All Questions

I have a TF-Mini S Lidar. I have hooked it up to my arduino like so: (Above image from learn.sparkfun.com) And have uploaded this code to the arduino board: ...

What's the name of this electrical connector?

I asked a while back why does a ~$150 120vac electric ceiling fan, above my bed at home, hum and agitate me. what also agitates me is i provide background information and I thought I was pretty clear, ...

This is a Colpitts oscillator in a common-emitter configuration: For oscillation to occur, there must be a positive feedback. But I'm confused how can this oscillator provide a 360° degree turn for ...

I'm frustrated by the fact that I always have to crank to volume to max in order to utilize "aux in" ports on things like my car stereo when sourced from a smart phone or PC. It seems that ...

This circuit uses a current mode controller with an oscillation frequency response of: In the circuit, the designer chose to use a 10nF cap, with a 680 ohm timing resistor, which according to the ...

AFAIK devices containing exposed 5mW lasers are illegal without a license, but those containing 1mW lasers are. But how about a device with ten 1mW lasers? Is it still a safe and legal device? The ...

The components: a laptop, a blue pill board, a +5V power supply(taken from old PC). I have a blue pill board(stm32f103c8t6 mcu). Schematic here. I connect my laptop to the blue pill board via SWD ...

I want to make a driver board for piezo mist maker which requires 10V 1.7MHz signal. So far I have created a signal of 1.7MHz and 0.4 to 0.5V (picture link added) with a crystal oscillator and 2 PNP ...

These power supply wires broke off due to my carelessness. How can I reattach them without soldering?

I am imagining a situation where we have several series-connected thyristors, say 10, each that can block a voltage of 100V. So, the ten series-connected thyristors together can block a total voltage ...

I am developing a 10.7 MHz IF amplifier for a radio receiver. In order to match the input to the output of the driving mixer stage (330 ohm) I need to measure the input impedance. I did the ...

Application note 969 shows that a detector diode has in general higher sensitivity for lower saturation current. The voltage sensitivity at zero bias is derived as: gamma = Vout/Pin = 0.52/Is, which ...

I'm confused, and I hope you can help me figuring out, what I misunderstood. I am not an electronics engineer, so bear with me :) I have a chip, from the engine control unit of a Toyota Yaris Verso ...

I'm looking at the NodeMCU "auto-program" circuit but could not understand why it is there at all. From my point of view, this circuit enables open-collector outputs, but makes programming dependent ...

What prevents lead attached to a piece of semiconductor (for example in BJTs and FETs) from forming a Shottky junction?

I need expert help. I have an old Lenovo C540 AiO desktop that I am trying to salvage. This model is prone to a failure in the SATA power cable, at the HDD connector end. I have found video guides on ...

This question is in the context of a production environment where part numbers and change notices are strictly controlled, and any alternate manufacturer parts under an internal part number must be ...

Is it possible to make a circuit/switch that turns a relay ON whenever there is a certain RF frequency applied and keeps it OFF for all other frequencies. The RF signal should not carry any ...

Anyone know what kind of connector is this?The female connector size is around 18x7 millimeters

I would like to integrate a capacitor onto the power supply of an alarm clock to prevent the flashing "12:00". Which would be the best way to implement?

Alright so a little vague title but here it goes. I'm interested in powering some 5v LED strips with an HDMI cable. I have no idea if this is even possible, I'm lacking knowledge in electronics. My ...

I am trying to use RealTerm to send a .txt file containing a 10X10 array of data to my STM32 NUCLEO board using UART. So far I have been using HAL_UART_Receive_DMA and I have been able to store simple ...

so I have been doing some research on AC servo position flight control surface systems an was trying to find the component used to set the pilot's input command. Found out that a E/I inductive ...

Please forgive my bad language I make Vehicle Speed Indicator with LM2917N-14. I tried it with cheap XR2206 Function Generator and NE555 Variable Square Wave. With NE555 LM2917 working properly, the ...

So after doing some research, I briefly know a 2 phase servo motor's operation. I know it has a control and a main winding that is 90 degrees phase different to generate a rotational torque. It also ...

I am trying to light a LED with a PIC10F206, a PICkit4, the IDE MPLAB X IDE v5.40, and the pic-as Assembler. This is what I tried: ...

So, I want to make a High-Frequency Ferrite transformer that can convert my 150-volt peak Square wave into 100000 Volt Peak. I am using UUR6440 Ferrite Core. Material is CF139 https://www....

i have made simple inverter circuit with z44 MOSFET but circuit work for minutes and the primary coil start heating then shorting finally damage the MOSFETF, it is my 6th time facing this issue. i ...

I have a board with 9x DRV8874, as described in another unrelated thread there. The driver switches fast to 90% of VM when ON (0V when OFF) then converges slowly to the final value (time constant~=...

I have integrated the TP4056 charger design into my PCB. The problem is that when I connect the battery at the battery terminals, I am not able to get the voltage at its output pin. The circuit can be ...

I'm just starting to work with KiCAD. One of the video tutorial shows that 3D view should incorporate components placed on the board: However in my case I can see only the board with pads: Looks ...

Take a look at this circuit The question asks to find Rth and Vth between a-b terminals. Hand calculation yields Rth=3.857 and Vth=4V. With OrCAD, the result is shown below using Bias Point ...

So we have a 5kW generator for our film set. We need to get it as far away from the set as possible. As well as leave the option for 25m consumer extension cord for lights and haze machines. So what ...

I would like to know how do we choose the nodes for a Thevenin Equivalent Circuit. For example, in the voltage divider, we compute the Thevenin equivalent circuit between the nodes where we would ...

I am about to design a flyback converter. As all flybacks with no extra measures it has some ringing. You can see that ringing in this example from -1µs to 4µs: This ringing can be surpressed by a ...

I am new to Proteus. I tried simulating an easy circuit which was a Schmitt trigger using an op-amp. After simulation, the output waveform was an sinewave instead of rectangular wave. Any idea where I ...

Are there any conventions that allow one to tell which electrode is source and which one is drain?

I am controlling an LED strip based on audio input from my phone. I am having some good results, but not exactly what I want, and my ignorance of transistors is holding me back. (I'm a mechanial ...

Can somebody explain to me how 2 phase servo motors move loads? Have researched online but all explanations are very brief, a main winding connected to an AC source, a control winding with variable AC ...

I need to use 12-16 mpu9250 IMU for wearable design. Each IMU will be placed different places on the body. Therefore, I want to read data from each device by using I2C interface. However, problem is ...

I am trying to connect my broken headphone wires. When i connect the signals wires, i twist them together and they work. But when i connect the ground wires, there is no sound unless i connect the ...

In my textbook, the Wien-Bridge oscillator and the Twin-T oscillator needs a tungsten lamp as the self-adjusting resistance: The lead-lag circuit connected to noninverting input has a gain of 1/3 on ...

I have been trying to build a low power toroidal liquid conductivity sensor using the principle given in this image. This link has more information about the principle behind the sensor. What I have ...

I am searching for a linear regulator with tab connected to GND instead of Vout because it would be easier for thermal management. Unfortunately, all linear regulators seem to have their tab connected ...

I'm confused about two different approaches for current calculation through a 5 ohm resistor. The 5 ohm resistor is in parallel with a voltage source so the current through it should be 2 amperes. ...

So I've been doing some reseach on DTL ( Diode Transistor Logic ) and started doing some problems, but the problem i stumbled onto gives me some headache. The actual problem given is Given a DTL ...

What is the standard layout for a 4 layer PCB that everyone follows for a buck converter or similar? I was planning to go like this: Signal Vcc GND Signal Since inductors and FETS are noisiest of ...

Logic buffer is usually depicted like this: But can this work equally well? And if it's not the case, why not?

(As a follow-up to an earlier question answered by the community - thanks!) So I've got the test circuit setup using the HCPL 7520 (datasheet) now and planning to use an Arduino Uno to measure the ...