Electronics Forum / Design / July 2008

Ok, guys, as predicted it's the pits. Digital TV cutting in and out at
random because of multipath and other disturbances. Analog never does
that, it simply performs better. But it's almost gone :-(
Besides the fact that newer antennas should have their UHF section tuned

I am trying to make a rubber keypad for one of my projects. I have
tried mixing graphite with the rubber to make conductive buttons but
with little success. I have also spent a lot of time looking on the
net for a source for the "carbon pills" the pros use. I am here asking

Hey there - I was just thinking about TC (Temperature Coefficients) of
ceramic capacitors. So the temperature coefficient (ie X7R, NP0, etc.)
specifies the low temp, high temp, and max capacitance change. In
general, does it affect things like ESR or anything else? For example,

more detail http://www.chinaicmart.com/series-100/100331.html
General Description
The 100331 contains three D-type, edge-triggered master/ slave flip-
flops with true and complement outputs, a Common Clock (CPC), and

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...on this schematic:
http://www.modularcircuits.com/download/h-bridge_sch_pcb.pdf ... D1-D4
(MMBZ5240BLT1) are 10V Zener diodes (yes, even though he drew them as
Schottkys).  Presumably D1 and D3 protect the high-side FETs Q3 and Q5,

Hi friends,
While browsing the web I found a very good link and thinks sharing
with you all.
It have so many informations on design, interview questions,  research

imagine a balloon floating in the air, and you give it a negative
charge. This pumps more electrons into it (or onto its surafce).
Giving it a positive charge (in relation to its suroundings) is done
by removing existing negative electrons. Once all the electrons are

i have a problem in figuring out the wierd negative current that
appeared in the cct i was simulating. a 5 volt battery to the base of
transistor, 12 volt battery via a relay to the collector and ground to
the emmitter. the transister is an npn transistor along with the

Ringing choke circuit and blocking oscillator are different names of
oscillator.
Are they same meaning or they are different circuit in practice?
How to distinctly identify  them?

wonder if anyone could say what the better way to transmit a composite
video signal over a few hundred feet would be ? Normally I would use a
piece of RG59 co-axial cable but I have been reading of claims that
using

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ringing choke circuit and blocking oscillator are often used circuits.
whats their difference?
Only different name?
Thanks in advance

Hi friends,
little help here. I need 2 design a circuit to play a prerecorded
music continuously, the length of the recording is only 30sec. I tried
APR9600 and connected it as per the datasheet, used it in auto rewind