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AVR LCD Thermometer LM35 - The LM35 of National Semiconductors
that is used in this project is a precision centigrade temperature sensor,
which has an analog output voltage. It has a range of -55ºC to +150ºC and
a accuracy of ±0.5ºC . The output voltage is 10mV/ºC ….(design added
11/08) |
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AVR microcontroller makes improved motor-controller - 17-Oct-02
Issue of EDN The circuit in Figure 1 provides a novel method of
reading the pulse train using an Atmel (www.atmel.com] AVR processor, from
a typical radio-controlled receiver, and to determine the velocity of a
motor..... [Design Idea by Anthony Di Tommaso, Cranberry Township, PA, and
George Simonoff, Petersburg, OH] |
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AVR PAL colour bar generator - I start this project 3 weeks ago,
because I was wonder " is that possible, some AVR MCU to create simple
colour bars? " At the beginning I believed that its easy. So, I ask some
people who they knew more about PAL composite video signal...... [Circuit
by Vassilis Serasidis] |
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AVR PC Stepper Motor Driver - With this circuit you can control two
unipolair stepper motors in full step mode via the RS232 serial port of your PC. A
terminal program such as Hyperterminal can be used to control the stepper motors. The
stepper motors can be driven one at a time. # Drives two unipolair stepper motors in
full step mode # Accepts commands via the serial port of your PC. # Can be used with
any OS that has a standard terminal program such as Hyperterminal. # Drives stepper
motors up to 24V, 500mA # Power supply.....12-24 VDC ….(design added 11/08)
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AVR PC Thermometer - With this project you can show the temperature on you
PC. This thermometer plugs on any free serial port. It gives temperature
readings accurate to 0.5°C with no calibration.The project consists of the AVR 2313
Project board and the DS1621 Thermometer board and software for the PC. ….(electronic
schematic added 11/08) |
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AVR Programmer - This simple AVR Programmer will allow you to painlessly
transfer hex program to most ATMEL AVR microcontrollers without sacrificing your
budget and time. It is more reliable than most other simple AVR programmers available
out there and can be built in very short amount of time. ….(design added 11/08)
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AVR Programmer (#268) - The ATMEL AVR programmer works with the Windows
program "Ponyprog" which works under 95, 98, XP,.....and can be found at http://www.lancos.com/prog.html
On board the AVRs that can be programmed are those in the schematic. For other members
of AVR family or the rest programmable ICs that Ponyprog can program, there is the J1
connector (CON10) which allows expanding the programmer's hardware. See Ponyprog's
site for other's ICs Ponyprog circuits. The JUMP1 jumper is there to connect the
crystal's circuitry to the 8- pin AVRs or to disconnect it. Some AVRs have internal RC
oscillator and an external XTAL is not allowed or needed. ….(electronic schematic
added 11/08) |
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AVR Programmer (#449) - This is a ery simple serial ISP progammer for AVR
microprocessors. The schema can be found here. It is Sample Electronic Programmer
compatibile and can be used with Bascom, WinAVR etc. Previously I used programmer with
only 330 ohm resistors in series with MOSI, RESET and SCK. It worked quite good, but
in new version I used buffers to improve separation between LTP and AVR. In plans full
galvanic isolation using optocouplers. ….(design added 11/08) |
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AVR Thermometer TCN77 - The TC77 is a serially accessible digital
temperature sensor. Temperature data is converted from the internal thermal sensing
element and made available at anytime as a 13-bit two’s compliment digital word.
Communication with the TC77 is accomplished via a SPI and MICROWIRE compatible
interface. It has a 12-bit plus sign temperature resolution of 0.0625°C per Least
Significant Bit (LSb). The TC77 offers a temperature accuracy of ±1.0°C (max.) over
the temperature range of +25°C to +65°C. When operating, the TC77 consumes only 250 ìA
(typ.). The TC77’s Configuration register can be used to activate the low power
Shutdown mode, which has a current consumption of only 0.1 uA (typ.). ….(electronic
schematic added 11/08) |
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AVR-Based Serial Port IR Receiver - (electronic circuit added 4/05)
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AT89C2051 Serial Coms to LED Driver - (electronic circuit added 4/05)
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AT89C2051/4051 Driving Dot Led - A basic circuit of the 89C2051 shown here
can be made easily using point-to-point soldering with a universal PCB. Use an
ordinary 20-pin socket, do not use a circle-pin socket. D1 is a small dot LED. U2 can
be either 7805 or 78L05. U3 is optional for correcting any polarity DC adapter.
Without the 2051 chip [Wichit Sirichote, kswichit@kmitl.ac.th is designer0 |
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AT89C2051/4051 Easy
Downloader - Build your own a personal writer forprogramming HEX code into
Flash based microcontroller AT89C2051(2k) andAT89C4051(4k). Simple hardware and Easy
use software in DOS and Windowversion. Single-side and double side PCB files
included.sourcecode with sdcc version!..... [Wichit Sirichote, kswichit@kmitl.ac.th is
designer0 |
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AT89C2051/4051scanning 7 Segment Display and Keypad - Since the output
buffer of P1 can sink 20mA (each output pin, but maximum IOL for all outputs was
limited at 80mA), thus we can use P1 to drive LED display directly. As shown in the
circuit, Two common-anode 7-segment LEDs are connected to P1 with 180 Ohms current
limiting resistor. Each segment of two LED...Wichit Sirichote, kswichit@kmitl.ac.th is
designer] |
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