Analog circuits have a range of voltages, rather than just two as in digital logic.

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2answers
41 views

Load cell, help

I am using load cell, from here. Load cell specification are mentioned on the site. 5 wire coming out, its a 4 wire core shielded load cell. What screwing thing i am facing is: Getting same voltage ...
1
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2answers
46 views

Switching between two sine waves using analog circuitry

I'm trying to do a project entirely using analog circuitry. The project involves switching between two sine waves at a constant frequency to power a speaker. I am using a Wien-bridge oscillator to ...
0
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2answers
78 views

Working of Wien Bridge Oscillator

I am studying Wien Bridge Oscillator. The part I do not understand is how the other frequencies die out. For example, let us say initial disturbance was not of the resonant frequency but a higher ...
2
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4answers
101 views

Voltage divider for battery monitor ADC - loading effect?

I'm building a voltage divider to use for feeding into an ADC to determine the battery voltage of a device I'm designing. Is it important to consider the input impedance in the ADC and to account for ...
-1
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2answers
62 views

Off Resistance of Analog Switch 4066 pretty low?

I am trying to use an analog switch to switch signals between my end nodes. Before I tried in actual circuit, I wanted to try it in a test circuit. As, 4066 can act as a switch for both Analog and ...
0
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1answer
31 views

How much is the noise of a multiplexer for analog inputs?

I have 4 sensors, each have with two differential output (S- and S+) that I need to use in a differential amplifier (with a gain equals to 1000 in my case). The difference between S- and S+ is ...
0
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2answers
71 views

How to choose Decoupling capacitor? [closed]

I am designing simple monitoring application circuit, used 3analog inputs. Im confused that how to choose decoupling capacitor for that dc voltage stability and analog inputs. What kind of capacitor ...
2
votes
1answer
59 views

Light Organ — Need help with LED grid

I'm building a light organ for a school project. I've got a crossover to separate the frequencies, now I need to make an LED grid. The input will be an constantly changing analog signal (whose ...
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0answers
27 views

Connect electret mics to computer [closed]

I'm trying to do cross correlation on the signals arriving at a microphone pair. I do not want to record anything. Before doing this on a development board (like the beaglebone/board), I decided to ...
0
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0answers
31 views

Design of ALU use both PTL and adiabatic Logic

Adder module of My 4 bit ALU use 6 Transistor PTL circuit,to reduce power consumption. For further reduction in power consumption can I use 2:1 and 4:1 adibatic mux or there is some kind of ...
1
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1answer
58 views

designing LC filter for linearizing PWM output

I have designed an h-bridge to run a TEC element. The circuit outputs output current is 4A output voltage is 4V Runs on PWM with frequency 5kHz Load resistance is 75Ω I wanted to linearize the ...
0
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1answer
59 views

Need comments on low noise band-pass filter design

I am a beginner in filter design. This is the bandpass filter and its central frequency is 2kHz. Would you please give me some comments on this design?
0
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1answer
57 views

Real-life discrete monoflop

I my current project I need a high-side PMOS to disconnect a load once a over-current or (downstream) over-voltage condition is detected. Obviously without a permanent latch, once the PMOS opens, a ...
0
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2answers
34 views

Inverted signal in biopotential circuit

Im building an sEMG circuit and am a bit confused on how to change the signal back to non inverted before the output.The signal goes -> amplifier (x16)-> high pass filter -> variable amplifier ...
2
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0answers
29 views

OPAMP common mode half circuit with its gain

I have a really complex circuit as shown: M4,M7,M14,M15 all pmos the others->nmos I am asked to draw common/differential mode half circuit. What I don't know: How to deal with M14, M15? Which ...
0
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1answer
53 views

ADC Analog & Digital Supply?

I'm working on a circuit based on ADC and DAC. I understand that keeping ground plane of analog and digital section different is crucial in many applications for reducing digital noise interference ...
2
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1answer
59 views

Input impedance of a transistor amplifier from an example

Going on reading "The Art of Electronics", I am still stuck on another input impedance calculation for a transistor amplifier. This is really something I should overcome, maybe your explications will ...
1
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1answer
44 views

Reading analog sensor as a microphone signal (via sound card)

I was thinking and studying on how an analog-digital-converter works and just realised that the sound card of every computer-devices is exactly that one. My question is: how can I read an analog ...
0
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0answers
56 views

Thevenin equivalent of a transistor

I get the idea of how to calculate a Thevenin equivalent, but I'm having troubles applying that for transistors. In "The Art of Electronics" from Horowitz & Hill (2nd edition, p66) the input ...
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0answers
28 views

Convert Analog Based Full Adder Circuit into CMOS Based circuit?

I am working on PTL(Pass transistor logic) ALU for improvement in dynamic power i reduce transistor count from 8(Traditional Design ) to 6 for its adder module. assume transistor as ideal one.circuit ...
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0answers
56 views

100kHz active filter design

I am designing a basic 100kHz active bandpass filter using opamps (LF353). I am only interested in receiving the 100kHz frequency (might drift a few kHz) from my input signal. I have used a basic ...
0
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1answer
48 views

Review and question about AD9838 circuit

I have tried to come up with a schematic of using AD9838. I used the eval. board schematic and modified it to my needs. The eval. board schematic can be found on page 9 here: AD9838 eval. board ...
1
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1answer
29 views

Input voltage for the ADC PCM1807

In the datasheet (http://www.ti.com/lit/gpn/pcm1807) of the Texas Instruments PCM1807 in section ABSOLUTE MAXIMUM RATINGS (page 2) it says Analog Input Voltage \$V_{IN}L,V_{IN}R,V_{REF}\$: \$-0.3V ...
0
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1answer
55 views

How to filter low frequency noise on power supply from ChipCorder?

I've built a circuit using an ISD4003 ChipCorder, which is an IC for recording and playback of audio (in a telephone answering machine, for example). I've written code to send the SPI commands to ...
0
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1answer
43 views

Switching Between an Analog Sensor and a Digital Sensor

I am working on a project that reads sensor data from multiple sensors. I am trying to come up with a universal solution for connecting these sensors, and have decided to go with a 4P4C Modular Jack ...
0
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1answer
67 views

How do I calculate the capacitor value (Farad & Voltage) given the pulse current, pulse duration & maximum tolerable voltage drop?

I have an electronic component with following characteristics: Operating voltage: 4.5V Peak operating current: 2000mA for 600uS every 4000uS. The device can ...
3
votes
2answers
370 views

How do I make an LED turn on when my output reaches 5v?

I'm a hobbyist and pretty new to many of the components involved, so I hope you guys can help me here. I'm trying to keep the circuit as simple as possible. I made a small variable power supply with ...
5
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4answers
545 views

How can I slow down the switch time of a MOSFET?

I have an NMOS that is switching too fast for my application. Into the gate I am sending a logic-level square wave (PWM). Unfortunately for me, as expected, the output is also a near square wave. How ...
2
votes
3answers
178 views

Beginner A to D Converter

I'm trying to understand the readings I am receiving from the analog to digital converter (ADC). I am using an integrated uIceblue2 microcontroller. The microcontroller in the circuit is a 18F4550. ...
4
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1answer
63 views

Analog to 1-channel Digital Converter

I have 0-5 V analog value coming in, and I need to convert it to a high or low 5V digital signal. Essentially, I need to create a 1-channel A/D converter. The idea is that when my analog voltage ...
3
votes
5answers
239 views

How to mirror resistor? (use same variable resistance for multiple op-amp gains)

I want to create parallel op-amp circuits/channels and use the value from a single potentiometer to adjust the gains of each uniformly by making each op-amp see a 'copy' of the resistance to set the ...
2
votes
1answer
95 views

post equalising technique &opamp circuit

I have tried to construct this circuit in LT spice as to compensate the imperfect of DAC of my DDS function generator,for my case fs=125MHz,thus C=6.6pF, and the result as shown :, how do I verify it ...
0
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1answer
79 views

Analog multiplier using logarithmic and anti-logarithmic opamp issue

I'm trying to build a analog multiplier that takes in two voltages and produces the product of them. I have tried to simulate a circuit with finds the log of two voltages, sum them and then find the ...
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0answers
30 views

Can Position Sensitive Detectors electrodes be offset? How?

I've got a prototype board of a light tracking device based on a 2 dimensional PSD, but it suffers from important bias currents on one of the electrodes which could possibly clip the input to the ...
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2answers
120 views

Filter 50Hz hum picked up by the oscilloscope

I am measuring huge 50Hz oscillations on my oscilloscope, but I am not entirely sure the probe is generating those by behaving like an antenna (an ADC at the same point gives stable values but it's ...
4
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3answers
290 views

How to Debouce Six Buttons on One Analog Pin With Arduino

I'm using analog pin 5 on Arduino to detect presses from 6 push-buttons. On the picture top-right button is number 1 and then from right to left they go as 2, 3, 4, 5, 6. Program should print 0 when ...
3
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3answers
103 views

How is abstraction used in Analogue circuit design?

Digital circuit design is a domain in which we abstract a complex analogue transistor circuit as a logic gate, effectively abstracting away even the electrical nature of the device as we use boolean ...
2
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2answers
61 views

Door phone audio signal to pc soundcard

I need to interface door phone system to a pc soundcard to listen and talk to the external unit. The door phone to interface is an as yc/200 of BPT and its a classic analog 4+n wires Door phone ...
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2answers
57 views

Calculates the volts from CS5530 24-bit AD converter

I have this circuit (Power supply is 5V): The problem is: How to convert the values to Volts? I get the digital value in 24-bit from spi interface, but I don't know the minimum and maximun voltages ...
0
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2answers
73 views

Analog Design to VLSI Layout Tool/Software

I want to implement an 555 timer. I am looking for tools preferably FREE ones. I looked at certain tools which have GUI where I can select and drop transistors which I find tedious. Is there any ...
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2answers
62 views

Pull force / tension sensor

Does anybody know what kind of sensors are used in these scales? I've found lots of S-shaped tension sensors like this one. I've Googled quite thoroughly for few hours and can not find anything ...
5
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1answer
248 views

Can I use a transistor, or would it be easier to use a microcontroller?

I've got kind of a weird project in mind. I want my project to be able to connect to the headphones jack of an MP3 player. The mp3 player will either be playing a constant tone or not playing ...
0
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2answers
101 views

Decoding ADC pin labels

I'm about to buy a parallel ADC to connect to an EPROM in a analog-digital circuit. I've found some potential ADCs but am having trouble deciding if the ADC and EPROM are compatible. A bistable ...
2
votes
1answer
116 views

Arduino Starter Kit, Color Mixing Lamp Project 4

I just started looking into electronics and circuits. I purchased the Arduino Starter Kit to help get me started. I have a question regarding one of the 15 projects it comes with. Specifically with ...
4
votes
2answers
161 views

Implementing a sine wave inverter with an oscillation circuit

I was thinking today about a whether it would be feasible to implement an inverter using a simple sine wave oscillator (perhaps op amp based or a Wien bridge implementation), a power amplifier stage ...
2
votes
1answer
48 views

How do I add a tuning potentiometer to modify the incoming control voltage of an XR8038?

I have been working on designing an analog synth and have decided to use an XR8038 as my VCO. If I wanted to add a tuning modifier would this configuration I made be okay? P.S. Would I need to ...
3
votes
1answer
165 views

How do “beyond the rails” analog switches work?

I'm familiar with using CMOS switches ("transmission gates") for switching analog signals, but you can't use them for switching voltages beyond their supply rails. (So if you have a single supply ...
0
votes
1answer
68 views

Analog Multiplier with MOSFET - Implementation not working

simulate this circuit – Schematic created using CircuitLab I am using the above circuit to multiply BAT1 and V2, the circuit analysis tells me the output voltage Vm1 should be ...
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2answers
62 views

Shielded vs Twisted cables

For some reason low voltage, high quality audio interconnects seem to be made of 3 wires braided together, when normal low voltage audio wires are two wires surrounded by a grounding sleeve. I'm a ...
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3answers
108 views

What's an analog way to measure only the on-time of a servo PPM pulse?

Hobby radio control receivers typically output a 1-2 or 0.5-2.5 ms pulse every 50 milliseconds, and only the duration of the high pulse matters. Now the best way to decode this signal is probably with ...