Electronic shutter? [8 articles]
Robert Roland - 12:00 20-11-08
I am looking for a relatively inexpensive device that can switch
between transparent and opaque at up to about 100Hz. Where do I find
such a device?
I have tried googling for ... Read More
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Low Voltage Cutout [3 articles]
09:50 20-11-08
Hi
I have an access control system running off a float charged battery.
If there is a power outage of +-8 Hours, the battery drops to a level
lower than the access-control sys... Read More
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Financial meltdown [3 articles]
JosephKK - 09:33 20-11-08
Take a peek at this if this works:
Blame Cheap money-Asian savings-Greedy banker-Deregulation (a prime
suspect) for 2008 crash-A short history of modern finance-E
... Read More
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Pwr suppley Problem [3 articles]
scott93727g - 09:31 20-11-08
Pwr suppley Problem
I made a power supply with 3 paralelled LM338 Regulators in paralell
(24V 12A trans), with 2 paralelled 20A rectifirs, worked great for 1
week, then all of a... Read More
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Log-Periodic Antenna Design [30 articles]
Rich Grise - 09:18 20-11-08
My current UHF antenna is a 14" Radio Shack clip lead clipped from the
center of my coax to the venetian blind. I have to hand-adjust it
for the channel, weather conditions, pha... Read More
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DC-DC isolating converter [7 articles]
Michael - 08:58 20-11-08
I need to separate noisy part of the circuitry from the sensitive one.
Does anybody make isolated DC-DC converters with reasonably low
interwinding capacitance (or shield winding... Read More
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Rukycon capacitors [4 articles]
RHRRC - 08:58 20-11-08
Against a spec for low impedance electrolytics the contractors (in
ROC) have included for Rukycon SXE low impedance devices and have
forwarded the datasheets thereof.
I can fi... Read More
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Voltage spike protection [13 articles]
Efthimios - 07:19 20-11-08
Imagine a device working at 1 Volt.
I what to protect it from a voltage spike of 50 to 100 Volts.
Does any know how to do this in a cheap way???
Efthimios
... Read More
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Trickle charger advice [17 articles]
Alexander Avtanski - 06:53 20-11-08
Hello,
I'm working on a hobby project (something like a really fancy timer).
The thing will be powered mostly from the grid, but when necessary I
should be able to unplug it a... Read More
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Semi-universa CMOS Xtal OSC [11 articles]
Robert Baer - 06:52 20-11-08
Plug crystal into appropiate socket; each has its specified load.
The drive resistor shown is the maximum value that allows all
frequencies of a given type to oscillate; s... Read More
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Chinese antique
xjx588 - 06:17 20-11-08
Q2hpbmVzZSBhbnRpcXVlCndvcmxkIGZpcnN0LCB0aGUgYW50aXF1ZSBjaGluYXdhcmUgc2VyaWVz
IHBsZWFzZSB3YXRjaCEKRW50aXJlIGZpZGVsaXR5IDEwMCUgQW50aXF1ZSAoMTkxMi0xOTQ5KSBS
ZXB1YmxpYyBvZiBDaGluYSBw... Read More
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Chinese antique
xjx588 - 06:15 20-11-08
Q2hpbmVzZSBhbnRpcXVlCndvcmxkIGZpcnN0LCB0aGUgYW50aXF1ZSBjaGluYXdhcmUgc2VyaWVz
IHBsZWFzZSB3YXRjaCEKRW50aXJlIGZpZGVsaXR5IDEwMCUgQW50aXF1ZSAoMTkxMi0xOTQ5KSBS
ZXB1YmxpYyBvZiBDaGluYSBw... Read More
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