Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Register Log in
  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by okbro

  1. O

    op-amp voltage regulator design

    yes the power supply should be Vcc>Vout+Vbe+op-amp swing > 5+0.7+12 =17.7V approx. yes, the op-amp should be operating as a differential amplifier with op-amp output, Vo=A(Vf-Vz), the op-amp may be operating as comparator, but why.
  2. O

    op-amp voltage regulator design

    yes as danadak said it works with LM358N(LM324) but not TL072. Also changing the load resistance or changing the zener diode breakdown current changes the output voltage, which should not be the case. also with LM358N I had to use +15V power supply. the same series version works with both LM358...
  3. O

    op-amp voltage regulator design

    i will recheck the circuit today but i think the TL072 operates with a single supply voltage ranging from 3V to 36V (or ±1.5V to ±18V for dual supply configurations). This should be sufficient for most low-voltage circuits, but considering the above comments: About the Input Common-Mode Voltage...
  4. O

    op-amp voltage regulator design

    i did that but the output is the same, i also change the diode reference voltage to the both the op-amp terminals but i get the same result. i am using proteus simulator.
  5. O

    op-amp voltage regulator design

    in the following op-amp based shunt voltage regulator circuit the output is supposed to be 5V, with Vz=2.5V and using equation Vout=Vz(R1/R1+R2) from standard textbooks. however in proteus is not working as expected the output is always 2.9V with R1=R2=10kohm and other values of Vz. why?
  6. O

    Transformer primary secondary inductance values

    I am simulating an inverter that uses a 12-0-12V transformer as shown. In my simulation part i need to enter the inductance values for primary and secondary winding. Does anyone know the typical value for the inductances? Thanks.
  7. O

    L293D Motor Driver Module +5V onboard problem

    hi thanks, i know the functionality of the power jumper. but i think the problem is not there, but the+5V pins(and the ground pins) that i had soldered and it was working just fine. Now I tried to trace the schematic(also previously done) but cannot find where the battery supply(12.6V) is...
  8. O

    L293D Motor Driver Module +5V onboard problem

    as i said in the beginning i checked the batteries and it is showing good ~12.6V and that is exactly why i am wondering why there is no voltage on the +5V pin?i checked the schematic of the shield and i can only imagine if the shift register IC is damaged(Kaput)
  9. O

    L293D Motor Driver Module +5V onboard problem

    there is nothing else, i have just connected to shield on top of the arduino board and applied the power via battery and checked the pin voltages...i also checked with another shield(the one shown is newer) but this board is also showing only 350mV instead of 5V.
  10. O

    L293D Motor Driver Module +5V onboard problem

    I had a working bluetooth controlled car made with arduino uno, L293 motor driver shield. After many months, i tried to use it but now there is no +5V on the board which was used to supply power to the bluetooth module HC-05. I checked and the power supply from 3 li ion batteries is 12.6V while...
  11. O

    ESP32-CAM problem after uploading

    i will try better power supply and post the result
  12. O

    ESP32-CAM problem after uploading

    the router DHCP list shows that the ESP32 CAM has the same valid IP address but the page is showing nothing, (problem loading page), any further advice?
  13. O

    ESP32-CAM problem after uploading

    hello, After successfully uploading code and removing the FTDI programmer, and applying external regulated 5V to the ESP32 CAM, when i try to connect to the given server at 192.168....., the server does not work showing problem loading page...there is nothing. how to solve?
  14. O

    PCB design verification

    Yes, I did and later on I found from the DFM tool provider why there is error and he said that it is nothing serious, he said "The software identifies one of the board online as circuits because your file has two board outline. Usually, there should only one outline placing in the outline layer.".
  15. O

    PCB design verification

    I have put the pcb layout in the first quardrant and attached are the new gerber files. is this ok? I am using a free PCB gerber file checker called HQDFM(download is free https://www.nextpcb.com/dfm.html) whether the pcb has any problem during manufacuting and the software shows errors as...
See more

Latest threads

New Articles From Microcontroller Tips

Back
Top