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AT89C2051/4051stepper Motor Interface - M1 is a stepper taken
from an old disk drive. There are five pins, i.e., common, coil 1, 2, 3
and 4. Resistance measured between common pin and each coil is about 75
Ohms. Driving current for each coil is then needed about 60mA at +5V
supply. .... [Wichit Sirichote, kswichit@kmitl.ac.th is designer] |
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AT90S8515 Experimenter Board - (electronic circuit added 4/05)
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Atmel 8051 Flash Based MicroController Programmer - The Atmel
Flash devices are ideal for developing, since they can be reprogrammed
easy and fast. If you need more code space for your application,
particularly for developing 89Cxx projects with C language. Atmel offers a
broad range of microcontrollers based on the 8051 architecture, with
on-chip Flash program memory..... |
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ATMEL 89 Series Flash MicroController Programmer Ver 2.0 - This
programmer was designed in view of to be flexible, economical and easy to
built, the programmer hardware utilizes the standard TTL series parts and
no special components are used. The programmer is interfaced with the PC
parallel port and there is no special requirement for the PC parallel
port, so the older computers can also be used with this programmer.....
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ATMEL 89C Series Flash Microcontroller Programmer Ver 1.1 - Build your own
flexible & easy to built Atmel 89C series flash programmer…. [M Asim Khan,
asimkhan@sat.net.pk] |
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Atmel 89C2051 In-Circuit Programmer Schematic - (electronic circuit added
4/05) |
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Atmel 89C2051 Prototype Board - This single sided proto board provides an
economical solution for developing and testing the projects around Atmel 20 pin series
u-controllers (89Cx051 & AVR)….(electronic circuit added 4/05) |
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Atmel AVR & 8051 Series Isp Programmer - (electronic circuit added 4/05)
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Audio Distribution Systems - (app note added 5/08) |
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Audio Frequency Digital Noise Generator - When you need to test an audio
circuit with broadband noise, this circuit works great. It uses just three inexpensive
C-MOS ICs that generate a series of output pulses whose widths vary randomly. I
included a level control pot. …. [Designed by David A. Johnson] |
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Auto-Calibration of the PIC12f6xx Internal RC Oscillator to ± 1% - Microchip
Application Note Published 12-May-03 (app note added 2/06) |
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Automatic Calibration of the Wdt Time-Out Period - Microchip Application
Note Published 4-Nov-97 (app note added 2/06) |
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Automatic Gain Control Agc - (electronic circuit added 7/03) |
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Auxiliary Power Applications/ AB-30 - Fairchild Application Notes / (app
note added 6/06) |
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Auxiliary Power Applications/ AB-31 - Fairchild Application Notes / (app
note added 6/06) |
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Avoiding Passive-Component Pitfalls - AN-348 Analog Devices Application
Notes.....[App Note]The Wrong Passive Component Can Derail Even Best Op Amp or
Data Converter. Here Are Some Basic Traps to Watch For. |
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AVR (AT90S2313) composite PAL colour bar generator - (electronic design
added 02/03/04) |
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AVR 2x16 LCD & 4x4 keypad driver - A very simple circuit to experiment with
AT90S2313, 2x16 LCD display and 4x4 keypad. The clock based on 4 MHz crystal, but you
can use anyone crystal between 1-4 MHz. The keys with the name "A", "B"....."F" are
typed to the LCD with numbers 10-16. Because the AVR have only 15 I/O pins we are
working the LCD display with 4-bit databus. The 4 resistors (10K) are to protect the
AVR from the shortcuts as the coloumn of the keypad is change.....(circuits added
05/09) |
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AVR 323 Board - schematic for an ATMega323 boards ( Mega is pin compatible
with AT90S8535) The main interface to this board is RS232 (added 6/06)
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AVR 8 & 20 pin programming adapter - (schematic / circuit added 6/07)
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AVR AT90S2313 Composite Pal Colour Bar Generator - (electronic circuit added
4/05) |
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AVR ATMega8 board for PLL MC145170 - This board allow to manage a FM
transmitter including a Phase Locked Loop (PLL)on a serial bus (SPI) like a MC145170.
A current frequency is memorized in EEPROM to configure PLL at power up. Three
auxiliairy frequencies are available for maintenance function and/or HF adjust. A
local interface include 4 keys and a LCD display enable to modify transmitter
parameters. This board can be completely drived from a serial link RS232 (19200
Bds,8b data,2b stop, no parity). A temperature sensor enable to control working
temperature and 2 analog input are used for HF power measure (Forward and Reflected).
Information about TOS protection activation is processed by this board to inform user
(local and remote) on a TOS Alarm. ….(electronic schematic added 11/08) |
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AVR based oscilloscope - A mega32 based low speed oscilloscope. It can be
used to measure signals up to 5 kHz. The input voltage range can be up to 24V AC or
30V DC.….(Circuit design added 03/09) |
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AVR Based Serial Port IR Receiver - (electronic circuit added 7/03)
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