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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...

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...