# 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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### plecs simulation of output impedance of switched capacitor(SC) converters

I am trying to simulate how output impedance of several DC/DC switched capacitor converters(dickson, ladder, and series-parallel) changes as switching frequency increases. I referred to several papers;...
58 views

### Output mode configuration on GPIOs: When to use push/pull vs open drain?

Hello guys I'm relatively new to Embedded engineering. I wanted to know if there's any specific rule that experienced embedded engineers use when selecting when to use one of these output ...
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### Confusion in deciding a voltage regulator's input output capacitor types

As a part of a PCB, I want to use this AMS1117-3.3 voltage regulator with 22uF input and output capacitors as follows: As for the exact part for the capacitors, I was planning to use this X7R ...
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### Issues with Audio Amplifier Circuit - No Output Signal with Capacitor, noise

I'm having trouble with an audio amplifier circuit that I designed, and I hope someone can help me figure out what's wrong. Here's the schematic of my circuit: Rsig is a variable resistor The circuit ...
97 views

### How to calculate $R_{out}$ in this multi-stage close loop?

The following circuit is from Chapter 13 of Analog Design Essentials written by Willy Sansen. Calculate $R_{out}$ for this circuit. The author thinks L_G = g_{m1} r_{o1} g_{m2} r_{o2} \frac{R_1} ...
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### Why does a half-bridge amplifier output half the voltage?

From a hobbyist's perspective, I can't/don't understand why the amp output voltage is only half of the supplied voltage. I am wondering if there is a trick to overcome this. This circuit schematic ...
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### Typical output characteristics table of an NPN transistor

The Ic - Vce table for the 2SC2411K transistor is given below. As it is known the right side of the table represent the breakdown region. That is, does the Vce > 5 V region enter the breakdown ...
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### Output of a stand-alone full wave rectifier is different from the one in the circuit in which it is implemented

I'm trying to simulate an evening lamp using a NE555 timer and a relay. To do so, I'm stepping down the 230V AC household voltage to 16V by an RC circuit as shown. Now, when I take a stand-alone ...
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### Ceiling fan dual color lighting switching

Some ceiling fans now have two different sets of LEDs, of different color temperatures, which are selected by switching the power on/off. I would like to know how this switching circuit works, it has ...
41 views

### Welder not passing current from a short pulse

I am trying to use a 5V control signal to operate a solid state relay (datasheet below) https://assets.rs-online.com/v1698808049/Datasheets/e3347be1ffb933a5483cd852b7d90659.pdf Once open, I would like ...
43 views

### When a typical fixed output voltage LDO is unpowered, is the output pulled to ground or is it floating/high impedance?

I am wondering since in a design the gate of a PMOS is pulled up by the output of a voltage regulator. Since the source of the PMOS still sees voltage on its source in that condition, I don't know if ...
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### Why Vout of the amplifier is equal to about 4*Vcc?

I am trying to understand working principles of attached class C inductance loaded power amplifier: Can you please explain how is it possible that RF OUT pp voltage is almost equal to 4Vcc? See ...
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1 vote
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### Voltage drops when trying to get high current from boost converter

I have designed a Boost converter which boost 5V input to 12V output. I designed it using TPS61378 boost converter IC by Texas instruments. I was able to get around 450mA current from the output ...
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1 vote
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### Reusing an output in Falstad

I'm simulating a logic circuit in Falstad and a particular output X is used multiple times in the circuit. Can I take input as X without drawing many wires from X?
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### Output of op-amp in Multisim and CircuitLab

I have two identical circuits of op-amp one in MultiSim and one in CircuitLab. They show different current out of the op-amp and I am not sure why. Here is the MultiSim circuit. In case it is not ...
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1 vote
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### Considerations for Output Capacitance in LDO and SMPS Circuits

In LDO or SMPS circuits, the maximum capacitive load is generally specified. Is the capacitance at the output of the LDO or SMPS circuit used after the SMPS LDO output also included in the output ...
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### IC 74HC08 can the output drive the input without destroying it? [closed]

i made a circuit with a 74HC08 and i wanted that when the output is high(1Y) it would take over contact (1B) with a led between it .and the input B connected to ground with a 20K resistor it works ...
55 views

### Load dependent output voltage power supply

I found a circuit that can be used to provide power from mains AC to various DC loads and I'm having trouble understanding how it varies the output voltage depending on the load resistance. It seems ...
47 views

### How to increase the Atmega32A input output pins

I’m using ATmega32A to control a system which have a 30 outputs and 30 inputs. The issue is that the ATmega32A have only 32 DIO pin which can be use as input output pins. So how can I increase the ...
1 vote
59 views

### 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 ...
1 vote
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### 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 ...
676 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 ...
1 vote
58 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 ...
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1 vote
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### 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: ...
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### 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 ...
267 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: ...
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### 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 ...
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### 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 ...
37 views

### 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 ...
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### 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 ...
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### 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 ...
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1 vote
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### 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 ...
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### 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 ...
313 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 ...
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1 vote
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### 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 ...
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### 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?
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### 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 ...
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1 vote
157 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.
94 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 ...
41 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 ...
1 vote
223 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 ...
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### 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 ...
1 vote
68 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?
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### 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) ...
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### 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 ...
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### 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?
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### 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 ...
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### 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 ...
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