beginner and I thought that only possible operating points lay ...
Brutal's user avatar
  • 61
1 vote
3 answers
134 views

Dynamo current limiting circuit with LM317

I'm trying to lower current to about 20 mA, but even attaching a resistor of 50 Ω, I'm still not getting the regulated 20 mA or so current with the LM317.
Ruqayya Saleh's user avatar
0 votes
1 answer
78 views

How to divide 12V/15A buck converter output into two outputs with the same specs? [closed]

I am currently working on a project to build a mini-atx pc for a rover. Heres a simple schematic of it : The picoPSU Atx connector takes in 12V DC with a max of 15A peak and the zotac gpu 12V DC with ...
Christopher Lajoie's user avatar
0 votes
0 answers
40 views

How can I increase the output voltage without changing the motor and turbine design?

I made a small hydropower project for school. Water flow rate is too low. I attached 24 V DC gear motor. The output is 4 V. How can I increase it? I can not change the turbine dimensions and motor and ...
Zulfiqar Khan's user avatar
1 vote
1 answer
138 views

How to fix a broken relay that's still clicking?

Last week, one of my cooking plates was not working any more. I was able to track the problem down to the cooking plate relay (Finder relay type 45.61, 14Vdc, 16A, 250Vac). This relay still makes ...
Stefan Wyss's user avatar
  • 7,314
0 votes
1 answer
69 views

I am driving a LT3092 current source with a variable voltage - to get a variable DC current, but the output needs to float 0 to 1.5V above ground

What type of buffer amplifier would work - either discrete opamps or a differential output opamp? The output voltage would ideally vary up to 12VDC. The variable current source has a variable load ...
Charlie Landino's user avatar
1 vote
1 answer
58 views

What will the output voltage be from this inverter when supplied 9 or 18 V? [closed]

This is a circuit of DC to AC inverter I found online on a web site. Can anyone explain what will be output voltage if I give it 9 or 18 V from a DC battery?
Purv's user avatar
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2 votes
1 answer
69 views

Placement of filter capacitors in a circuit with multiple audio outputs

I have a multiple output stage of an audio circuit as in the picture attached. I want to add a capacitor to eventually filter any DC at the output, therefore I placed a RC filter 10uF/100k(0,16 HZ) ...
nhouse's user avatar
  • 53
2 votes
2 answers
653 views

STM32 - How to understand if GPIO is high current or not?

I'm working with the STM32F303 Microcontroller. The datasheet says that almost all pins are high-current, with the exception of analog inputs. I want to select multiple outputs to drive the ...
Delta's user avatar
  • 513
3 votes
2 answers
642 views

Darlington transistor configuration

Can two 2n2222a transistors output more than 1amp of current if biased properly; supposing 1.4v to 1.5v is applied to the base?
imran muhd's user avatar
0 votes
1 answer
40 views

Does the quality of USB cable affect the power drawn?

I was wondering how the power drawn is affected by different cable? I tested two different types: A USB cable plugged to a USB digital tester which showed a power of 4.88 V and 2A drawn, whereas the ...
Sujith's user avatar
  • 9
3 votes
2 answers
82 views

Could this circuit cause the MCU to fail?

I drive a common-cathode three digit 7-segment display (JSD-2832AUR) with an MCU (TM4C123GH6PGE). The circuit looks as follows: Distribution of the signals on the MCU ports: All ...
Velvet's user avatar
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0 votes
0 answers
57 views

The output of my instrumentation amplifier (INA121) is not seen in the microcontroller (MSP430)

I am using an INA121 instrumentation amplifier, and its output is 156 mV, but it is not seen in the microcontroller, it is just giving 0 like: I increased its output voltage (gain) by decreasing the ...
Merve Özdaş's user avatar
0 votes
3 answers
201 views

LM358 voltage follower output voltage progressively lower than input voltage (Vcc is much higher than Vin) [closed]

I have a voltage follower with LM358. Supply voltage is 12V. Input voltage is taken from 10k digital potentiometer. No load connected to the opamp output. In the table you can see the input and output ...
irilinir's user avatar
0 votes
1 answer
280 views

Why is a transformer hooked up to a 480v 208/120 experiencing voltage drop on the secondary side?

I'm experiencing some pretty drastic voltage drop on the output of a transformer as well. 480v 208/120v across the phases I'm getting 210 and phase to ground 80, 84 and 94. Just beginning to look for ...
Eric Weeber's user avatar
0 votes
1 answer
127 views

Pump control with a Raspberry Pi

Pump control Raspberry Pi I am planning to control a small water pump with my Raspberry Pi. The 24V pump needs quite a bit of current (~1A) so thats why I got a transistor output card with an I2C ...
Smudge's user avatar
  • 1
1 vote
1 answer
46 views

Usage of power supply with different output than input of consuming device [duplicate]

I'm about to use a power supply with output of 29V 1.8A for a device (linear actuator) with an input of 12V 5A. Is this a good plan regarding functionality and safety? I'm not even sure if this is a ...
MKorsch's user avatar
  • 113
1 vote
2 answers
229 views

How do I measure the output impedance of an inverting op-amp built with the LM741?

I am trying to measure the output impedance of an inverting op-amp. I tried it by connecting a variable resistor to the output. My objective was to use that resistor and output impedance as a voltage ...
Isuru Bhathiya's user avatar
0 votes
0 answers
57 views

TMC5160 the outputs signals do not work correctly

I have a Problem with TMC5160. I use the spi communication and I have measured the signal, they are correctly. But on Output of TMC5160 I have a problem. My MOS-FETS do not work correct. I measure on ...
Tartarus MuRFy's user avatar
1 vote
3 answers
260 views

I want to obtain 30 relay outputs using an optocoupler and ULN2803 [closed]

I am designing a PLC board using ESP32. This board will contain 30 relays. I want to design the protection circuit for these relays as shown in the upper left corner of the photo. Due to the high ...
Mehmet Emin ARSLAN's user avatar
0 votes
0 answers
59 views

How to fix this error on DAC0808 with LF351?

I am testing this schematic from the DAC0808 datasheet at 10kHz frequency digital input, current 0, 1 and 2 mA but output had error see fig.Vout should slightly than this. How can I decrease this ...
Phongpit Sribua's user avatar
0 votes
1 answer
78 views

Identify types of circuit(s) that would function as stated

I am trying to build a circuit that will have a trigger input, a clock input and an output that is (10) pulses at clock frequency for each trigger pulse. Would it be multiple circuits (chips) or just ...
bteddy1's user avatar
0 votes
1 answer
89 views

Exceeding max RPM of wind turbine [closed]

I have a wind turbine that reaches its max output power at 1000 RPM, and I want to know if there's any problem if I make it go faster than that (e.g. around 1250 RPM). I have a TESUP Yuzo. You can ...
Wave Rocker's user avatar
0 votes
1 answer
138 views

Can I use a power bank which shows output as 6V 9V 12V to run an RC car which uses 6 AA batteries? [closed]

I'm currently stuck at home and found an old RC car which uses 6 AA batteries. Buying new non rechargable batteries everytime i play with it is gonna be heavy on the pockets. I thought maybe if I can ...
Jerin C Mathew's user avatar
0 votes
1 answer
85 views

Cheap China solar water pump kit only runs for 10 minutes [closed]

I checked everything with a multimeter, everything seems fine. The batteries charge to full capacity. The output from the solar panel seems correct. The output from the controller seems correct. In ...
Matthew Nisbett's user avatar
0 votes
2 answers
46 views

Can I pull down with 5V logic a not-level shifted (which is at 2.8V logic pulled-up) input? How to pull it up to 2.8V again, with no level-shifters?

I have a Distance sensor which has an enable pin (XSHUT pin in the diagram) which is pulled high in its own PCB module at 2.8V, to enable it to work. My Attiny85 MCU, which controls the sensor, is at ...
Rodrigo's user avatar
  • 469
0 votes
0 answers
110 views

Transistor Re Model Input/Output Analysis

I have been trying to derive Av , Ai , Zi , Zo from a two port system model of a transistor. I know that the input voltage must be the voltage at the base to ground, and the output is from collector ...
Arcadius's user avatar
1 vote
1 answer
70 views

Designing an audio output circuit with 3 note polyphony for PIC18F45K20

Our project outputs three square waves from the PIC18 and is currently designed to go into an LM324 summing amplifier and then an LM386 audio amplifier to drive an 8ohm speaker. However, we have run ...
HCon's user avatar
  • 11
-1 votes
1 answer
104 views

Why is the output at the op-amp coming as 2.239 V?

What formula can be used to get this output? I tried using the superposition theorem but the output is not the same. Considering V1 off and V3 at 3 V: V- = 3 V (2k/5.32k) = 1.128 V. Considering V3 off ...
user642000's user avatar
0 votes
0 answers
67 views

Why is the output of OPAMP coming as 2.239V? [duplicate]

What formula can be used to get this output? I tried using superposition theorem but the output is not coming the same. Considering V1 off and V3 at 3V : V- = 3V (2k/5.32k) = 1.128V Considering V3 off ...
user642000's user avatar
1 vote
1 answer
105 views

24 V input, three 5 V outputs DC-DC buck converter design

I would like to make a DC-DC buck converter which has 24 V input and three 5 V outputs, but a typical buck converter circuits have only one output. How to change it to three outputs without an extra ...
hfsrg's user avatar
  • 13
4 votes
1 answer
102 views

What is causing the digital output of my MEMS pressure sensor to decrement continuously?

I'm a lowly mechanical engineer so bear with me. This problem has been the bane of my existence. I'm using a temperature-compensated barometric pressure sensor in a fluid-contacting application. ...
mere engineer's user avatar
1 vote
0 answers
23 views

Connecting a second power source to a drain of an OFF P-Mosfet

As a follow-up question to my previous question regarding a circuit that passes voltages above 17 V, I wanted to be sure how to connect output of the solution circuit to my application. The output is +...
Firas Abd El Gani's user avatar

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