Electronics Forum / Design / June 2005

Hi, I'm interested in a EPROM programmer, I would like input and
recommendations.
The devices I would program are MCU by Atmel,  PIC's and varies serial
EPROM's. By voltage range is 2.5 to 5v.

Andy writes:
In the June 2005 issue of Wireless Design and Development,
the editorial director, on page 6, presents a website in which
an MIT student working on her thesis has a .pdf file which

Used to make this stuff wiv mum when I was young. No, that's wrong.... I
made the scones, bigger sis made the melting moments and big sis made the
flapjacks, I think.
Dad made the bread and it was rock hard... but tasty wiv a nice texture,

http://earth.google.com/
sheesh, now I can(almost) find out when people post crap usenet
messages from.
Then I'll send in the troops and ruin your day

How would the good old LM324's input current at the + input with 2.5V at
the + input and a power supply 0-1V (and the - input in the same range)
be ?
Are there some unwanted diodes not shown in the schematic diagram of the

how to calculate the total capacitance of this resonator?
http://www.geocities.com/aezzat3/resonator2.jpg
should i first terminate the 2 ends with a 50ohm resistors or i can
calculate it directly?

As a project, I want to build a rear-view camera system that I can
mount on my motorcycle.
Where should I start from to make it?
digital camera + LCD pannel + some wire works to install switch and

i am in the process of desingning a 220Vac operated 1500W OFFLINE
charger/supply.
It should provide power factor correction, isolated o/p and I prefer
soft switching.

I am using a 40Hz -3dB RC lowpass filter, and then a 40Hz 1 pole
digital lowpass (100Hz sampling butterworth generated from here:
"http://www-users.cs.york.ac.uk/~fisher/mkfilter/trad.html").
What is the effective -3dB frequency for the combination of these

I am a last year Electronic Engg student and about to start a research
project and I want a topic that will have very big demand in future,
but I can't think of something extraordinary, so can anyone please
suggest me some innovative ideas. I am open to any hybrid topics as

I am trying to connect an 8x8 membrane keywitch to a PC/104 and I was
just wondering if there is a module or software available that will
allow me to quickly do this.  I know I can do it with writting some
software with a 16 I/O board but I wonder if there is something out

I was wondering if anyone has a circuit design  for a simple VHF frequency
doubler.
cheers,
Kevin.

I am having my house re-wired. On one floor, the lamps are fed from a
lighting controller (a bit like a Lutron controller) which outputs a
chopped waveform to dim the lights.
It is very difficult to avoid routing some of the 2A lighting circuits

Morphing to evaid killfiles noted:
From: Fred Bloggs <nospam@nospam.com>
User-Agent: Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.0.1) Gecko/20020823 NNTP-Posting-Host: 4.152.78.129
X-Trace: newsread3.news.atl.earthlink.net 1119802859 4.152.78.129

   I am the legitimate owner of a copy of the DOS based Tsien
Boardmaker 2 PCB design program which operates with a 'dongle' unit
connected to the parallel printer port.
 Of late, the dongle has become rather erratic in operation and Tsien