Electronics Forum / Components / October 2004

I found a strange things in my LEds device.
I made a "Batterless Bicycle Safety Lights" 12 months ago.
(http://www.freelights.co.uk).
The LEDs on the device are opened to the air, sometime raining, water

I have a device that uses 6 AA Batteries at one time. One of the dual coil
battery contacts is missing. Does anyone know where I can get a replacement?
I've tried Radio Shack and a hardware store and they didn't have one. Thank
you.

I just found a Metric Buttload of MC4024's (1978/1979 date codes).  Mostly
MC4024P plastic DIP packages, a few MC4024L ceramic DIP packages.  Found
the datasheet on Jim Thompson's website, stuck
one on a breadboard, hooked up a scope, and watched it do its stuff as

Do they make duel color LEDs that are blue and white? Actually do they make
them in any other color besides red and green? Thanks in advance

I have a portable electronic navigation system - a Pilot III from Garmin- which
I use to find my way around the counties in the state where I work. It operates
via batteries or by pluging it into the cigarette lighter.
While using the navigation system, the batteries exploded. As I ...

Anybody know where I can get either fiberglass or phenolic
PC board blanks *without* the copper on them?
TIA

Any suggestions for a supplier for a 0.5 mfd 1600 volt Capacitor that I need
to repair an oscilloscope?
Thanks in advance.

Is there such a thing as a chip that has a bit of flash and a bit
of regular ram on it?
THanks,
BSD_mike

I'm looking for some SRAM chips with the same pinout as eprom chips.
Does anyone know if there exists such SRAM chips?
And where can I buy them?
They need to replace a tms27c010a eprom. I have a battery DIP socket that is

Looking for a Zener diode of 13W for replacement of a faulty component
in a legacy system. Could anyone points to me where I can get one ?
Alternatively, can I use some small power Zener diode, together with a
transistor, to functionally replace the high power Zener diode ? It

I have MQ3 fuse. The datasheet says that it has maximum
power dissipation of 0.48 Watts, ampere rating of 3 amps and
maximum voltage drop of  0.2 volts. My question is that if it
dissipates 0.48 watts when the current is almost 3 amps, then how

    I am working on a design which will require a solenoid capable
of appx. a one inch throw (is that the correct term?) exerting a force
of appx. one pound with a response time of appx. 0.2 milliseconds.  It
will have to fit into a footprint of appx. 1.5 in. sq.  Overall length

I'm trying to find inductor replacements for a vintage power supply. Would
be grateful if you could point me to a supplier for replacements. These
are the main power inductors in a H740 PSU in a PDP-8/M.
- Type:       potted, square rectangular box

This is more of a general question but, is it at all possible to wire,
let's say, an iPod to a series of LEDs that you'd pick up at RadioShack?
Something along the lines of having the LEDs emit in response to the
music, similar to how a stereo's LED indicator  will pulses in ...

I'm trying to repair a 24 Volt refridgerator commonly used in charter
busses. I've found one pair of identical transistors where one of them have
an C-E short. The transistors are located in the control-unit providing
power for the compressor-motor.