The originality of this description is that the generation of tones BF is made using a DDS . And this not by using a special build , but easy to find in the drawer bottoms circuit components . The... Electronics Projects, 27C128 Frequency Generators "microcontroller projects,
The originality of this description is that the generation of tones BF is made using a DDS . And this not by using a special build , but easy to find in the drawer bottoms circuit components .
The main features of this assembly are :
– Generation 2 frequency 800 Hz or 400 + 1000 + 2600 Hz ( by moving a jumper)
– Generation of a single frequency of 1000 Hz
– Adjustable output level of a min level . 100 mV dc 600 Ohm 35.4 mV rms . in single frequency or 25.0 mV rms . 2 tones
– Spectral between 0.3 and 150 kHz sup Purity . 50dB
– Distortion lower than 0.01 % (by SFN )
– Powered by 9V battery consumption 8 mA or 50 hours of operation with alkaline battery .
– Switching automatic switching PTT .
Principle of Operation
How does a DDS?
In its simplest form, a DDS consists of a precision oscillator , an address counter , a prom containing the code and (analog digital / ) D / A converter . This is the solution that was chosen for this description.
Unlike the two frequencies generated mode 800/1000 Hz is 200 Hz or multiples in the case of the couple 400/2600 Hz signal is therefore renews at most every 5ms . To retain its simplicity in assembly, EPROM is addressed in binary mode and the software is written accordingly. With a 14-bit divider , the necessary crystal frequency of 3.2768 MHz is , which is fortunately a standard value .
source tk5ep.free.fr/tech/gene2tons/fr/gene2tons.php 27C128 Frequency Generators alternative link:
FILE DOWNLOAD LINK LIST (in TXT format): LINKS-1670.zip
Source: 27C128 FREQUENCY GENERATORS
Related projects
Implementing Smart Cooling Control for Induction Heaters with PIC Microcontrollers
Today, induction heating powers countless industrial processes like melting, heat treatment, and welding, plus everyday appliances like cooktops. Its key advantages? High...
Power & BatteryIntegrating Solar Power: Microcontroller-Based Approaches for Domestic Electricity
Abstract: Microcontrollers have found extensive application in endeavors aimed at reducing power consumption. The availability of microcontroller development tools has made them...
Power & BatteryEfficient Power Generation with Microcontroller-Controlled Thermoelectric Generators
INTRODUCTION The global demand for electrical energy continues to rise steadily, necessitating a shift towards renewable energy sources as traditional fossil fuels...
Power & BatteryOptimizing Performance: A Guide to Stacking Precision Power Supplies
1. Introduction Statement of Purpose Our project selection stems from the recognition that power supplies represent a crucial and costly aspect of...
Power & Battery10 Mistakes with Hiring a Home Solar Installer and How to Avoid Them
Are you thinking about installing a home solar system? If so, then you're on the right track. Hitting the pavement for the...
Power & Battery · PIC18F252BATTERY CHARACTERIZER using PIC18F252
Introduction This circuit is a battery characterizer that applies a fixed load to a charged NiCad or NiMH cell and measures milliamp-hour...
Muhammad Bilal
I am a highly skilled and motivated individual with a Master's degree in Computer Science. I have extensive experience in technical writing and a deep understanding of SEO practices.