1. L

    Ground / Shield / Chassis / Return Paths

    After watching some videos on grounds / return paths / shielding etc I came up with a design that I was wondering if someone could assist in assessing below simplified diagram with notes to see if it is a good grounding strategy also considering PCB EMI/EMC ?Simplified diagram attached.
  2. S

    How to test if I am grounded properly to work with electronics?

    Hello people of "All About of Circuits"!, I am new to electronics. Been fascinated by it for a while, have studied physics (not Electricity, yet, but its my next unit). I got a multimeter and an Ardist DIY kit for my birthday and I am very excited to start testing, experimenting, and building...
  3. dr3iz

    Connecting grounds

    Hi, I'm designing an ECU for our prototype. This will manage the power supplies to 2 different devices and also some data processing through a microcontroller. The image below is a basic block diagram of the system (sorry it does not look very nice). I am using a 48V power supply, which is...
  4. J

    Noise reduction connecting PCB to USB

    Hi! After producing multiple different PCB designs of a board for controlling a stepper motor, I noticed something that I cannot explain. The boards are in general powered through 12 volts, then a voltage regulator brings the voltage from 12 to 5 V and another one from 5 to 3.3 V. Stepper...
  5. H

    ADC for 8 Buttons

    Hi folks, for a uni project I’m creating a synth using an Arduino. I want to have at a minimum 8 buttons for an input but I’m restricted to using only 1 or 2 input pins. Therefore I wanted to use an ADC to convert the input to binary values. I wanted to use no IC’s if possible so tried using an...
  6. Martino Chiro

    Ground terminal on Power Supply output

    Most DC power supply have a ground terminal, as shown here, but what is its function ? Are there any cases in which this ground connection is mandatory ? Thank you.
  7. V

    AC voltage sensor using Rectifier

    Hello I'm trying to implement a rectifier and AC voltage sensor. The rectifier part works just fine. I'm able to power my device without any issues. Please look at C2 in the screenshot (Circuit schematic). This connector is connected to AC voltages. Vin is a rectifier and the DC part is to...
  8. À

    555 ic reference problem

    I recently purchased a new 555 ic to generate digital clock pulse it work with +5v reference but not work with common ground reference. If you know whats going wrong please let me know.
  9. Lambo Av

    Generator protection, calculating resistance for protection

    A 20kV, 100VA generator is protected by differential protection. 70% of the winding will be protected against the phase. What is the value of resistance to be located at the "Neutral to Ground" protection if the relay operates 30% out of the balance current? Below are my steps to the solution...
  10. U

    Earthing of appliances with conductive cases

    Hi all, this is my second post in relation to the textbook available on this website. It's very good but still finding I need some clarification on some of the points it makes. I've linked to the page below: https://www.allaboutcircuits.com/textbook/direct-current/chpt-3/safe-circuit-design/...
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