thanks,
David M.
--------------------------------------------
On Fri, 11/27/15, toblueiis toblueiis@yahoo.com [B9Builders] wrote:
Subject: [B9Builders] flasher circuits forthcoming, D
To: B9Builders@yahoogroups.com
Date: Friday, November 27, 2015, 8:46 PM
hello,
One of the interesting things about the group is that people
have different interests and abilities which often guide
their approach to some aspect of the B9. I am working on
several flasher design circuits that I would make available
to the club when completed and tested, but I don't have
plans to build them at this time. I will be providing
circuit schematics and component layout drawings. The
circuits are simple and require no programming, but you need
to gather the parts and build the circuit, including
soldering. The parts are simple and inexpensive. A
frustrating aspect of working on the designs, is that I keep
getting alternative design ideas for the circuit and for
component layout. An example of this, is that I noticed
that the trip points on a simple circuit, used as 6
oscillators per chip, change according to the supply
voltage. It flashers about once per second at 12volts and
about 3-4 times per second at 4-5 volts. This makes it easy
to change the flashing speed of 6, 12, 18, etc... lights by
just changing the supply voltage to each chip. To boil this
down, multiple, independent flashers can be changed from
slow to fast with a simple signal. This is without
programming at all. If you like to build circuits, you may
be interested in this. I have tested the basic circuit, but
don't want to release the complete circuit till it has
been wholly tested. The design I am working on would be
flexible to different voltage bulbs , as well as
incandescent or LEDs.
The good thing about keeping getting design change ideas, is
that both designs, schematic and layout, are efforts to
simplify and cleanup the circuits. It is hard to get to a
finished design, but at least it is for a good reason.
When I change a design component, it usually ends up that I
need to order parts and it takes 3 weeks for me to get them.
It would cost me a lot more for parts if I would buy them
closer and since I am experimenting, I buy larger amounts.
As some of you out there know, experimenting can be quite
expensive. Another criteria, is to use relatively
inexpensive parts.
Though I am not ready to offer these circuits, I mention it
at this time for guys who may be considering such circuits
and trying to decide what approach they will take. This is
an option for them to keep in mind . For those not wanting
to build electronics, the club has a great option available
from Tom W.
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