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Below is Triangular Modulation Output of a Triangle input wave HI all, I have been trying to understand modulation and demodulation circuitry as part of my hobby :) The modulation circuit above works fine but when I connect the output of the modulator to the demodulator (as shown by blue...

Hi all, can anyone share TA7642 LT Spice model ? This IC is used in transceiver radio to demodulate the AM signal. I have tried to search the web but I could not find any of it. Datasheet is here . Thank you :)

I am wondering if it would be possible to swap out the MOSFETs on the picoUPS-100 by Mini-Box for higher-powered ICs. I know it would void the warranty, but it would be great to get a little more juice out of the device...

Dear all, above shows an AM (Amplitude Modulated Signal), I was just wondering how can I make the AM waveform to have a very low impendence so that it is able to transmit high power. One solution I tried is using an op-amp as buffer which can reduce impendence while keeping the shape of waveform...

Hi all :), I tried to simulate a modulation circuit which uses a comparator, following this click here . The output I get at the 1 kΩ resistor is weird; it should be the same shape as the send signal above. May I know what values of capacitor and inductor are used, and whether the resistor...

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:)

I am using a IR2101 gate driver circuitry to switch the high side IGBT ON (I do not want it to be periodic). Hence I found out that since I am not frequently switching the IGBT, the bootstrap circuitry doesnt not work since the capacitor cannot charge up. I therefore found out 2 ways I can...

Hello all, Been a while since I posted in this forum but I have since managed to create a DC/DC converter that generates about 1.5kV from a 40V input. However, I am having (what I believe to be) significant issues with measuring the output voltage accurately. I will attach some pictures that...

Dear all, I am looking for a circuit that can on an led by pressing the same button for 3 times? Thank you for reading and have a nice day:)

Hi Guys First post here I have a basic project I could do with some help on please The Job - 6 X holo ceramic garden cylinders (plant pots) with the top half having a wider diameter than the bottom half and holes in the bottom surface of the extended section. The owner would like me to...

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...

I have a customer that has a power washer hooked up to a Start-Stop Push Button control circuit. They want to add a timer where once the start button is pushed, will shut off the power washer automatically after a certain period of time (ie; 5 min). What kind of timer do I need to do this and if...

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...

Above is quoted from here. This circuit produces beautiful rain drop led. May I know how do I actually increase the deadtime which means all led are off for a longer period for all the 4 led as shown above? My LT Spice file is below. Thank you :)

The above is quoted from here and I have build the circuit in LT Spice for simulation. The output (highlighted in pink) is as expected that is complementary PWM. However, the question is how do I actually position the wave so that it has same amount of dead time between both waves because it...