|
Digital DDS Function Signal Generator Sine
Square Sawtooth Triangle Wave Module
|
|
|
|
|
|
|
|
|
|
|
|
Description: |
-
100% brand new and high quality
-
After all the installation, connect the power
supply,right adjust the resistance 10K and you will see the character.
-
Adjust the character to clear type.
-
This signal generator has two outputs - one for
DDS signal and another for high speed [1,2,4,8MHz] square signal
- which may be used for reliving microcontrollers with wrong fuse settings or
for other purposes as well. High speed (HS)signal is direct output from Atmega16
OC1A(PD5) pin.
-
DDS output is used for all other signals
that are generated via R2Rresistor network and is adjusted via LM358N offset and
amplitude regulating circuits. Offset and amplitude can be regulated by two
potentiometers. Offset can be regulated in range +5V..-5V while amplitude in
range 0..10V. DDS frequency range is from 1 to 65535Hz that is more than enough
for testing audio circuits and other tasks.
Main AVR DDS signal generator features:
-
Simple circuit with easily accessible and cheap
components;
-
Dedicated high speed (HS) signal output up to
8MHz;
-
DDS signal with variable amplitude and offset;
-
DDS signals: sine, square, saw, rev saw, triangle,
ECG and noise.
-
2×16 LCD menu;
-
Intuitive 5 button keypad.
-
Frequency adjusting steps: 1, 10, 100, 1000,
10000Hz;
-
Restoring last configuration after power up.
-
In the block diagram you may see logical structure
of signal
generator:
As you can see device requires several voltages: +5V, -12V, +12V, GND. -12V
and +12V are used for offset and amplitude control. In this case power supply is
constructed by using simple transformer and few voltagere gulators,
et:7812,7912,7805.
LCD menu control
All actions can be viewed in LCD menu. Menu can be
controlled with 5 buttons that are next to LCD module.
-
Up and down arrow buttons are used for browsing
menu while right and left arrow buttons are used for changing frequency value.
When middle button is pressed - signal generating starts. Press middle button
again to stop signa generator.
-
Important to notice, that there is a separate menu
for changing frequency step. This is convenient if you need to change generator
frequencies in wide range. This allows to set any frequency with relatively few
button clicks.
-
Noise generation don’t have frequency setting. It
uses simple rand function where results are continuously output to DDS output.
High speed signal has four frequencies available: 1, 2, 4 and 8MHz.
Circuit diagram of DDS generator is very simple with easy accessible components.
It uses following parts:
· AVR Atmega16 microcontroller clocked with 16MHz external crystal;
· Standard HD44780-based 2×16 LCD module;
· R2R DAC made of simple resistors(1% tol);
· LM358N low power dual op amplifier;
· Two potentiometers;
· 5 buttons;
· several connectors and sockets.
We offer a programmed IC and all components in the suite.
|
Package includes: |
- 1 x DDS Function Signal Generator Module Sine Square Sawtooth Triangle Wave DIY KIT DIY Kits, not soldered,
|
Payment:t: |
-
We accept payment through Paypal ONLY.
If you
do not have Paypal account, please registered with (http://www.paypal.com)
Payment must be received within 5 days after auctions ended. Please do not
bid if you are not intending to buy. Unpaid dispute will be filed to ebay
for the non payable bidders.
|
Shipping and handling:: |
|
Return Policy: |
-
We
are not responsible for custom duty or import
tax.
-
We will leave POSITIVE FEEDBACK
after receiving the payment. Please contact us if
your are
not satisfied with the item after receive
it.
-
We could offer
refund,
and refund request is available only requests
within
a week after parcel received & returning the
item as
the same condition as received.
-
We offer 100% refund if the item is broken before
arrival,
all you need to do is sending us the clear
pictures
to show it is broken. Defective situation must be
noticed within 7 days after delivery.
-
All emails will be answered within
1
business day. If you do not receive our reply,
please kindly re-sent your email,and we will reply
to you as soon as possible.
-
All items sold by us
are being described to the best of our abilities, as
accurate as possible, and with utmost
conscientiousness on our part.However, to avoid any
potential oversights, I respectfully request your
assistance in helping us to make this a mutually
satisfactory transaction by Thoroughly reviewing
item description and photos, and asking all
questions Prior To Bidding.
-
Please Note that size
and color representation are subject to
manufacturing variance and may not be exact. Also
note that monitor settings may vary from computer to
computer and may distort actual colors. Please read
these terms thoroughly before placing your bid.
|
Feedback: |
-
We will automatically
leave a positive feedback to everyone who has
complete the transaction and leave us positive
feedback.
-
Please do not forget
to give us Five Stars on all of the Detailed Seller
Ratings. Thanks!
-
In the unlikely event
you are not satisfied with the transaction, please
contact us before you sumbit your evaluation. We
believe that everything could be solved by
communication.
1.in order to provide you the best
service*****,please treat the transaction
fairly.*feedback is simply what we pursue.
2.Please Do contact us first to get a better
solution before you would leave a *neutral or
*negative feedback
3.We strive for 5-star service by stating upfront
our policies, our shipping rate& our shipping
frequency. if you were pleased with this
transaction, please respond with all 5 stars! if you
are not pleased, simply let me know via e-mial
rather than leave low score, and I'll work to make
it that way
4.Please email me through 'MY MESSAGES' or "Ask
Seller Questions" if you have any question about our
listing or your purchase
|
Contact us: |
-
We are in
Shenzhen of Pearl River Delta which is developed
place with economy and Trade We are a profession
trade company. There are about 16000 kinds of
products in my company,Our products include consumer
electronics, Nail Art Tools, Clothes and shoes, cell
phone accessories, computers
accessories, car accessories, Motorcycle accession,
toys & hobbies, jewelry, baby accessories other useful electronics
items and etc
-
If you have any
problems, we are very glad to help you. We rare
handling large volume emails every day. Please allow
us to reply your email within 24hrs
-
For the functional
products in our shop (such as: Chargers, Data
cables), which function is the same as description,
but the actual color and shape may looks a little
different from pictures because of the technical
improvement and actual stock state. Please be
advised before you bid.
Copyright(c)2005 wangdecheng9898 All Rights Reserved
|