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3 days ago | 
forum.allaboutcircuits.com | Aaron Carman
Hello Community,I am facing a problem while building an amplifier for a Photodiode in Photovoltaic mode. I have connected a few photodiodes in series; then I applied a high-pass filter. Now I want to amplify the voltage signal across R3 (in the figure). I went with a non-inverting amplifier design with a comparator.
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6 days ago | 
forum.allaboutcircuits.com | Aaron Carman
Hello!I'm a student at KSU doing my senior project. I really need help creating a circuit to externally power manage a GPU. The idea is that our device takes in the power from the power supply, reads data about the power draw from the GPU and allows the user to adjust the power draw on the fly via a raspberry pi 4. Unfortunately none of my professors are able to help me design the circuit for the power management aspect so I'm reaching out for help.
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1 week ago | 
forum.allaboutcircuits.com | Aaron Carman
This could probably also go in the sections for analog/mixed circuits or power circuits but I'm pretty sure my problem is pretty basic. It's been years since I dove any deeper into electronics than Ohm's law and connecting sensors to arduinos and so on. I'm putting together a bookshelf bluetooth speaker, building a new cabinet and using the guts from a decent pair of desktop Yamaha amplified monitor speakers, and a basic bluetooth module.
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1 week ago | 
forum.allaboutcircuits.com | Aaron Carman
I have an analog signal(in blue), that I am required to decode to 1's and 0's using an ADC. The analog signal is manchester encoded and has a frequency of approximately 18KHz. But as can be seen from the digram the frequency is quite not the same for all the bits and varies a little bit every consective bit but remains relatively constant.
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1 week ago | 
forum.allaboutcircuits.com | Luke James |Aaron Carman
5 minutes is 300 seconds, and I will ignore the 20 microseconds in the denominator as a simplification. With the average current and the selected battery’s capacity, you calculate the expected lifetime. I average =((20E-03 X 20E-06) + (40E-06 X 300)) / 300Essentially 40 microamps. The average current is so low that the battery’s self discharge current could dominate.
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1 week ago | 
forum.allaboutcircuits.com | Aaron Carman
I have installed steering wheel heating in my car. With a single push button, I can turn the heating on and off using a single switch. To this circuit, I want to add startup and shutdown sounds using a DY-SV17F (voice module). Connecting pin 1 to ground plays the startup sound, and pin 2 plays the shutdown sound. To achieve this, I've devised the following logic system:General description: an RS latch, a NOT gate, and an AND gate.
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1 week ago | 
forum.allaboutcircuits.com | Joshua Tidwell |Aaron Carman
Hi,Making a simple tester for automotive. R3/R4 are 100K and cause TestLead to have 6V. If TestLead is touched to a ground wire, an Arduino picks up the voltage drop at ADC and starts the test. Q1A is turned on and power flows from +12V through R1 load resistor and Q1A to vehicle ground through TestLead. Arduino monitors voltage at ADC and generates a pass/fail for the ground circuit under test.
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1 week ago | 
forum.allaboutcircuits.com | Aaron Carman
"I'm trying to build an oscilloscope using an ESP32 and opamp. I specifically want to visualize analog AC signals up to 30 volts. I've encountered a problem here that I can't seem to overcome. It's impossible to proceed without common grounding the AC line's neutral with the ESP32's GND line, but linking the neutral of the AC line to the ESP32's GND is a significant risk. I could use an optocoupler, but the downside of that is it converts negative alternation to positive alternation.
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2 weeks ago | 
allaboutcircuits.com | Aaron Carman
With the goal of improving the efficiency, utility, and performance of audio systems, several companies have recently released new devices to overcome key challenges in the audio electronics industry. While these new products take many forms—from class D amplifiers to solid-state speakers—they provide designers with tools to make audio devices smaller and easier to use. Up first, Novosense recently unveiled a new class D audio amplifier that targets automotive applications.
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3 weeks ago | 
allaboutcircuits.com | Aaron Carman
Teledyne FLIR recently revealed two new kits that provide precision multispectral imaging for advanced research and development. The kits include all of the hardware needed to perform simultaneous thermal and traditional high-speed imaging, with simple software to wrap it all together for synchronous multispectral captures. The Mix family of multispectral imaging devices overlays thermal data on visible images, creating a more robust method of identifying thermal problems in circuits.
