1. S

    8051 Microcontroller Hardware Issue

    I design a project using an 8051 microcontroller. A project description is mentioned below: I used two LEDs with the logic that if led1 is on continuously then led2 will be on for 1 sec and off for a long delay. This logic is running fine in proteus software but it is not working when the...
  2. M

    Program for Active Analog Filter Selection and Computation

    Hi, I have many active analog filters to design, mainly bandpass an lowpass. I am tired to write pages and pages of computations, try to find the best architecture, select between Butterworth Tchebytcheff, Cauer etc.. Would you know any intelligent program which would help me to choose the best...
  3. voidSurfr

    Design: Simplicity vs. Complexity

    Hey all, this is an oddity of a request. First, I'm not an electrical engineer; next, I wouldn't know a good circuit if it gave me a lap dance, so...I'm asking the community for help. I'm writing a blog and would like to include some circuit diagrams; it seems like they would be perfect for...
  4. C

    How to introduce myself to the microprocessor world (MOVE FORM MCU's to MPU's)

    Hi everyone!, im currently a student, i know about electrical circuits, basic electronics, digital circuits, basic digital design, microcontrollers, programming and other things, im a biomedical engineer and currently im working as service engineer (giving maintenance to medical equipment) but...
  5. BuyingOffDeath

    Unexplainable RF Power levels

    I have an RF Explorer to use to scan what RF's are around me. I am curious as I'm am just getting in learning about wireless transmission and propagation. However I can't explain these power levels of -10 dbm all the way to -0. The RF Explorer does seem to be working correctly just based off of...
  6. D

    Help with a design

    Hi guys, I am new here. FYI before I get started, I am not an engineer, designer, programmer, or anything of that nature. I’m just a dude who loves a challenge, and I love diy home projects. Now, I hope this is the right forum to ask this kind of question! So let me get started: I have lately...
  7. S

    Adding higher-powered MOSFETs to picoUPS-100 by Mini-Box - recommendations?

    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...
  8. sleigh.za

    My first ESP32 Dev board design

    Hi everyone, I am relatively new to designing schematics and PCB's and have only ever done simple circuits up until now. I have tried my hand at designing my very first ESP32 based Dev board. I know that these can be bought for fairly cheap already, but wanted to have a go at actually designing...
  9. J

    folded cascode op ampdesign

    Hello, I'm trying to design a folded cascode op amp as shown below. I need a high full power bandwidth, about 90 to 100MHz, and a high gain (>60dB). I reach the required gain but it's hard for me to have a large full power BDW, it doesn't exceed the 500KHz. From the theory, the frequency at...
  10. J

    operational amplifier design

    Hello, I'm trying to design an one stage OP AMP made of a differential pair, a current load and a current mirror as shown in the picture ( the first stage only, I didn't include Q7 Q6 and Compensation capacitance) I designed the circuit to have a gain of 100V/V, a slew rate of 2V/µs, aGWB...
  11. Lavin.devil83

    Changing pwm Amper

    Hello I really need your help I need a circuit to change amp of Pwm Input : pwm 12V 5Amp Output: pwm 12V amp between 15-50 amp I have to say I don't know programming or program any type of IC I know I have to pay money for design a circuit like thus, but I live in Iran we can't and don't let...
  12. D

    PCB, Tips and pointers if you've got a minute

    Hello everyone, I have taken a circuit from breadboard to PCB and I am having some issues with a few components. The device is a power controller designed to monitor 2 batteries. 1 battery is a backup battery and the other is the main battery. The main battery is also a starting battery for an...
  13. marcor2196

    PCB for a home project with Arduino

    Hi all, i've realize a home project based on Arduino (in order to integrate my domestic heater on my Home Assistant system) with a NodeMcu V3 board where i wrote my custom program that use a DHT22 sensor and a TFT ILI9341 touchscreen display to control the behavior of a relay that switch on/off...
  14. JDuffy93

    Automatic adjustment of resistance

    Hi I have a design requirement and are having an issue of designing a method to achieve it I have resistive elements that change with temperature and generally start with slightly different resistances in any case, what i need to achieve is a way to balance the resistances or a method to...
  15. D

    LED Controller PCB Design Feedback/Suggestions Request

    Hi there, Main Question I'm hoping to get some feedback on this PCB design and the overall design, because this my first real electronics project. Also, I have several questions about feedback I received on ESE. Background I'm aiming to make an instrument for my brother, and since I've been...
  16. Genosphere

    Guidance for Electrical Power Project - 4160V motor needs starting (simulating utility company?)

    Hello all, this is my first post here so be gentle. Currently enrolled in an Electrical Engineering program and finally finishing up next year. I have 7 years of avionic and airframe experience in the aerospace industry and more hours around automotive junk. I have worked plenty with coding, CAD...
  17. Sajid_Naseeb

    How do I simulate these two different Line Impedance Stabilization Network (LISN) models in LTspice?

    So, I found these models for Line Impedance Stabilization Network (LISN) in two different books. I want to simulate these two models in LTspice, but I don't know which side to connect the EUT and which side to connect the spectrum analyzer and ofcourse, where to connect the source? and how do I...
  18. P

    Finding the Size of Inductor and Capacitor

    Hi, i have calculated the L and C value for filter circuit for Three phase inverter, now i would like to know the size and weight of the filter circuit for the L and C value i have calculated. Can anyone help me on how to do this ? Thank you. Raj
  19. S

    8th order sallen-key butterworth lowpass filter

    Hi guys, I'm running into some problems designing a 10MHz 8th order sallen-key butterworth lowpass filter. My requirements are: cornerfrequency f_c = 10 MHz max passband gain of 0.5dB filterorder of 8 available components: resistors, capacitors, op-amps What I have tried so far: I found...
Top