All Activity

This stream auto-updates   

  1. Today
  2. Transformers pass alternating current and normally are used to step up or step down voltage. The reason to change or replace the transformer is to fix damaged that can be caused by gross under loading and impedance mis-matching, among other things. Transformers can carry dangerous levels of electrical power, so be careful while replacing the transformers, it may cause serious injury or even death. The replacement transformer must be a low-voltage dry-type, meeting or exceeding the TP-1 efficiency standard. The rated size (kVA) of the replacement transformer must be equal to or less than the existing transformer replaced.
  3. Hi all, I'm new here!. I created a pcb board of this schematics: http://www.electronics-lab.com/project/optically-isolated-lpt-breakout-board-for-cnc-routers/ and it did not work and I'm trying to find out which part went wrong. I need to ask first what should the VDD voltage be?
  4. Yesterday
  5. Last week
  6. I am just a tinkerer so I'm looking for advice. I have a project using an ESP8266 to control a light. I am using a Panasonic AQY280EH to switch the light. What is the safe protocol for mounting and connecting a device that is using a high voltage. Thanks
  7. Yes, I am looking for good web links which provide intensive information about electronics especially PCB electronics. Earlier I have read some website of electronics like solder.net, IPC.org and ipctraining.com websites which gives me a lot of info about IPC courses also.
  8. Tri-State Bariatrics
    Tristate Bariatrics consists of board certified and long-standing Hospital recommended Surgeons providing the New York area with expert surgical weight loss procedures.

     

  9. I have a hand full of MCP23017 (16 bit multiplexers/ I/O Expander) but I can only get 8 IC on the bus due to the limit of address but I need 200 pins (about 13 ICs) for a 8*8*8 RGB cube and was thinking about and wondering what issues I might have if. A. changing the addresses of the IC actively OR B. use a transistor to disconnect the clock of on set of ic's and control the other set I don't like the idea of a shift register because of size and programming headache MCP23017 data sheet
  10. A zener diode is used with reverse bias voltage. A temperature sensing diode is used with forward voltage that is completely different. Look at the datasheet of a 1N4148 diode. Its forward voltage is shown at -40 degrees C, at +25 degrees C and at +65 degrees C. The forward voltage drops as the temperature of it rises. Test it at a current of 0.1mA to 10mA at different temperatures.
  11. yo mike, where are you?
  12. Property Management Company Austin
    At ACA Property Management, we understand that the real estate industry can seem overwhelming sometimes for both tenants and homeowners alike.

  13. Can I know which component senses heat or acts as heat sensor in the following circuit? In the given diagram, it is said that the 1N4148 diode acts as the sensor. But basically it is a zener diode and I don't think that it is able to sense temperature shift. This circuit provides a working model but the sensor remains as a mystery for me. Can you please help it for me? Then how to test 1N4148?
  14. hi all, just joined the forum. my name is pete and I live in s. florida. i'am a retired electronics field service tech for Philips . I built an l/c meter I found on an web site. its called LCM3. it works very well. I have some questions about the ESR in circuit measurements. there is a probe that you construct for this purpose. how do you calibrate the meter with this probe in place? should the meter display both the capacitance and the esr value? I burned the pic with Ver.1.25. does this code implement in circuit measurement or do you have to use Ver.1.35? the article for this meter can be found here: scorpionzblog@gmail.com p.s. i'am in the process of building Mike's version of this meter.
  15. Indianapolis SEO
    We offer professional SEO services that help your website increase its organic search score drastically in order to compete for the highest rankings including highly competitive keywords.

  16. Earlier
  17. Property Management Cincinnati
    At Balanced Property Solutions, we’ve earned our reputation as a trustworthy partner by working hands-on with owners and investors across the Greater Cincinnati area for more than 25 years.

  18. My experience with Seeed Studio for pcb manufacturing is so far very positive. I've made more than 20 different designs using their service over the last two years and nearly all were perfect. Only in one case they made the silkscreen a bit unclear but not too bad to discard the boards. For the price they ask they are really good.
  19. An interesting case of using different pieces of software on ARM-based devices (Raspberry Pi, Odorid and NanoPC) includes WPS Office and Adobe Acrobat Reader. Here are the details - https://eltechs.com/miracles-still-happen
  20. Restaurant Steamer | Our steamer will cook your food faster with less power and water consumption than other steamers on the market.

  21. Hi Prithul, I believe the answer you are looking for is here: "http://electronics-lab.com/community/index.php?/topic/29563-0-30v-stabilized-power-supply/&page=84" audioguru: Post August 31, 2014 A bit more was mentioned on page 87 Please open a new thread if you want to find out more, as this thread is for completed projects. Thanks
  22. Please delete. Posted in the wrong thread. Sorry
  23. TeamViewer, VNC or SSH + X11 are the 3 ways to run a remote desktop on Raspberry Pi. Learn the details from my article and chose the best one for you.
  24. Trademark Attorney
    Taylor IP provides a complete line of IP legal services for all of your trademark needs.

     

  25. If you need to build up an automatic backup process on an ARM device, learn this tutorial for setting up CrashPlan on Raspberry Pi as an example. You may use this for any ARM-based device as well.
  26. I just wanted to share how I solved a problem with burning the bootloader to some new Atmega328P chips I bought from Digikey. I've been having no problem burning sketches to ATtiny84 chips, but was confused on why I kept getting no response from the 328Ps. Double checked the wiring a dozen times. Finally found this excellent web page, with helpful step by step instructions and useful arduino programs, including a self-contained boot loader . The trouble was the fuses had been set to require an external clock, which I fixed, as instructed, by using a clock signal from pin 9. In case anyone else has this trouble.
  27. I just wanted to share how I solved a problem with burning the bootloader to some new Atmega328P chips I bought from Digikey. I've been having no problem burning sketches to ATtiny84 chips, but was confused on why I kept getting no response from the 328Ps. Double checked the wiring a dozen times. Finally found this excellent web page, with helpful step by step instructions and useful arduino programs, including a self-contained boot loader . The trouble was the fuses had been set to require an external clock, which I fixed, as instructed, by using a clock signal from pin 9. In case anyone else has this trouble.
  28. I got my stm32 board recently, and become very exciting to try it. But when I setting up development environment, it just make me sad. For STM32 there is no official IDE, I have to chose between third party IDEs. However, they either asking for hundreds of dollars, or not fully works, or looks they are developed for windows 3.1, or just all of above. Few IDEs are based on eclipse, but all of them even not support my STM32F7 board from ST it's self. WTH??? For the MDK (Keil), yes, everything is works, but the GUI is just terrible, I don't mind it looks ugly but at least it should provide a theme feature or able to switch to darker color other than black and white. After half hour coding, I look to the wall and also be able to see my code there (AFK debug feature? lol). In recent version they finally supported auto completion, but it just works some time. For VS2017+VisualGDB, VS2017 is great but VisualGDB only can compile and download, when I lunch debug VS says fail to attach gdb. Currently, I write Makefile manually and managed to make it work, but I don't thing this whole pain is the a** experience is reasonable in 2017. Before, I was using Atmel AVRs with their Atmel Studio, everything just works without any issue and not extra configuration required. Even for Microchip PICs, the MPLAB-X only works sometime, but at least I can get the job done without make me blind and don't asking for hundreds of dollars. BTW, Is there a better solution available?
  29. WellPCB http://www.wellpcb.com WELLPCB is focusing on online prototypes orders, to meet the requirement of Low cost, Fast delivery, Easy order for customers around the world.
  1. Load more activity