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 shokjok

  1. S

    Wish to buy Battery, Charger and Buck converter for 12V , 2A router

    Your smartphone lacks a mobile power cord? A loaded car battery should have plenty of juice to power your smartphone.
  2. S

    Parts required for a personal project

    I have only three versions of the 27C512 ( Intel, AMD, NEC), needing erasure and all are DIP-28 format. As suggested by rjenkinsgb, your location details are appreciated.
  3. S

    Impact of Tariffs on PCB Fab

    I was quoted prices for one and ten boards for my project then. That biz closed in 2020.
  4. S

    Switching negative voltages with a transistor (revisited)

    The chosen switching frequency will perform poorly. Perhaps you meant to say 50-200kHz?
  5. S

    im looking for a simple 8 bit dram refresh circuit

    The Apple II+ used 4116 DRAMs, other Apple II models used 4164 or denser DRAMS, with the same refresh rate. Tandy's TRS-80 Model 1 used the buffered /MREQ line to refresh 4116 DRAMS on its mainboard and Expansion Interface, but its chips were directly soldered to the PCB to prevent unauthorized/...
  6. S

    Impact of Tariffs on PCB Fab

    Like MaxHeadRoom78, I too am from Canada. I can get my PCB designs done locally, with NO tariffs. The merchant paid the tariffs on their stock. My own attempt at PCB fab resulted in one historic board that still works: a bike trailer tail light interface using analog components, no software or...
  7. S

    How to make string LEDs?

    A closer look inside the LED strings reveals flat or low-profile LEDs connected as Diver300 described. I don't know who supplies flat LEDs, and this project will be time consuming. I made name-in-lights displays in 1988 using regular domed LEDs, CMOS ICs, and a 9VDC wallpack - unknown how many...
  8. S

    Can I use this charger in every country?

    It may work in other countries, but will it meet their electrical safety standards ( not seen on the label)?
  9. S

    12v battery, 18v magic

    The 50A relay current capacity is standard with the auto relay model. There's no heatsink for the current/ voltage regulator on the PCB and it's not a switching PSU. Fault diagnosis should be straightforward.
  10. S

    I really need help

    1000 Sri Lankan rupees ( about C$4.60 as per a Google search). Something that small costs more to send with little benefit.
  11. S

    An Update On Tarrifs

    In Canada, we have SIN numbers. Is that also needed by JLCPCB?
  12. S

    Issues with speed sensor

    It's a Hall Effect sensor. No resistance or signal could mean a failed part. The meter indicates a good battery. I had this same problem with my 1990 Dodge truck, going through two sensors in one year.
  13. S

    What is the name of this tool ?

    Industrial steel pipeline cutter.
  14. S

    LED circuit for 1/6 scale diorama

    While a microcontroller provides the lowest parts count for this idea, the 555 with a 4017, 4072 and LED driver circuits is a design starting point.
  15. S

    Can anyone pls buy these

    If, as ZipZapOuch stated, vibrations loosen the SMT components on their PCBs, then that is reason for a product recall.
See more

Latest threads

New Articles From Microcontroller Tips

Back
Top