NB2AS Microcontroller Board
The NB2AS is a physical computing development system that is
compatible with the Arduino software environment (with the Sanguino
add-ons). For system development a variety of peripheral modules are
available. The
NB2AS datasheet
contains the
specification, schematics and bill-of-materials.
The DAC and RTC libraries are released. The microSD library is
functional but needs documentation. The microSD library has been
tested with a Transcend 1GB, Sandisk 2GB and Sandisk 4GB HC card.
Features
- Replaceable and upgradeable CPU
- Compatible with the Arduino development tools (with Sanguino add-ons).
- ATmega644P running at 12MHz with a Vcc of 3.3V.
- 3.55" x 2.15". Fits in the "standard" Altoids tin.
- SMD land patterns designed for hand assembly.
- Atmega I/O, DAC and RTC connections are wired to a single header.
Application boards can be mounted parallel using vertical
connectors, co-planar using right-angle connectors or remotely
using a cable.
- microSD Card
- Series MOSFET enables power to be cycled on the microSD card.
This enables the microSD to be properly reset.
- Pull-ups on all pins.
- Card-detect output wired to an I/O line.
- Tested with the the following cards -- Transcend 1GB, Sandisk 2GB, Sandisk 4GB HC.
- RTC Features
- Real-Time Clock (RTC) counts Seconds,
Minutes, Hours, Day, Date, Month, and Year
with Leap-Year Compensation Valid Up to
2100
- Two Time-of-Day Alarms
- Programmable Square-Wave Output
- Backup power from a CR1220 coin cell.
- I2C Serial Interface
- DAC Features
- Two channels, 12 bits per channel.
- Reference -- 1.225V, ±0.1% (initial accuracy), 100ppm/°C max drift,
- SPI Interface
- The board can be built with either a USB interface
or with a six pin header for use with an USB to serial cable.
The USB interface circuitry includes transient
suppression.
- ICSP port (3.3V levels)
- A/D reference supply filtered per Atmel specification.
- Reset circuit per Atmel specification.
- Power supply is jumpered between either an LDO or an external
3.3V supply. The LDO input is diode or'ed from a wall adapter or
the USB 5V supply.
- Accessories include a prototyping
board NB2A-PB1
, a terminal
board NB2A-TB1
and a Li-Ion
battery charger (Sep-2010).
NB2AS Pricing
Assembled boards are assembled to order and typically ship within one to two business days.
| Part Number
| Description
| Price | Qty
|
|
| NB2AS-KIT4
| datasheet
| NB2AS-KIT2 w/o the DAC and reference
| 50.00USD | | 1
|
|
|
| NB2AS-KIT2
| datasheet
| NB2AS, TH Kit, USB Header, uSD components
| 60.00USD | | 1
|
|
|
| NB2AS-KIT3
| datasheet
| NB2AS, TH + SMD Kit
| 65.00USD | | 1
|
|
|
| NB2AS
| datasheet
| NB2AS Assembled and Tested (USB Interface)
| 80.00USD | | 1
|
|
|
Accessories
The FTDI USB to Serial Cable
TTL-232R-3V3 is required to
program the NB2AS built with NB2A-KIT2. NB2AS-KIT3 amd NB2AS-KIT4
include the surface mount components to build the on-board USB
interface.
| Part Number
| Description
| Price | Qty
|
|
| FTDI-TTL-232R-3V3
| datasheet
| USB to RS232 (3.3V TTL)
| 20.00USD | | 1
|
|
|
NB2A-KIT4 Component List
| Item Number
| Quantity
| Description
|
|
| 1
| 1
| connector, battery, CR1220
|
| 2
| 6
| capacitor, ceramic, 0.1uF, 10%, 50V, X7R
|
| 3
| 2
| capacitor, ceramic, 20pF
|
| 4
| 2
| capacitor, Nichicon UPW1E100MDD
|
| 5
| 1
| capacitor, ceramic, 0.1uF, 16V, 0805
|
|
| 6
| 1
| diode, 1N4148
|
| 7
| 1
| diode, dual, On-Semi MBR1545CTG
|
| 8
| 1
| LED, T1, Green
|
| 9
| 2
| diode, BAT41
|
| 10
| 1
| fuse, 0.5A 1812
|
|
| 11
| 1
| header, RA, 17x2, 100mils
|
| 12
| 2
| header, 3x1, 100mils
|
| 13
| 1
| header, 6x1, 100mils
|
| 14
| 1
| header, 3x2, 100mils
|
| 15
| 1
| power jack, 2.1mm
|
|
| 16
| 1
| inductor, 10uH, 10%
|
| 17
| 1
| FET, P, -20V, 3.2A
|
| 18
| 1
| resistor, 10K, 1/4W, 1%
|
| 19
| 1
| resistor, 374 Ohm, 1/8W, 1%
|
| 20
| 2
| resistor, 4.7K, 1/8W, 1%
|
|
| 21
| 1
| resistor, 10K, 0805. 1%
|
| 22
| 3
| resistor network, 47K, 1/8W, 1206x2 Concave
|
| 23
| 1
| resistor, 47.5K, 0805, 1%
|
| 24
| 1
| pushbutton
|
| 25
| 1
| ATmega644P-20PU, 64K/4K/2K, 20MHz
|
|
| 26
| 1
| voltage regulator, 3.3V, 800mA, TO-220
|
| 27
| 1
| IC, RTC, DS1337+
|
| 28
| 1
| Molex_502702-0891
|
| 29
| 1
| crystal, 12MHz, 20pF, HC49US
|
| 30
| 1
| crystal, 32.768KHz, 6pF, 2x6mm package
|
|
| 31
| 1
| DIP Socket, 8 Pin, 300mil centers
|
| 32
| 1
| DIP Socket, 40 Pin, 600mil centers
|
| 33
| 2
| Shunt with handle
|
| 34
| 1
| battery, coin cell, CR1220
|
| 35
| 1
| wiblock_NB2AS-PCB
|
|
NB2AS-KIT2 Component List
| Item Number
| Quantity
| Description
|
|
| 1
| 1
| connector, battery, CR1220
|
| 2
| 7
| capacitor, ceramic, 0.1uF, 10%, 50V, X7R
|
| 3
| 2
| capacitor, ceramic, 20pF
|
| 4
| 2
| capacitor, Nichicon UPW1E100MDD
|
| 5
| 1
| capacitor, ceramic, 0.1uF, 16V, 0805
|
|
| 6
| 1
| diode, 1N4148
|
| 7
| 1
| diode, dual, On-Semi MBR1545CTG
|
| 8
| 1
| LED, T1, Green
|
| 9
| 2
| diode, BAT41
|
| 10
| 1
| fuse, 0.5A 1812
|
|
| 11
| 1
| header, RA, 17x2, 100mils
|
| 12
| 2
| header, 3x1, 100mils
|
| 13
| 1
| header, 6x1, 100mils
|
| 14
| 1
| header, 3x2, 100mils
|
| 15
| 1
| power jack, 2.1mm
|
|
| 16
| 1
| inductor, 10uH, 10%
|
| 17
| 1
| FET, P, -20V, 3.2A
|
| 18
| 1
| resistor, 10K, 1/4W, 1%
|
| 19
| 1
| resistor, 374 Ohm, 1/8W, 1%
|
| 20
| 1
| resistor, 2.1K, 1/8W, 1%
|
|
| 21
| 2
| resistor, 4.7K, 1/8W, 1%
|
| 22
| 1
| resistor, 10K, 0805. 1%
|
| 23
| 3
| resistor network, 47K, 1/8W, 1206x2 Concave
|
| 24
| 2
| resistor, 47.5K, 0805, 1%
|
| 25
| 1
| pushbutton
|
|
| 26
| 1
| ATmega644P-20PU, 64K/4K/2K, 20MHz
|
| 27
| 1
| voltage regulator, 3.3V, 800mA, TO-220
|
| 28
| 1
| IC, DAC, TLV5618, 2ch, 12bit, DIP-8
|
| 29
| 1
| IC, REF, 1.225V, 0.1%, TO-92
|
| 30
| 1
| IC, RTC, DS1337+
|
|
| 31
| 1
| Molex_502702-0891
|
| 32
| 1
| crystal, 12MHz, 20pF, HC49US
|
| 33
| 1
| crystal, 32.768KHz, 6pF, 2x6mm package
|
| 34
| 2
| DIP Socket, 8 Pin, 300mil centers
|
| 35
| 1
| DIP Socket, 40 Pin, 600mil centers
|
|
| 36
| 2
| Shunt with handle
|
| 37
| 1
| battery, coin cell, CR1220
|
| 38
| 1
| wiblock_NB2AS-PCB
|
|
NB2A-KIT3 Component List
| Item Number
| Quantity
| Description
|
|
| 1
| 1
| connector, battery, CR1220
|
| 2
| 7
| capacitor, ceramic, 0.1uF, 10%, 50V, X7R
|
| 3
| 2
| capacitor, ceramic, 20pF
|
| 4
| 2
| capacitor, Nichicon UPW1E100MDD
|
| 5
| 4
| capacitor, ceramic, 0.1uF, 16V, 0805
|
|
| 6
| 1
| diode, 1N4148
|
| 7
| 1
| diode, dual, On-Semi MBR1545CTG
|
| 8
| 1
| LED, T1, Green
|
| 9
| 2
| diode, BAT41
|
| 10
| 1
| fuse, 0.5A 1812
|
|
| 11
| 1
| header, RA, 17x2, 100mils
|
| 12
| 2
| header, 3x1, 100mils
|
| 13
| 1
| header, 3x2, 100mils
|
| 14
| 1
| power jack, 2.1mm
|
| 15
| 1
| Molex_67503-1020
|
|
| 16
| 1
| inductor, 10uH, 10%
|
| 17
| 1
| FET, P, -20V, 3.2A
|
| 18
| 1
| resistor, 10K, 1/4W, 1%
|
| 19
| 1
| resistor, 374 Ohm, 1/8W, 1%
|
| 20
| 1
| resistor, 2.1K, 1/8W, 1%
|
|
| 21
| 2
| resistor, 4.7K, 1/8W, 1%
|
| 22
| 3
| resistor, 10K, 0805. 1%
|
| 23
| 3
| resistor network, 47K, 1/8W, 1206x2 Concave
|
| 24
| 2
| resistor, 47.5K, 0805, 1%
|
| 25
| 1
| resistor, 4.7K, 0805, 1%
|
|
| 26
| 1
| pushbutton
|
| 27
| 1
| ATmega644P-20PU, 64K/4K/2K, 20MHz
|
| 28
| 1
| voltage regulator, 3.3V, 800mA, TO-220
|
| 29
| 1
| FTDI_FT232RL
|
| 30
| 1
| IC, DAC, TLV5618, 2ch, 12bit, DIP-8
|
|
| 31
| 1
| IC, REF, 1.225V, 0.1%, TO-92
|
| 32
| 1
| IC, RTC, DS1337+
|
| 33
| 1
| Molex_502702-0891
|
| 34
| 1
| TI_SN65220DBV
|
| 35
| 1
| crystal, 12MHz, 20pF, HC49US
|
|
| 36
| 1
| crystal, 32.768KHz, 6pF, 2x6mm package
|
| 37
| 2
| DIP Socket, 8 Pin, 300mil centers
|
| 38
| 1
| DIP Socket, 40 Pin, 600mil centers
|
| 39
| 2
| Shunt with handle
|
| 40
| 1
| battery, coin cell, CR1220
|
|
| 41
| 1
| wiblock_NB2AS-PCB
|
|
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