Questions tagged [circuit-design]
The process of creating a circuit to accomplish a particular task. When designing a circuit, one should consider how it should work, the target specifications, efficiency, cost effectiveness, code compliance, and ethics.
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Connecting two batteries in parallel
I am building a POC with two COM-15208 buck-boost boards (5V/3.3V from 3.7V LiPo). Daily draw: ~1825 mAh (~76 mA avg).
I have two 10000 mAh batteries available with me and I want to parallel two ...
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Making integrated circuit equivalent circuits
I'm thinking of building something (a replica of a Pioneer PR-7820 LaserDisc player--I'm going to at least try). However, I've run into a problem: many of the integrated circuits, having been created ...
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High-Frequency Sine Wave Amplifier Design - 600mVpp to 360Vpp (100 kHz - 1.1 MHz)
I'm designing a circuit to amplify a sine wave signal from 600mVpp to 360Vpp.
Frequency Range: 100 kHz to 1.1 MHz.
Total Voltage Gain: 360Vp-p / 0.6Vp-p = 600V/V.
Load: Primarily a 2pF capacitor.
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Understanding the topology of an analog multiplier & divider
I came across this multiplier/divider op-amp circuit from https://usermanual.wiki/Document/snla140b.1643036625/view.
How does it work? I am trying to modify it to a squarer without supplying 1V at E2. ...
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Transistors gain bias
My project requirement is that for a 10mV peak at a 30KHz signal, I need 2V peak(1% accuracy), DC offset < 20mV output with 10 ohm load. The component type we can use is limited(op07, 2SCR293P and ...
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DC offset on power amplifiers output
I have a couple of questions about the DC offset on the output of the power amplifier. Lately, I've been trying a couple of designs in LtSpice and I noticed that DC offset is much too high(or so I ...
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How to learn how different components interact with each other?
I understand capacitors, diodes, resistors, transistors on a simple level, but for the life of me I can't figure out how or why they or what they do in a circuit.
I understand that capacitors hold ...
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Proper Grounding in a Multi-Voltage Circuit
I need a little help understanding how I could implement star grounding (or any other type of good grounding technique) in my circuit. I want to create a project where there would be a Raspberry Pi, ...
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How will current flow in this 120 Vdc circuit when various switches are closed? (homework)
Answer to 2 is D and to 4 is B. I'm having trouble understanding the logic behind these answers.
For Q2: How will closing switch #4 prevent lamp from lighting up? Wont current just flow through both ...
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Connecting RC circuit to Enable pin of a MUX for enabling after power on
I am connecting TMUX1108 to electrochemical input of AD5941.AD5941 has only three GPIO pins.These GPIO lines will be connected to address lines of the MUX.No pin is available with AD5941 to control ...
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Difficulty implementing differential output stage
I’ve developed an elliptical circuit followed by 3 op-amp stages. The final output needs to go into an LPC4370 ADC (can’t be changed), which requires a differential input (100 mV to 900 mV range). I ...
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A6217 with 700 mA LED schematic check
I’m working on a circuit board for an amber strobe unit. It will feature eight individually addressable LEDs controlled by an ATtiny microcontroller. Each 700 mA LED will be driven by an A6217 driver ...
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First electronics project with actual PCB design. Can you help weed out any problems?
I would like to ask for your help directly—like spotting obvious, glaring problems that a newbie like me might make.
So, my idea is a door/locker controller based on two R503 fingerprint sensors with ...
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How to calculate R in high input configuration of voltage regulator?
I looked all over the internet but I couldn't find any info. So, my guess for the first configuration is the following:
Since R is connected between the base and emitter, the voltage across it is ...
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Reading multiple 12V switch inputs through PC817 and 74HC165 using STM32
I am designing a schematic for a board where I need to read multiple 12V inputs connected through a Phoenix connector. The power supply will originate from 12V so I have used LM7805 to first convert ...
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