| JCSC - Special Issue on Mobile and Wireless Networking |
Journal of Circuits, Systems and Computers Vol. 13, No. 2 (April 2004) SPECIAL ISSUE ON MOBILE AND WIRELESS NETWORKING EDITED BY MASAKAZU SENGOKU View table-of-contents...
|
| Good book for high power PWM H-Bridge Motor Drive |
Does anyone know of a good book for designing high power DC motor drives using MOSFET H-bridges at 20Khz PWM and above. There are very few that seem to talk about circuits that actually work...
|
| Shift registers 74HC166, 74HC595 controlled over a long cable ? |
Hi, I built a telescope controller based on the Atmel AVR mega128 processor and two integrated stepper motor drivers. The controller's user interface is a small handbox with 8 bus...
|
| SMPS layout hints besides National AN-1149? |
Hello All, Does anyone know a really good app note or other document that explains layout guidelines for boost converters and the like to a PCB layouter? AN-1149 is pretty good ...
|
| 2N3055 barrier height potential |
Hi, Why does this device seem to have such a low inherent Vbe for a silicon tranny? Thanks, p. -- "What is now proved was once only imagin'd." - ...
|
| Designing A Boost Regulator |
Firstly, thanks to all the people who pointed me in the right direction about two weeks ago, with regard to continuous and discontinuous operation of boost converters. Anyway I've...
|
| multiple oscilators or shared ? |
Hi, I have a PIC circuit, operating happily with 4 PIC's, all doing their stuff, all running at 8mhz. Each one runs with its own Xtal. I am working on a redesign of this cir...
|
| PCB fabrication using spray photo-resist |
Hi all, It's been a while since I've posted; I hope that someone can help with a problem that I'm having. I apologise for the length of this posting; I've tried to be as c...
|
| free tcp/ip stack for the 8051 |
I know this may have been asked a few times but..(:-( Can anybody recommend a freee TCP/IP stack for the 8051? With source code, and preferably able to handle more than one socke...
|
| Telephone line amplifier |
does anyone have the schematic or a link for a telephone line amplifier for the speech line of a standard telephone? The type I am looking for is a two wire line in and two wire line out (th...
|
| How IC power by battery work |
Hi, Some of the IC do have a pin (i.e. the name is "Vbat", or "VBAT") for switching to battery source when the main supply is not available on the IC. How is this work ? ...
|
| need a 50:100 balun |
I'm testing Ethernet transformers from 30 to 80 MHz and need some 50:100 baluns. Know where I can buy them? Small with leads I can solder into a fixture?
|
| 27mHz and 2.4gHz conflict? |
Going to put a small camera and one of those 2.4gHz video senders in a radio-control boat. R/C is 27mHz. Is there anything in particular I should do to get the two radio systems to
|
| Will this transistor amplifier work in production? |
This circuit works very well on my breadboard... +5V .-------------------o | | .-. ...
|
| zener diode question |
Is there any practical difference between the various small (sub 1W) zeners such as the BZX55,79, & 85's (plus others such as BZY's that I cannot fully bring to mind at this moment) All...
|
| Closed-Loop Transfer Function |
There's something I don't understand about the closed-loop transfer function. Suppose you have a system like ---- D ---- P ---- | | ----- H ----...
|
| Pen plotter |
Hi all, I have an old but useful "mutoh" pen plotter that has blown it's power supply, complicated six different outputs switch mode thing. Any friendly Mutoh/OKI service engineers or m...
|
| Trigger on variation of an analog signal |
Hi all, I have an analog signal (0-5v) that is normally stable or slowly changing. I want to design a simple circuit (analog and digital) that triggers a line when a strong variat...
|
| Tightening Torque - FETs |
Where can I find the tightening torque specs for FETs against a heatsink?
|
| differential amp |
Hi, Is it possible to use a differential amplifer, single opamp single supply like this one: http://www.ecircuitcenter.com/Circuits/opdif/opdif.htm to ampifly the difference ...
|
| IC to protect against voltage faults? |
I've heard somewhere of a circuit (or IC?) that will turn off your voltage source to a motor if the microcontroller that controls the system malfunctions (e.g. latches up). If a square wave ...
|
| Simple headphone-activated speaker bypass? |
Greetings, I have a simple audio circuit with an 8 ohm speaker being driven by an op-amp. I've been trying to figure out the simplest method to add support for headphones... the ...
|
| Ironing out the step by step design procedure for AN4143 |
http://www.fairchildsemi.com/an/AN/AN-4134.pdf http://www.fairchildsemi.com/collateral/AN-4134.xls The xls file is to be used with the design steps in the pdf file. In...
|
| reed switch fails........open or closed? |
When a reed switch fails, does it usually go into an "open" condition at time of failure, or does most often show a "closed" condition at time of failure, and there-after? ...
|
| What do they "degenerate"? |
I'm a mathematical physicist/computer scientist, not an EE and elementary electronics books are not in my library nor in my past. I've run across terms like "emitter degeneration resistor" ...
|
| Electronics Search FAQ - Pointer |
Archive-name: sci/electronics-search-faq Electronics Search FAQ - POINTER http://www.eetoolbox.com/search/index.htm http://www.cera2.com/search/index.htm http://www.eg3.com/s...
|
| Seeking circuits for suround sound systems |
I'm trying to find some circuits that I could build to implement a suround-sound system to compare it to a more tranditional one. While I'm capable of building and programming a DSP-based s...
|
| Adding dual-voltage to an SPS? |
I've got a battery charger for a power tool. Input voltage is spec'd at only 120 VAC. Is it reasonable to think about modifying the switching p.s. to encompass 240 VAC as well?...
|
| In phrase of LTC Spice |
Well, I've downloaded it several times, but I actually used it for the first time last week. It worked without bugs, and was sufficiently intuitive for me to get it working withou...
|
| Re : Help needed on the Heart Rate detection |
Hi there, I am wondering whether is there a Simple schematic for a Heart Rate monitor using infared LED. My idea is to design a simple heart rate monitor which detect heart ...
|
