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

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38 views

tramsformer input output

I have one machine with transformer from 208 3 phase to 400 3 phase, what will happen if I connect the transformer to 360 V 3 phase as input is it will be okay or not? Because the machine comes from ...
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1answer
30 views

Selectively outputting 2 inputs based on a third input

I currently have 2 inputs that can be on or off, they could be 00, 01, 10, or 11. I want to output them only if a third input is active. I figured BJT transistors would do the job, but they seem ...
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2answers
36 views

When a datasheet specifies output current is it per pin or aggregated for all pins?

When a datasheet specifies something like output current, as with the 74FCT244 or for example, is this referring to the aggregated output current between all pins or the capacity of a single pin ? ...
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3answers
103 views

Get an output (like a voltage or dry contact closure) from any/most typical digital alarm clocks?

New to the community and less than a hobbyist so please advise if this question should go elsewhere. I am not noting a particular alarm clock or model because I would like this to be repeatable ...
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1answer
57 views

Fuse blown indicator circuits compilation

I have been working in a compilation of circuits to use that basically show to the user that a fuse has blown up, this is particulary useful in the bench, needless to say I haven’t tested all of them ...
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1answer
36 views

Confusion with output wiring and signal conditioning

I’m little confused about wiring and signal conditioning the following instrument: http://www.skypowerinternational.com/uploads/documents/4.3351.x0.140-161_WG-Geber-firstclass-advanced_analog_eng.pdf ...
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3answers
141 views

Do I really need the open loop output impedance of an op amp?

There are several answers on the internet and here on how to calculate the output impedance of the opamp with a given feedback. My intention, though, is to find this value with an open loop ...
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2answers
83 views

OUTPUT Impedance

I wish to find the output impedance of the circuit in the attachment. I have drawn the AC Equivalent of the circuit but I don't know how to come out with the Formula for the Output Impedance. I would ...
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3answers
291 views

How to read a push-pull output

I recently came across a sensor that had a "push-pull" output. I can't find anywhere how to read such an output: Is it some particular kind of analog output? I would want to read it with the ...
0
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1answer
80 views

using AD620 with load cell

I am currently using an AD620 to amplify the signal coming from my load cell. I am supplying it with single supply of 5V and 0V. Below is my preliminary circuit. I am feeding half the supply to the ...
2
votes
1answer
301 views

JK flip flop random start outputs

I am working on a project for college and I have to implement a sort of alarm using only MUX's and JK flip flops and a bread board. The problem I encountered is that whenever I power the whole circuit ...
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votes
2answers
262 views

Is there a way to find the transfer function from only your input and the steady state response?

I know that a transfer function has the general form of $$ G(S) = Y(S)/U(S) $$ where \$Y(S)\$ is the output and \$U(S)\$ is the input. However, if given the output \$u(t)\$ and the steady state ...
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3answers
48 views

SN74HC138 demultiplexer. How do I implement a switch?

I have this demultiplexer and I need to configure it in such a way that I can control 8 transistors using its outputs. They NEED to be NPN transistors, so when I select an output using the addresses, ...
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0answers
31 views

How to obtain a 50 hz 240 Vac from a 3 phase PMG unstable frequency supply?

I have read about using a rectifier, buck/boost then a inverter at the end to achieve my goal. But is there any easier way to do this? I may fix my generator rpm, but it may result in low frequency. I ...
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2answers
125 views

How to tristate output digital pin on a pic 16 series microcontroller?

I know that I can set digital output pins as high and low like this in c: OUTPUT_PIN = 1; OUTPUT_PIN = 0; Is there any way to set that said pin as tristate or ...
1
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1answer
74 views

Analog and Digital Output protection?

I know it's important to protect analog and digital inputs. My question is should you also protect outputs, both analog and digital? For the inputs, right now I'm using clamping diodes, an MOV, a ...
1
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1answer
51 views

How to calculate theoretically Output Impedance of a Linear Voltage Regulator

I am trying to calculate the output impedance of the following circuit, a linear voltage regulator. What is confusing me is the feedback coming from R1 and R2. I used R4= 500 ohms, R3 = 1K , R1= 25k ...
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3answers
87 views

Calculated output is greater than the op amp can produce?

I had to analyze a differentiator and integrator op amp. I am now asked the question of what would happen if the calculated output is greater than the op amp can produce? I am given a hint that it is ...
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1answer
38 views

Output Pin of Burleigh PZ-150 Amplifier Driver Analog High-Voltage Power Supply Unit

I have found a Burleigh PZ-150F Analog Amplifier Driver. However I could not locate the manual. What connector cables are compatible with the output port of this amplifier? It seems there are two male ...
2
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1answer
84 views

Transfer function of a real opamp circuit

I know how to calculate the transfer function of an ideal opamp. But when calculating for a real opamp, should I use the Input Bias Current values specified in the ...
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2answers
99 views

Convert perpetual magnet motor output to 5 volt DC

Disclaimer: Hi, I was in the neighborhood (StackOverFlow) and just noticed this cool site. I have had this general wondering for a while now and I am not sure if my question is constructive enough for ...
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0answers
75 views

1 Mbps satellite channel with a 270 ms delay

Consider 500 byte frames sends on a satellite channel with a 270 ms delay on send an receive by 1 Mbps rate. by ignore the length of ACK message and using Slide Window technique, how many bits need ...
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0answers
47 views

Linear time invariant system transfer function is known - calculate output signal

Here is my task: a) Calculate and sketch amplitude spectrum of u(t), b) u(t) is input signal for linear time invariant system whose transfer function H(jw) is shown. Calculate output signal uo(t) ...
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3answers
116 views

Recognising output impedance of an amplifier though inspection

The output impedance of FET amplifiers seem to be a hit and miss affair when I try to find it just through inspection. For example, sometimes it's easy to predict, whereas some other times I have to ...
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1answer
89 views

Input 5V 100mA, output 200mA

I am new to electronics. I have come across a problem which I face. Will need some advice from here, as I am a student and would like to know: is there any way I can increase current in a circle. ...
2
votes
1answer
194 views

Calculating the Output Resistance of a Widlar Current Source

I'm currently struggling to understand the small signal equivalent used in the following calculation: http://en.wikipedia.org/wiki/Widlar_current_source#Output_impedance My problem is: How come they ...
1
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1answer
49 views

Output impedance of a differential line receiver

Let's say I have an INA134 (http://www.ti.com/product/ina134) from Texas Instruments in my design. I want to take the output of that IC and feed it into a resistor network which can have a flexible ...
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0answers
60 views

Arbitrary difference between the output of multiple op-amps

We recently created a circuit where we were testing the voltage drops in a mesh network of resistors. We wanted to be able to apply arbitrary voltages between different nodes in the mesh network. ...
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2answers
61 views

Comparator Output Swing Measurement

i wan't to measure the maximum and minimum output swing of a Comparator. I'm using the circuit which you can find attached. However, since the Output of the Comparator (TI LM2903) is open drain, I ...
2
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4answers
232 views

Why do they usually make comparators open collector?

I never see open collector opamps while I frequently see open collector comparators. What is reason for preferring open collector output in comparators? (Inside of LM193.)
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0answers
48 views

Crystal Oscillator output voltages and power

I have built the crystal oscillator stage to the Pixie 2, a Hartley oscillator, with a 9 volt voltage source. I measured the output with my VOM set to AC 30 volts. It read almost 30 volts. That is ...
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2answers
266 views

Maximum op-amp output current

Im looking to drive an LED, but am not sure if i should use an op-amp or bjt configured as a switch. Is it possible for an op-amp to source roughly 10mA; the current needed to drive an LED in series ...
4
votes
2answers
133 views

Understanding resistors on inputs/outputs of op amps

I was looking at the schematic for Dave Jones' uCurrent, and I can't seem to make sense of why there are 270 ohm resistors on the inputs and outputs of the op amps in his circuit. The resistance is ...
2
votes
1answer
150 views

Differential pair output to voltage amplifier transistor

When designing an amplifier stage, like this, how does it work in a linear fashion? Suppose you're applying some feedback, the output may well be stabilized to zero, but the more "wrong" \$R_C\$ is ...
3
votes
1answer
548 views

Understanding this statement in ATmega328P's datasheet

While reading ATmega328P's datasheet, I came across the following statement. The Port X output buffers have symmetrical drive characteristics with both high sink and source capability. What does ...
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3answers
299 views

Will a dual car charger that shows a maximum output of 2000mA produce a 2.1A current?

I have a dual car charger that states input is 12-24VDC and Output is maximum of 2000mA, but it is supposed to have one port charge at 1A and other port charge at 2.1A. Is the 2.1A output possible ...
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2answers
113 views

Power Supply Current is very low

I made a power supply from a diy site, the schematics are above. The site showed the project as 2amps output but I'm not getting even close to that. I'm getting around .14A or less. Does anyone know ...
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2answers
51 views

the response of wireless channel to an input

I am reading the wireless of David Tse. In the 2nd chapter of this book there is a discussion about the response of the channel due to an input. It has said that since the channel is linear its output ...
0
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1answer
59 views

Capacitive load at the output for analysis of CMOS cells

This question is very rudimentary one. Please point me to the link if this question has been already asked. In general, when working with simulations and and analyzing the standard cells designed ...
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1answer
48 views

Operating a pump wit a PIR sensor

I need help with something I'm building because I've hit a dead end. I need this PIR sensor. To activate this pump off a 9v battery. The problem is the power output from the sensor isn't enough ...
1
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2answers
54 views

Expression and gate not gate output

The expression I came up with this circuit is A'B + A'CD + C, would the output change to AB' + AC'D' + C' since it is inverted? I'm assuming the D input compliments and cancels out? What would the ...
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2answers
134 views

Understanding circuit : Output of a CD4017 with 1N4148 diode and RC circuit

I'm reading a circuit on a magazine (look at circuit below) and i don't understand , why the author put a 1N4148 diode and a RC circuit at the output of CD4017 , what is the operations of the RC ...
2
votes
3answers
344 views

What kind of metal are the legs of resistors made from?

Can anyone tell me what kind of metal is used in electronics to make wires going in/out to the elements? Can longer of this metal wire be found anywhere? Actually I am looking for sth like copper wire ...
2
votes
1answer
158 views

12F683 output not behaving as expected

I have a 12F683 micro and this is my first program using the new MPLAB with XC8 compiler. I have configured Timer1 to trigger about every ms. For now I would need an LED to flash on and off but need ...
1
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1answer
383 views

CD4094BE Arduino problems

I'm trying to build a circuit which uses three 4094's to give me enough outputs to drive a number of LED's. I've built a few similar circuits before in the past using the same code and schematic, but ...
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5answers
252 views

Emulating a switch with open drain outputs

I need to replace mechanical switches with some kind of digital switch. Specifically I want to sent control inputs to various arcade games that use standard JAMMA inputs, which are basically switches ...
1
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1answer
333 views

Are disconnected PV panels damaged when exposed to sunlight?

Can PV solar panels be exposed to sun without being connected to controller and batteries? Have fixed panels on RV, and would like ability to switch (at controller input) to moveable panels on ground ...
1
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1answer
77 views

giving output bits of counter to logical gates in system generator

I have a counter block in system generator which has a 3 bit output. The block is shown below: As is apparent from the figure, it's output is represented by a single line not three. I need to give ...
1
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2answers
74 views

Need an extra pin to control my driver board

I've been searching for a way to add an extra pin to a driver board. The MCU board that i'm using only has 8 pins on the left side and i'm already using all of them. 2 are for powering the driver and ...
1
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4answers
77 views

Arduino Uno pin response speed

We are attempting to build a coilgun with multiple coils, and each coil needs to be energized and deenergized at precise time intervals. For cost (and inexperience) reasons, we are considering using ...