EVBavr04 is a development board designer for the hobbyist and engineers who want to quickly prototype their system based on AVR microcontrollers from Atmel. Developer has access to all pins of the micro, which are brought to the header (pin connectors) and labeled accordingly. Depending upon the board`s configuration (listed versions) some or all of the following components are found on the board: thermometer DS1820, potentiometer, relay, buzzer, RTC (real time clock), 1-wire connector, I2C connector, 7-segment LEDs and LCD display (2x16). The pin headers provided allow easy access to all these components. In addition, there are eight micro-switches and eight diodes which could be connected to any of the pin connectors or additional components, which may be placed on the large, adjacent prototype area. The power circuitry on board (bridge, voltage regulator) eliminates the need for an external regulated power supply.
This board comes with the several examples of the C code routines (source from), to facilitate testing and quick development in using the board`s resources.
Supported microcontrollers
|
ATmega8 |
ATmega48/88/168 |
| FLASH |
8 KB |
4/8/16 KB |
| SRAM |
1 KB |
512/1K/1K B |
| EEPROM |
512 B |
256/512/512 B |
| Peripherals |
Two 8-bit Timer/Counters, 16-bit Timer/Counter, three PWM channels, 10-bit ADC, TWI, USART, SPI, Programmable Watchdog Timer with On-chip oscillator. |
Two 8-bit Timer/Counters, 16-bit Timer/Counter, six PWM channels, 10-bit ADC, TWI, USART, SPI, Programmable Watchdog Timer with On-chip oscillator. |
| Supply Voltage |
2.7V - 5.5V ATmega8L, 4.5-5.5V ATmega8
1.8-5.5V ATmega48V/88V/168V, 2.7-5.5V Atmega48/88/168
|
| Clock Frequency |
| ATmega8 |
ATmega48/88/168
|
ATmega48V/88V/168V |
| 0-8 MHz ver.8L |
0-10 MHz @ 2.7-5.5V
|
0-4 MHz @1.8-5.5V
|
| 0-16 MHz ver.8 |
0-20 MHz @ 4.5-5.5 V |
0-10 MHz @ 2.7-5.5 V |
|
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Temperature Range
|
form - 40 C to 85 C
|
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Package
|
28 Pin PDIP
|
Available version
The set EVBavr04 is sold in the following version:
- procesor ATmega8 (can be exchanged)
- all connectors
- four 7-segment LEDs,
- diodes and switches
- relay
- buzzer
- two potentiometers
- DS1820 thermometer
- DS1307 Real Time Clock and 3.6V accumulator
You can also buy the following accesories:
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LCD (blue, green with lighting or not)
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10 cables (for connect the pins)
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external clock (8MHz)
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ISPcable II or ISPcable III programmer
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JTAGcable II or JTAGcable III programmer/debugger
Technical features
Features:
- Prototype area
- Additional components connector
-
LEDs and micro-switches
-
Potentiometer
-
DS1820 thermometer
-
RESET switch and power LED
-
LCD display 2x16 (optionally)
-
Four 7-segment LEDs
-
Buzzer
-
1-Wire connector
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I2C connector
-
RS232 connector
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LM317 regulator allownig to connect unstabilized voltage
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Board supply on-switch
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Input of supply voltage with rectifier bridge allowing supply with voltage DC lub AC
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Relay`s connector enclosed to the relay on the board
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programmer connector
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Led out and doubled processor ports
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Socket for processors ATmega8 and ATmega48/88/168
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LCD display connector allowing to link different types of displays
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3.6 V accumulator
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DS1307 Real Time Clock
Power supply for the board
-
The board shoul be supplied from external supply with voltage 7..12V AC, or 9..15V DC, using a standard plug with bolt diameter 2.1mm placed in the supply socket.
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Stabilized voltage Vdd is accessible on the connectors of the board extentions.
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There are two jumpers placed on the board: SUPPLY and 3V3. The closure of the 3V3 jumper results in all the circuits being supplied with 3.3V voltage (it can be regulated by 3V3 potentiometer from 1.8V to 3.3V), by the open jumper the voltage will be 5V.
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SUPPLY jumper gives the opportunity of connecting voltage omiting the circuits of the bridge and the regulator.
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