voltage

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 :)

Hi all, I saw this chip at here which is able to make beautiful rain drop lights and searched for the datasheet here for its internal circuits. I have searched the web that can do the beautiful rain drop lights using discrete components but could not find any. Does anyone know how to do the rain...

Dear readers, I followed this code at here and built its circuit. However, the stepper motor does not get enough power or even torque or speed so that when I can stop the wheels easily by slightly touching them? Are there any solutions for this? I have checked that my battery are all...

Hi readers:), I found datasheet for HALF-BRIDGE DRIVER IC here . I was hoping to find the IC discrete components circuit from which it was built upon using transistors, diodes, resistor only but its not in the datasheet. I tried to search the web for it but it offers H-bridge with negative and...

Hi all, I saw this article at here . I tried to simulate it in LT Spice, however, not an expected output. What mistake have I made? . I have attached my LT Spice below for amendment. Thank you for reading and have a nice day :)

Hi all, I want to implement a H-bridge driver circuit. May I know how to make some changes to the circuit above so that it forms a full-H-bridge using transistors. I attached my LT Spice file below :) Thank you for reading.

Hi all, I am trying to simulate the circuit above in LT Spice but the output is not the same . It can be found here . What mistake have I made :) ? I have attached my LT Spice zip in the folder below for easy amendment. Thank you

Hi all, above picture is a ne 555 flip flop circuit (1 off, 1 on) and vice versa. Lets say the red led receives an input (1) that is a constant dc voltage, how do I make the red led to go from dim to bright and then from bright to dim and vice versa with the blue led? Are there any schematic...

Could really use some help with this, thank you all :)

Hi all, I refer to this website at here . This circuit should give a complementary square waveform (R1 square wave & R2 inverted square wave). However, I did get a good square wave across R2 but R1 did not get any square wave. Does anyone know how to fix this? I have attached my LT spice below...

Hi all, can anyone share IR2184 gate driver LT spice file with me that can be downloaded ? Thank you:)

Hi all, I bought this IR 2184 which is used in half-bridge inverter. Will the peak voltage of PWM of GS of mosfet as shown in green will be according to Vcc which means in this case, if I use a Vcc (12V) and PWM of 8V peak (IN), it will output a 12V peak square wave at GS of both mosfet? And...

Hi, I need help determining which switches to use to replace the ones that are intermittent on the controls for my electric blanket. I believe it's this one, based on how it looks, but I don't know whether or how to determine if it's 24v or 12v. The switches don't always work when pressed...

Hi readers, When I used this IRF 3205 which has high capacitance between the Gate-Source of the mosfet, whenever I add a lower pull-down resistor, the switching becomes faster and faster (visible nice square wave). For my case, for IRF 3205 to fast switching at 20kHz (nice square wave), it would...

Hi, is there anyone having this PS 2501 optocoupler library from LT Spice. Pardon Me, I couldn't find on the internet :). Please attach it below. Thank you

Dear readers, Above is taken from here . Can anyone recommend transistor Q1 (npn) and Q2 (pnp) to me for driving a mosfet at a 100kHz or higher. What are some of the common best fast switching Q1 and Q2 that can handle high current and high frequency PWM at its base ? Thank you :)

Dear Readers, I got this PS2501 optocoupler datasheet at here. In the image shown, the rise time and fall time is microseconds and I am afraid it's not suited for my needs as it will produce some switching losses in H-bridge circuit running at 100kHz minimum. Are there any very-high speed...

Hi all, My requirement is to connect an additional light in parallel to my car's interior cabin light. My car supports upto 10w and I already have a 2W LED bulb inside, and the additional light is about 25W, so connecting it directly is not an option. So I connected a 12v relay with the signal...

Hello everyone, I got an old motorcycle (Sachs 125cc) and I need to fix my front headlights, because their lighting isn't powerful enough. I am not using a battery for them and they only work with the dynamo. As a result when I hit the gas the headlights shine enough and I want to keep that...

Hi readers, :) I found this at Click here This is an example of a disconnect and reconnect circuit using NE555. This means that the state of load will be (High, then, Low, them High). However, when I simulated using LT Spice it just give me (Low and High only). Does anyone know how to make the...