circuit design

  1. Topad

    Zener Diode voltage regulation

    Hi All, I have two designs using a zener diode for volatge regulation at 24V supply volatge. I like to know which is a better design to go with. Please see attach image. The load device is an active buzzer, that uses 15ma at 4v. Design #1: I have a shunt zener regulator using a resitor that...
  2. S

    SI5389 Clock Synthesizer reference schematics

    Hi all, I'm trying to implement a IEEE1588 Network Synchronizer using SI5389 Clock Synthesizer from Silicon/Skyworks. However, I'm not able to find a reference design for the above and need schematic designs. Would be of great help if you share a design if any to get an understanding of how I...
  3. A

    Driving RFP30N06LE N-Channel MOSFET with TC4420 MOSFET Driver

    Hi all, I'm trying to drive a RFP30N06LE N-Channel MOSFET with TC4420 MOSFET Driver. The MOSFET is used to switch a [1W LED][1]. The input to the MOSFET driver is provided by the 5V from an Arduino Nano. But my circuit is not working: it seems that the VDD somehow leaks to the input of the...
  4. ShinyFace

    Mini automated solar powered lamp

    Hi everyone, I'm trying to build a solar powered lamp that automatically turns on when it gets dark for my grandfather. He has already purchased a small solar panel connected with micro USB to a light bulb that has to be switched on, but I wanted to automate this by connecting a photo resistive...
  5. K

    Asynchronous counter that counts from 0 to 13

    Hello everyone. I'm having troubles with my homework. This is the description: The aim of the assignment is to design an asynchronous counter that counts from 0 to 13. Design assumptions: The counters should be asynchronous and implemented with flip-flops and logic circuit gates. • The...
  6. spacejedigundam

    how to Vernier TDC adjust every stage time differential to achieve 1 TLSB ?

    How do we get td1 - td2 = 2ns? I have no IDEA about how to adjust delay cell ,Thanks solving my problem , Thanks a lots
  7. B

    Help with LM3914 Tachometer w/ shift light

    Hello, I'm currently working on an LED bar tachometer using an LM3914, with the alarm flasher functionality being used as a shift light. I followed a circuit diagram from this post (https://forum.allaboutcircuits.com/threads/led-tachometer-lm3914.37656/) about setting the input to be 0-5v...
  8. pidgin

    Circuit review/analysis for a stepper motor auto-enabling and time-delay mechanism.

    Hi people :) I would love some help reviewing my little circuit.. I have a stepper motor driver (TB6600) which has an "ENABLE" function. It has an ENA- that is supposed to be connected to the ground, and a ENA+ where you supply the signal for ENABLING or DISABLING the stepper motor connected...
  9. C

    Active filtering circuit design

    Hello everyone, I need to design a circuit on breadboard that give filtered outputs as "0.5-4 Hz; 4-7 Hz; 7-12 Hz; 12-30 Hz; 30-100 Hz; 100-1000 Hz" using active filter principles with introducing input signal. Can anyone help me? Thanks in advance.
  10. E

    Trying to design an audio circuit with a carbon single button microphone so that I can output the audio into a PC

    So I recently purchased a 285W western electric transmitter as I'm trying to more or less make a microphone that can plug into a computer which uses a carbon button microphone from the early 20th century. I have little education in circuit design, though I know enough to know I probably made...
  11. D

    Up/Down Counter with 2 input sensors to trigger clock

    Hello, can you help me with this project? I want to design a circuit which counts up when the ENTRANCE SENSOR detects an object and counts down when the EXIT SENSOR detects an object. I created the circuit design attached below with the help of some tutorials on YouTube but I do not know what...
  12. I

    T.I. BLE USB MCU Programming Trouble (CC2540)

    Hello Everybody! I am trying to program/communicate with the CC2450 BLE IC, which is a transceiver/microcontroller. My computer is having trouble recognizing the device. It does not show up in Device Manager. I've tried the T.I. tools for trying to communicate with it. I've downloaded the BLE...
  13. D

    can someone help me with this diagram?

  14. W

    MOSFET allows current through even when turned off

    Hi, I'm relatively new to circuit design and I'm trying to create a circuit to turn on/off a 6V DC motor using a microcontroller. To do this, I am using an N-channel MOSFET. The MOSFET appears to be working, because the drain to source resistance when the gate = 0V is ~10 MΩ, and when the gate...
  15. R

    If you can Help! ?o design an Automated system

    I need to design an Automated system such that a user gives inputs in 3 bits and there's a clock running that resets itself and gives a positive signal after the time indicated by input. We can use logic gates, combinatorial circuits, sequential circuits, counters, registers.
  16. katerineblankca

    Confirming Circuit Configuration.

    Hello, I am in a research team and is designing a circuit system for powering a motor with battery and supercapacitor. The battery and supercapacitor powers the motor separately and the motor gives regeneration power back to the supercapacitor (motor driver allows for regen). Can experts in this...
  17. Nikolas_

    Battery charger circuit design

    Hey, so I am trying to design and build my own battery charger for 4 cell LiPos (including HV-LiPos with 4.35v/cell) but I don't have a lot of experience with circuit design. I designed this circuit so that it can either supply a constant voltage or constant current to the battery with the...
  18. A

    Product Circuit Design

    Hi, I am currently completing a project and require assistance with the electrical circuit design. Not sure if this is where to ask but currently unsure where else i can ask and I am clueless. I have supplied information below but I may have made mistakes. The components required are: Power...
  19. M

    3.3v PWM to 10V to drive Power MOSFETS with Low Rds on?

    Hello, I am designing and developing a low voltage Battery management system . i have designed whole circuit but in one small thing i am stuck. kindly help me answering it. Battery Pack specifications: 36 V 2.5 AH 10s battery pack. maximum voltage : 42 v Minimum voltage : 30v Power rail...
  20. J

    Please help! 3-Phase rectifier + buck converter

    Im making a project where I need to rectify a 3-phase generator and charge a 12V battery. My buck converter is simulating fine using a DC source but when I connect my rectified power supply it messes everything up. This is my rectifier output. This is my schematic This is my rectifier's...
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