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Will this circuit design of a simple slayer exciter circuit work?

I have been looking at different designs for a simple slayer exciter circuit and have attempted to create a circuit diagram for it based on what I have seen from some other designs online. I just ...
Raheel Anwar's user avatar
0 votes
2 answers
18 views

How to control two pumps with one switch?

I am not an engineer, and I need help. I have two pumps (A and B) that I want to control them simultaneously (A and B) or individually (A or B). I want to use a single switch with three options: ...
gunes's user avatar
  • 1
0 votes
0 answers
13 views

ov2640 pclk frequency

For a project I'm working with ov2640 camera, I want to use it in normal mode to capture an image. the size is 128x128 and I want to get it in rgb565 format not compressed. I used the registers set ...
Camera user's user avatar
0 votes
2 answers
20 views

Skin effect of wires with increasing frequency

When wiring RF inductors, how does skin effect affect the signal when larger wire (i.e. 24 AWG compared to 38 AWG) is used? For context, I am building an AM radio(frequencies from 72 kHz to 1.3 MHz) ...
lemon's user avatar
  • 590
0 votes
0 answers
24 views

Reverse Engineer an Intellisense alarm

I'm wondering if someone can point me in the right direction. I'm trying to reverse engineer an intellisense alarm. When I look at the keypad it has four wires. 12-13.7 V 0 V Clock Data The keypad ...
Jonathan Perrozzi's user avatar
0 votes
3 answers
70 views

How to add 40 ms delay after 3.3 VDC rail is ON?

What's the simplest method to add a precision 40 ms delay to a 3.3 V rail?
Ariel Narboada's user avatar
-1 votes
1 answer
54 views

Converting 12 VDC to 24 VDC @ 6000 Watts [closed]

I am wanting to try to build a 12 VDC to 24 VDC converter rated for 6000 Watts or 250 Amps. Anybody here have experience designing such a board? I have been working with Chat GPT and its not ...
Henry Dumonte's user avatar
0 votes
0 answers
34 views

Is this circuit safe to put in my ceiling? What improvements could I make?

I uploaded a picture, is there a better way for me to share the circuit? The addressable LEDs use up to 100mA at 5v, that is why I am using 3 5v power supplies in parallel, each offering 600mA. The ...
Cancun Manny's user avatar
0 votes
1 answer
38 views

Coupling/decoupling power supplies: how?

I'm adding a hi-Z adapter to a solid-state amplifier that is powered from the mains through a transformer and regulator. The hi-Z adapter is powered by 24 volts DC, so i need an external power supply ...
delt's user avatar
  • 101
0 votes
0 answers
13 views

Get Package Delays from IBIS R_pin, L_pin, C_pin and length

How can I calculate package delays (ps) from the resistance, capacitance, inductance and internal length (µm) of each pin? When I asked the component manufacturer for the package delays, they just ...
Dan's user avatar
  • 133
0 votes
2 answers
40 views

Strange Behavior with Soft Latching Power Circuit: LED Inconsistently Staying On

I'm here because I'm experiencing a very strange behavior with a Soft Latching power circuit found on YouTube. Yesterday, after finishing my circuit and code, it was working weirdly: the LED would ...
Naografix's user avatar
  • 101
0 votes
2 answers
45 views

Can I put schottky diodes in I2C line to prevent LTC2944 from powering my circuit through SDA and SCL?

I am using a LTC2944 connected to a battery that fluctuates between 11V and 14.4V. SDA and SCL lines go to a microcontroller and other peripherals (also connected to 3V3 via 10k resistors). I can read ...
Tomás Arturo Herrera Castro's user avatar
-2 votes
0 answers
21 views

problem with the main board I am experiencing a problem with the main board [closed]

I am experiencing a problem with the main board Could you please help me with this, or recommend someone who has expertise in main board repairs?
Abdalrhman Aburumman's user avatar
0 votes
2 answers
24 views

How to correctly indicate reponse time of a power supply

I want to draw something to indicate the response time of a power supply to a change on the load side. Here is what I came up with and I want to ask if it is the correct interpretation: Does the ...
DEKKER's user avatar
  • 775
0 votes
2 answers
24 views

Switching ON/OFF an ADC line

which electronic component could one use to switch ON/OFF several external lines for ADC? Context: I am working on a small project where I would like to measure 4 external voltages (0-3V range, let's ...
Bob Becher's user avatar
0 votes
0 answers
49 views

How to dim Chinese ceiling led lights [closed]

I have purchased some very powerful work lamps (80w) that provide excellent light for working on very small parts. However for most of the time I don't need that much light and I am trying to figure ...
Broom Stick's user avatar
0 votes
0 answers
19 views

Dual edge triggered Bistable Multivibrator

Design a bistable multivibrator to increase the frequency at which the data is stored. When doing so, ensure that the data is stored at the rising and falling edge of the clock. However, due to lack ...
aditya arya's user avatar
3 votes
3 answers
222 views

Why is the MOSFET in this fan control circuit overheating?

I’ve designed a fan control circuit using an N-channel MOSFET (STN3NF06L.) The fan operates at 12V, and I’ve isolated the 12V side from the 3.3V microcontroller side using an optocoupler (ACPL-W314-...
Mayur Nath's user avatar
-1 votes
1 answer
34 views

3-Phase system Voltage conversion

If we are converting from Y to delta configuration or vice-versa, how do we convert the phases of our voltages? I've seen that we need to add or subtract 30 degrees from one another, but I don't ...
Electricity's user avatar
1 vote
1 answer
39 views

IR Blaster Resistor Calculation for IR LED (breaking ohm's law?)

We are trying to build IR Blaster based on schematics provided by Tuya. I believe Tuya based IR blasters sells hundred of thousands per month if not millions. So I am quite sure that there schematics ...
Gailu's user avatar
  • 43
2 votes
3 answers
238 views

What is the function of this resistor and capacitor at the input of optoisolator?

This "equivalent input circuit" shows a resistor and capacitor at the input of optoisolator (inside the red oval): Are they used just for modelling, or there are actual physical components ...
Paul Jurczak's user avatar
2 votes
1 answer
65 views

Trying to identify this chip and possibly its functionality?

Long story short is I applied too much voltage to my Smooth Stepper and I'm just trying to learn a little about it and possibly get lucky and fix it. I'm trying to identify the IC in the pic as I ...
user781675's user avatar
0 votes
0 answers
11 views

Can I use a large ESC controller with a mini BLDC motor? [closed]

I bought a HappyModel SE0802 19000KV Brushless motor for a project. I have a 30A 2S-4S BLHeli ESC controller. Is it possible to run the motor with this ESC controller?
Pratyush Manas's user avatar
1 vote
1 answer
36 views

ESD protection device selection

I want to select a ESD protection IC for my circuit with the following conditions: Battery based and ultra-low-power Battery voltage 3.6 V My sensitive chips inside my circuit has Absolute Maximum ...
Andromeda's user avatar
  • 491
-1 votes
2 answers
32 views

What are the VDDSD, VLXSD, and VFBSD pins?

On the STM32WB09KEV, and on MCUs in general, what do the VDDSD, VLXSD, and VFBSD pins mean. I can see that they have something to do with SMPS (input/output, ground and output), but what do they ...
YANNTASTIC5915's user avatar
0 votes
1 answer
49 views

Replacing the BJT in the current limiting circuit with a MOSFET

I was looking for a current limiting circuit and found an implementation using TL431 and a bipolar transistor. However, I did not have a bipolar transistor at hand for the required current and ...
Typeof undefined's user avatar
0 votes
2 answers
42 views

Verifying if HSE is used by MCU as system clock without probing

I have a PCB where I use an 8 MHz quartz resonator as this MCU's external system clock source. In STM32CubeIDE the setting is as follows: The program runs fine in MCU, but I cannot be sure if HSE is ...
cm64's user avatar
  • 2,217
0 votes
0 answers
13 views

plecs simulation of output impedance of switched capacitor(SC) converters

I am trying to simulate how output impedance of several DC/DC switched capacitor converters(dickson, ladder, and series-parallel) changes as switching frequency increases. I referred to several papers;...
user372587's user avatar
1 vote
2 answers
53 views

How to simulate for the Gain of opamp Bridge Differential Amplifier?

Hi experts, I have this circuit, with a bridge connected to an op-amp in differential form, and I want to simulate it for the Gain of the circuit in PSPICE. I have found it's gain by hand, which comes ...
Vibhav shivadeker's user avatar
0 votes
1 answer
34 views

Ebers Moll parameters for MPSA18 and AC128 BJT transistors

First of all, I should mention electronics is not my field so my problem might be trivial for you. I'm currently working on my thesis and I need to model two BJT transistors: NPN MPSA18 and PNP AC128. ...
Sebastian's user avatar
0 votes
0 answers
30 views

I2C Write Function and Making the Array User Inputtable with Python

I'm wrapping up the firmware for my project using 4 TCA9548As to switch between 32 different ports for I2C slave devices. I have a raspberry pi and clamp on master SDA and SCL lines for master input. ...
Beau Raley's user avatar
0 votes
0 answers
16 views

How to connect several sheet symbols with [x...y] stye ports to a bus?

I have two ADC units within my hierarchical design. Each ADC unit have 16 inputs which I made with ADC[0..15] sheet port. Is it even possible to use both units? Now ...
Roman Matveev's user avatar
2 votes
2 answers
49 views

Replacing USB-C socket on a keyboard

I decided to fix some of my stuff that has broken USB-C ports. (why are they so fragile!) I've removed the old sockets and cleaned the pads, but when the old sockets were damaged (by simply inserting ...
Haverford West's user avatar
-3 votes
0 answers
22 views

Troubleshooting of Emerson Jacking Soft Starter [closed]

The Soft starter is tripping and showing motor connection immediately it is put to run. I have checked the motor connection and the power connections on the control system but the error is still ...
ECR Inagha's user avatar
0 votes
3 answers
54 views

Filter on SEPIC architecture output for making +/- 60 V from 11 V input

I'm working on a LM5155 Boost/Flyback/SEPIC controller reference design PMP40488 from TI. The goal of the design is making variable output (maximum +/- 60 V) from 11 V input. My question is related to ...
Andromeda's user avatar
  • 491
0 votes
0 answers
27 views

Uninterruptible power supply for wireless equipment using cheap modules and cheap batteries

I've built an uninterruptible power supply (UPS) to use in my house during power outages that last for 16-18 hours per day. The idea was to use previously bought cheap modules from Aliexpress and old ...
Zero Cool's user avatar
1 vote
0 answers
19 views

Cannot decode IR signals using IRRemote Library

I'm using RC5 encoding for my project. I'm sending signals using RC5 Protocol. The transmitter is sending the signals correctly. But on the receiver node, when I decode the signals, Library is unable ...
Tauseef_Ahmed's user avatar
1 vote
0 answers
36 views

Debugger/Programmer Invalid Target Device

I use a PicKit5 to program a PIC24EP128MC202 using MPLAB x IDE v6.20 with XC16 Compiler, I recently fixed some memory model issues and I ran into this problem where "Invalid Target Device" ...
I have no enemies's user avatar
0 votes
0 answers
36 views

Nanogrid management PCB review

I have made some progress on the PCB for a nanogrid consisting of solar panel, wind turbine, batteries, load (not yet connected) this board monitors the current/voltage of each components and sends ...
Knowledge Seeker's user avatar
1 vote
1 answer
46 views

STM32 MCU doesn't reset after flash

I'm using STM32CubeProgrammer to flash an MCU. But after flash completes, to reset and run the MCU I have to interact with NRST pin by a push button. Is there a way that right after the flash the MCU ...
cm64's user avatar
  • 2,217
0 votes
2 answers
78 views

What is the role for each of these AC coupling components?

I'd like to learn more about the RP2040 PWM Audio AC coupling circuit found in figure 22 in this document. Figure 22. Schematic section showing the Analogue PWM audio circuit Even though I understand ...
Erik's user avatar
  • 101
1 vote
0 answers
49 views

Why does this push-pull converter fail?

Consider the following circuit of a push-pull converter. I would be interested to learn why you think it fails (MOSFET and controller). The controller is a UCC28084. The MOSFETs are SSM3K361R (i.e. ...
tobalt's user avatar
  • 22.5k
1 vote
1 answer
26 views

PIC24 memory model problem error

I attempted to run a code to start understanding how PIC24 works but I run into a memory model problem. I don't understand what's his optimization issue since I have enough space to write it on, and ...
I have no enemies's user avatar
0 votes
1 answer
69 views

Constant output voltage in buck-boost converters

I'm a self-taught student. I'm trying to understand the working principle of buck-boost converters in continous conduction mode. When the switch is turned on, the equation describing the inductor is ...
Luke__'s user avatar
  • 309
0 votes
1 answer
34 views

Part number of this IC marking "44t" - Identification

Please help me define the IC marking "44t" in the picture below.
Bang Duong's user avatar
1 vote
1 answer
39 views

Is there a simple approximation for B-field strength of a loop antenna when driven at 10 GHz?

I have a near-field loop antenna that I'm applying a microwave field to at 10 GHz. I'd like to have it interact with a small magnet that is much smaller than the loop. Here's a picture with the little ...
Steven Sagona's user avatar
0 votes
1 answer
32 views

Audio Codec Input/Output Channel Stages

I am planning to build a PCB for a Eurorack Modular Synthesizer, incorporating an STM32 for DSP and a bidirectional Audio Codec like the TLV320AIC3104 to handle the ADC/DAC. Eurorack audio signals ...
95lux's user avatar
  • 1
4 votes
1 answer
419 views

How to connect to "upstands" on the PCB without soldering?

I've got two items of the same model number, but one of them has a Phoenix type terminal on the PCB for the connection. See photo below. The other one has "upstands" poking out of the PCB. ...
user27511's user avatar
  • 601
2 votes
2 answers
55 views

4N25 Optocoupler design

Below is a simple 4N25 optocoupler circuit that I designed in LTspice. 10 mA is flowing through the input. It works in saturation. According to the datasheet in Figure 2 (CTR-sat), it says 0.7, so the ...
Mhan's user avatar
  • 377
0 votes
2 answers
51 views

Active Bandpass with "Tunable" F Using Potentiometer

I'm trying to construct a simple bandpass filter circuit using the multiple feedback topology with one op-amp (I'd like to leave out a dual-opamp approach for now). I'd like the center frequency to be ...
Nils L's user avatar
  • 103

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