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213,169 questions
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0 answers
7 views
Current Mirror: Output resistance of stacked MOS used as current source
I am trying to calculate and simulate the output resistance of a stacked NMOS transistor used as current mirror load and I have a few doubts about hand calculation and simulation setup. The circuit ...
0 votes
1 answer
25 views
D1 MINI ESP32 - deep sleep and LEDs
I have the D1 MINI ESP32 board which shall be battery powered in my project. For this I am experimenting with deep sleep to conserve power as much as possible. While the ESP should only take microamps ...
0 votes
0 answers
34 views
Reverse engineering of Mercedes S-Class rear seat fans part 2: how to correctly send data through DC-LIN?
First part of the research here. Some news about the progress of my research: the fan is running! Well, almost. This fan operates on DC-LIN or LIN over Powerline Communication. So I built an ...
-1 votes
1 answer
40 views
Fixing crosstalk with PC Headset (only on Windows)
I'm fixing an old headset (Left and Right speakers + Mic) that had a cut cable. I bought a TRRS female socket, and an auxiliary "TRRS-male to TRRS-male" cable. With a couple of tests I'm ...
0 votes
3 answers
73 views
Operational Amplifier Circuit Question Regarding Current
I have been told that the circuit, attached in the image, has the same current flowing into it as out of it, in regards to the two terminals with the voltage \$u_z\$ across them. It is stated that the ...
-3 votes
0 answers
36 views
Want to learn circuits design [closed]
My fellow electrical and Electronics Engineers, I know there are a lot of young engineers or starters here, who I need a guidance on electronics circuits design. So, what's the way for one to learn ...
-2 votes
0 answers
30 views
Analog Circuit Based Neural Network [closed]
I need to implement an analog circuit based neural network. I haven't found a proper reference to implement it from scratch. Any leads would be appreciated
0 votes
1 answer
38 views
Detecting when a 24v pump turns on
I need to detect when a 24V pump turns on. I've decided to do this using an optocoupler. Could you please tell me if my circuit is correct?
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0 answers
13 views
Subsector/Sector erase look being ignored in QPI mode
I am using N25Q256a NOR flash part from Micron and Uboot code based. Currently, I am facing one weird issue that subsector (4k) and sector (64k) erase look like being ignored by Flash. Bulk erase (...
-1 votes
1 answer
55 views
Diode Oscillator - Any Ideas for Improvements?
My design is found in the link below. I've breadboarded it and it functions. I was wondering if there are any flaws in it. on falstad.com
0 votes
0 answers
21 views
PCM1804 ADC preamplifier design for electric guitar and line level signals running off single rail 9V power supply
I want to design a preamplifier for PCM1804 ADC that could be used with both guitar and line level signals. But the thing is, I want to use a single rail +9 V supply for op-amps. The first stage is ...
-1 votes
2 answers
55 views
Unexpected voltage on input current of level shifter
I'm using buffer SN74AVCA164245 and I feed one of the I/O with 20V and using voltage divider, I expected to see 2.34V on the input of the Buffer and to see 'High(1.8V)' on the output of the buffer, ...
3 votes
3 answers
174 views
How can I calculate the power efficiency of an SMD LED? (% converted to light and % converted to heat)
I am designing an LED matrix for an LED lamp. I need to calculate the heat dissipation from all LEDs which is the dissipation of one LED times their number to choose an appropriate heat sink. The ...
0 votes
3 answers
88 views
Do components packaged in QFP with fewer than 32 leads exist?
Quad Flat Package is a rectangular component package with "gull wing" leads on all 4 sides. The smallest common package is QFP-32 (8 leads on each side). The question is specifically about ...
0 votes
2 answers
33 views
Can we manually drive CSN or CE pins of NRF module while driving the module from some third party library?
This is a Wemos D1 mini ESP8266 module. The SCL and SDA lines are from a RTC module. And all the connections CE, SCLK up to CSN are from NRF24L01 module, and it is mandatory to use SPI communication ...