Hello All,
I have been reading the list now for a little over four weeks
and am very impressed with the quality and quantity of
technical information.
I apologize if this is not an appropriate topic for this forum.
Hopefully this discussion can beneficial/enjoyable to others,
if not feel free to E-mail me directly - or ignore me
entirely... ;-)
I am trying to make an IBM PC controlled function generator
that uses the MAXIM038 IC[sine, triangle, and square wave].
The target frequency is 10 Hz to 10 MHz (maybe up to 20 MHz
depending on how hard it is). The inputs to the MAXIM chip are
quite simple. The power supply requirement is +/- 5 Volt. The
fundamental output frequency is determined by the input
current(about 10uA to 700uA) divided by an external capacitor
value(20pF to 100uF). One side of the capacitor is tied to
ground. Fine frequency, and duty cycle adjustments are also
available. I am planning to use a digital-to-analog chip to
control the input current.
My questions:
1) What type of relay(s) should I use to switch in different
values of capacitors - Or does it make much of a difference?
Where can I get this relay?
2) Does anybody have a suggestion/experience in using a program
to design single/double sided PCB for home projects?
3) Does the copier/LaserJet toner to plastic to PCB work very
well.
4) What is the practical limit of a digital-to-analog chip on a
homemade circuit board 12bit, 16bit?
5) Does anybody make a frequency counter chip that is easy to
interface to a computer?
For anybody that is interested, the MAXIM website is:
http://www.maxim-ic.com/
I do appreciate any advice that is available.
Thank You / Best Regards,
Jerome Peters KC6ENE,
Santa Clara California
E-Mail Jerome_Peters@el.nec.com
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