transistor

Referring to website link at here , this circuit tries to replicate the waveform of input voltage and make it to a high frequency, I try to simulate the circuit in LT Spice but the output is weird. May I know the solution to this? Below is my attached LT Spice for your convenience. Thank you...

Hi all, I am trying to search for this FLNROSE walkie talkie datasheet in the web but I couldn't find any. May I know if someone is able to find this walkie-talkie datasheet from web because I plan to get the schematic in datasheet on how this walkie-talkie works and try to desolder all...

Hi all:), I have been trying to find circuits to make my own DIY walkie-talkie. Referring to video at here, the Jumper wires(yellow), is it just a wire connection from 1 to 2 ? If so, why need Jumper? Does this circuit works by converting our audible frequency sound to higher frequency sound...

Dear readers, if I want to reset an NE555 timer (by pushing a button within a time frame) at the point where the output signal is at the end of the high voltage as highlighted in the diagram. How can I accomplish this? Thank you for reading and have a nice weekend:)

Hello, people! Thanks for the dropping. I made a Tesla Coil with oscillator circuit on it for project in school and it work well. But I want know how to choose ideal BJT/MOSFET transistor for the transmitter. Is there any reason, formula, or theory that I should know? Because Youtube and other...

I am making an ultrasonic transducer cleaning circuit. Please guide me on how to make it as I am not an expert in electronics but have some skill in it. It has to be a few hundred watts in power, say 500 watts. Here is my idea: As a power source I am using a variac rated at 2000 watts. It is...

Above is related from here but this ic only allows the led to be on at the same time interval. Is there a circuit which can help to activate 3 led consecutively for different time intervals. For example, led 1 will on for 3s (the other 2 led will be off), followed by led 2 will be on for 2s (the...

Hi all, does anyone have the 74HCT.lib with the square symbol of 74HCT.lib :)? Do you mind sharing it because I am having a hard time googling the one with a square symbol as shown above? Thank you and appreciate it :)

Both pictures are quoted from here and here. I am trying to simulate it in LT Spice using Logic gates as the Level Triggered D Type Flip-flop and this circuit converts f to f/2 that is halving the input frequency. However, I got the error timestep is too small in LT Spice. May I know how to...

This LT Spice circuit is recreated from the IR2184 datasheet on how to make a complementary PWM signal with dead time. However, the problem I am facing now is the PWM fed into the 2 mosfets as shown in the diagram above, the dead time between the 2 signals does not increase even if I increase...

Hi all, I purchased a AM FM Radio Receiver DIY kit CF210SP and the tutorial is here. The problem I am facing now is handling the small ic cd 9088, which is too tiny for me to handle haha. So, I am searching for a bigger version of cd9088 that can be mounted on a breadboard for convenience, but...

Hi people, It has been quite a long time since I posted anything lately :) Refering to the XOR gate schematic and truth table above from here, I have designed them in LT Spice. Higlighted in green are the 2 inputs and purple is output.However, to my surprise, when A and B are both true (A=5V ...

I have a boost converter circuit. its designed with IGBT . But I wanna use GaN transistor and simulate it . But GaN Transistor has two gates . Do I have to use two gates or using one gate is enough ? How can it be its design with vpulse values and resistor? I added photo of circuit, GaN...

Hi , I will calculate GaN transistors switching losses in Dc DC converter Systems. The formula is , Psw= Vds*Id*fsw*((Ton+Toff)/2) . Vds and Id are drain-source voltage and drain current of the device at OFF and ON intervals respectively. fsw switching frequency and Ton is switching time...

Hi all, :) I found a relay datasheet at here. Just Wondering, can this relay handle 2 seperate circuit or just 1 circuit as highlighted in my diagram below?. Thank you :)

Hi all :), The circuit on the left is a delay off circuit using NE 555 whereas The circuit on the right is delay on circuit. For hobby purpose, lets consider this scenerio. When light is off, the led will turn off after a 3 seconds delay whereas when the light is turn back on, the led will turn...

Hi all, :) I am trying to simulate a circuit at https://elonics.org/adjustable-auto-on-off-delay-timer-circuit-using-555/ for delay timer in NE 555. I have replaced the switch with a mosfet, however I don't get the correct output :). I have attached my LT Spice file below. I am not sure what I...

Hi there! I am currently looking for 2SA1708 and 2SC4488 transistor models to integrate into Spice, but I could not find any model on the web. Could you please help me if you have the related models? Or can you please give me feedback about what parameters are the most important ones to model...

Hi all :), This is about Hall Effect from here. The voltage across a metal will change based on the strength of the magnetic field. I am wondering whether this will be accurate in reading small magnetic field such as the earth's magnetic field to point to the NORTH. From my knowledge, since the...

Hi all, below is a TL 431a voltage regulator circuit. Just out of curiosity, what can I do to replace TL 431a with its internal discrete components circuit so that I can better understand how a voltage regulator works :) I have posted my LT Spice file below so that you can unzip and simulate it :)