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AVR Beacon Super Keyer - The keyer will send both "Normal" and
"DX mode" Feld-Hell, at the standard 122.5 bits/second, as well as
half-speed, quarter-speed and eigth-speed. The slower speeds are less
affected by multi-path, and are also less affected by noise......
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AVR composite PAL colour bar generator - After lof of reading
books, articles and discussions with lot of electronic technicians,
finaly I did it. I make an 6 colour bar generator entire-in-software
with AT90s2313-10 overclocked at 17.734475 MHz !!!
.(Circuit design
added 05/09) |
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AVR Digital Voltmeter - Most electronics hobbyists these days
find a digital voltmeter indispensable. Indeed, having more than one is a
positive advantage!This little project with six voltmeters in one
inexpensive box therefore has some very useful features for the
hobbyist......(electronic circuit added 4/05) |
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AVR Dotmatrix - avrDotmatrix, Is a 5x7 LED Matrix Display
controlled by a ATMega8 to display scrolling text, time or temperatures.
The pattern is generated with multiplexing the 5 matrix columns
and...(circuit added 02/09) |
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AVR Firmware Monitor Program - (schematic / circuit added 6/07) |
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AVR Frequency Counter - How would you like a 40 MHz frequency counter for
under $50? What if I told you it also had an 8 digit LCD display, optional offsets for
use in a receiver or transceiver, 10 Hz (even 1 Hz!) resolution, and also a six
channel digital voltmeter built in? Direct reading with prescalers in the VHF version?
Oh, and optional PC telemetry so you can watch the output on a PC, log the results, or
graph drift? Well, read on!.... |
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AVR In-Circuit Programmer - The programmer is very simple to build. It
contains one IC and a couple of connectors. As you can see below, with some ingenuity
it is possible to squeeze all the circuitry into a DB25 connector shell. The IC can be
a 74HC244 or a 74LS244. The more normal means of construction is with a small circuit
board, with the DB25 connector mounted on one edge, and a header to connect the ribbon
cable. The programmer is designed to work with all the AVRβ’ family micros, and with
the Atmel "ISP" programming software.
.(electronic schematic added 11/08)
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AVR In-System Programmer - In-System Programmer (ISP) This programmer can
program lot of AVR micros and its working with AVR Studio 4.
.(electronic schematic
added 05/09) |
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AVR ISP Programmer - This board can program an AVR microcontroler ATMEL
(ATmega8, ATMega32,.....) from a parallel printer LPT1 using ISP functionality In
System Programming. This programming type can program and/or configure
microcontroler directly on the target board without rmoving device and put it on a
separate programmer. This board is compatible with programming software
"PonyProg".
.(electronic schematic added 11/08) |
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AVR ISP Programmer (In-Sytem programmer) for ATMEL - This AVR ISP original
by ATMEL you can found on "AVR software and technical Library, April 2003" CD-rom.It
small component count I design new PCB and change some component that easy to build
small PCB .The new firmware was writen by John Samperi for AT90S2313. This code
can program more devices.
..... |
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AVR LCD terminal - The LCD display is represented by the connector X1. It
has a HD44780 compatible LCD controller and I'm using the 4-bit interface to send data
to the LCD controller. The LED's are multiplexed. I've seen the circuit somewhere in
the web. It is possible to connect 12 LEDs with only 4 tristate ports with this
circuit. You can address the LEDs setting 1 port high, 1 port low and 2 ports to high
impedance. I've only used 8 LEDs because of space problemes in the aperture.....
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AVR Programmer + Info - The AVR family of `micro-controllers' (uCs) have
their own, non-volatile memory; your program and data are safe, even if all power is
lost. These chips also contain most of what is needed to program them. If you connect
an AVR to the parallel port of a PC loaded with the right software, a `programmer',
then PC and uC will happily talk each other through the procedure. Uploading a program
to the chip takes just a few seconds and very little hardware. It can even be done
while the uC is `in-circuit', sitting in the apparatus you want it to control. A
program already in the chip can be erased by the same `programmer'; there is no need
for ultra-violet light or a special power supply.
.(electronic schematic added 11/08)
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AVR Serial Programmer - Note that the AVR910 programmer does not support all
AVR processors, especially the newest chips. Be sure to check the documentation to see
if it supports the version(s) of the processor you are interested in
.....
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AVR Thermometer DS1621 - This small thermometer board can be connected
directly to PORTD of the AVR 2313 Project board. It uses the Dallas DS1621 Digital
Thermometer and Thermostat chip. The DS1621 measures temperatures from -55° to +125°
in 0.5° steps and doesn't need calibration or external components. It has also a
build-in thermostat with high and low set-points which can be programmed by the user.
Below you see the pin description of the DS1621.
.(electronic schematic added 11/08)
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AVR Thermometer TCN75 - This small thermometer board uses the Microchip
TCN75 device. It is a cheaper clone of the LM75, it costs about 2,50 Euro. The TCN75
comes in a SO8 packaging. The TCN75 is a serially programmable temperature sensor. It
has an output that is programmable as either a simple comparator for thermostat
operation or as a temperature event interrupt. Hysteresis is also programmable.
.....
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AVR-USB Remote Sensor - RemoteSensor is a wireless thermo- and hygrometer
with an USB port on the receiver. You can draw fancy diagrams of temperature and
humidity for up to 16 wireless sensors.
..... |
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