AT&T Usenet Netnews Service Shutting Down
Please note that on or around July 15, 2009, AT&T will no longer be offering access to the Usenet Netnews service. If you wish to continue reading Usenet newsgroups, access is available through...
View ArticleAltera Flex 10k probleem
Hi, I have a problem with bringing out the INIT_DONE puls out of an Altera Flex 10k EPLD. I use Quartus II software on a PC. I also use the EPC2 configuration device. I enabled this bit in the design...
View ArticleTips For Installing A Headphone Jack
I just purchased a new Apex stereo TV/DVD combo with many bells & whistles EXCEPT a headphone jack. Have any of you readers been able to successfully install a stereo headphone jack into a stereo...
View ArticleElektor EPROM Emulator flaky
I constructed the EPROM Emulator published in Elektor magazine in the SEPTEMBER 1992 issue. It worked quite well under Win98, but lately I started using it on a HP Compaq nx9010 Pentium 4 laptop using...
View ArticleSerial Port Design for Z80 - Questions
Greetings! I wanted to add a serial port to my 1981 Gorf arcade machine. Since it is really just a specialized Z80 computer, I was just going to tap the signals from the Z80 pins and create a small...
View Article220V Electronic ballast
Does anyone have a good site to purchase electronic ballasts in Canada? I bought a shower with a circular T9 fluorescent bulb in it, but the SCRs on the ballast started smoking the second day the...
View ArticleClik here to view.
Frequency Standard - GPS or Rubidium?
Hi all, I'm looking for some sort of frequency standard (10 MHz ref.?). Ebay has rubdium standards for under $100.00 and there are GPS controlled OXCO standards for $100.00 plus. My question : Is a...
View ArticleSafety considerations
For years, some retail and restaurant chains in the United States have been equipped with non-ionizing sources positioned to provide floor coverage. They emit a directed modulated beam, tuned to mimic...
View ArticleSegger Flasher 5 Programmer
Looking to buy a used Segger 5 programmer to read existing data from ST9 MCU. Thank you ... Please reply to jrepairman at gmail.com
View ArticleAnyone make a current/voltage watt-hour meter with RS-232 output?
I want to impliment a PC-based data logger for my home energy usage by measuring my total current, voltage, and power readings at my main breaker. I know there are products that do this and have...
View ArticleVariable Binary Counter?
Hello, I'm putting together a circuit that uses a binary counter to cycle through addresses of SRAM. I would like to vary the number of addresses used while the circuit is running. Does anyone know of...
View ArticleLM3478 design gets insanely hot
Hello Experts, This is my first time designing a SEPIC type switchmode power supply with the LM3478MM from national as my controller. My design is pretty much the standard application as shown in the...
View Articleoftware program that can do audio frequency sweeps tia sal2
Greetings All Can someone recommend a good software program that can do audio frequency sweeps through the computer sound card, without me having to type in and test each frequency separately. Example:...
View ArticlePulse sequence from camera I.R. remote
My Canon G2 has an InfraRed remote shutter release. Is there any way I can find out what is the timing and frequency of the pulses it transmits? I hope to make a timer that will take an exposure every...
View ArticleNeed 2 ms hardware timer
I am looking to implement a 2 ms hardware timer function. Condition is the Input goes from High to Low and stays Low indefinitely. Output should be a 2m positive pulse. I looked at the 555 timer, but...
View Articleabout hFE multimeter test...
Hi all... a transistor "BD435" is giving me 440 in hFE test on the multimeter, when the tecnical data i've found tell me min=40 max=475... does this mean the transistor is really in good shape? can it...
View ArticleWhat value pot?
My new digital FM tuner puts out too strong a signal compared to my other inputs (TV and CD). I want to install a dual pot between the tuner and preamp to reduce the volume. What is the best value pot...
View ArticleMains powered outdoor delay switch
Since pneumatic or mechanical delay switches with outdoor fitting kits are extortionately expensive, I was wondering if anyone had a good circuit for making my own... Ideally a single button press...
View ArticleHelp Building a USB-Controlled USB Outlet?
I am a novice and would like to build a 120V AC outlet which can be switched on and off by USB. I'm not sure what all I will need and want to make sure that I'm not trying to do something much harder...
View ArticleNeed current sensing relay
Hi folks, I'm looking for a relay I can put in series with a TV set to sense when it's on. The TV uses between 175 and 240 Watts, depending mostly on the backlight setting -- it's an LDC TV). So the...
View Article