MHVBoard on Inferno Embedded

R2 Assembly Instructions

Sat, 28 Dec 2013 11:56:59 +0000

MHVBoard R2 Assembly Instructions

Tools

You will need the following tools to assemble your MHVBoard:

Soldering iron with a fine tip (25W will do)
Solder (the PCB is ROHS compliant if you want to use lead-free solder, but lead based solder is easier to work with)
Needle-nose pliers
Side cutters
Multimeter
Blu-tack

PCB

Carefully inspect both sides of your PCB for solder dags and scratches. If there are scratches on your board, use a multimeter set to continuity and refer to the board layout to ensure that no traces have been damaged.

Useful Information

Sat, 28 Dec 2013 06:45:11 +0000

JP4 pinout

The right angle connector has the following pinout (starting from the pin near JP1):

JP4 Pin	Arduino Shield Pin	Description
1	0	D0, Serial RX, PCINT16
2	1	D1, Serial TX, PCINT17
3	2	D2, INT0, PCINT18
4	3, PWM	D3, OC2B, INT1, PCINT19
5	4	D4, XCK, T0, PCINT20
6	5	D5, OC0B, T1, PCINT21
7	6, PWM	D6, OC0A, AIN0, PCINT22
8	7	D7, AIN1, PCINT23
9	8	B0, CLKO, ICP1, PCINT0
10	9, PWM	B1, OC1A, PCINT1
11	10, PWM	B2, SPI Slave Select, OC1B, PCINT2
12	11, PWM	B3, SPI MOSI, OC2A, PCINT3
13	12	B4, SPI MISO, PCINT4
14	13	B5, SPI SCK, PCINT5
15	Ground	Ground
16	Aref	AREF, coupled via 100uH inductor and 100nF capactor
17	Analog 0	C0, ADC0, PCINT8
18	Analog 1	C1, ADC1, PCINT9
19	Analog 2	C2, ADC2, PCINT10
20	Analog 3	C3, ADC3, PCINT11
21	Analog 4	C4, ADC4, SDA, PCINT12
22	Analog 5	C5, ADC5, SCL, PCINT13
23	Vin	Vin (from the DC jack)
24	+5V	+5V
25	Reset	Reset (active low), C6, PCINT14

Solder Jumpers

On the underside of the board are a number of solder jumpers.

Troubleshooting

Sat, 28 Dec 2013 06:41:02 +0000

Here are some common problems you might encounter when using your MHVBoard.

The MHVboard R2 does not appear as a USB device for uploading.

Connect the MHVboard to your computer with a USB cable. Make sure the upload jumper is installed on JP6, set the power jumper (JP5) to USB by placing the jumper over the pins 1 and 2 (pin 1 is near the resistors), then press the reset button. LED1 on Pin13 (placed between the USB connector and the power regulator) should blink three times and then turn off) and the MHVboard should be placed in programming mode and your computer should acknowledge that the USB device has been connected.

Getting Started in the Arduino Environment

Sat, 28 Dec 2013 06:31:03 +0000

Getting Started with the MHVBoard in the Arduino Environment

The MHVBoard will work within the Arduino environment.

Install the Arduino Environment version 1.0
Download the MHVBoard enhancements at the bottom of this page and extract it over the top of your Arduino installation
If you are running Windows, you will need to download the USBasp drivers, available from the author of USBasp. Linux & Mac machines do not need additional drivers.
If you are running a 64 bit version of Windows, you will need to sign the drivers before installation:

Download Driver Signature Enforcement Overrider
Extract the USBasp drivers
Run Driver Signature Enforcement Overrider as Administrator
Put your computer into Test Mode (this allows self-signed drivers to run)
Sign all the DLL and SYS files in the extracted USBasp driver package
Optionally, remove the watermarks from your system (Test Mode will show “test mode” in the bottom right of your desktop)

(R2 boards only) Connect the “Upload” jumper on the MHVBoard, move the power jumper to “USB” and connect it to your computer
Press the reset button on the MHVBoard to put it into Upload mode. The LED will flicker briefly to indicate that it has entered the bootloader
If you are running Windows, the first time you do this, a new device will be detected. Point the driver installer at the drivers you extracted/signed earlier.
Launch the Arduino Environment
Write/load your sketch
Choose “MHVBoard” from the Boards menu
Upload your sketch, your sketch will run automatically after uploading
To re-enter the bootloader press reset again. As before, the LED will flicker to show it is ready for another upload

R7 Assembly Instructions

Sat, 28 Dec 2013 03:34:29 +0000

Tools

You will need the following tools to assemble your MHVBoard:

Soldering iron with a fine tip (25W will do)
Solder (the PCB is ROHS compliant if you want to use lead-free solder, but lead based solder is easier to work with)
Needle-nose pliers
Side cutters
Multimeter
Blutac

Packing List

MHVBoard R7 Packing ListItem	Quantity	Location
10uF electrolytic capacitor	2	C1, C2
22pF ceramic capacitor	2	C3, C4
100nF ceramic capacitor	2	C5, C6
10uF tantalum capacitor	1	C7
3.6V zener diode	2	D1, D2
1N4001 silicon rectifier diode	1	D3
1N5817 Schottky diode	1	JP5 (not on silkscreen)
28 pin narrow DIP IC socket	1	IC1
Atmega328P	1	IC1
7805 5V voltage regulator	1	IC2
AMS1117 3.3V voltage regulator	1	IC3
1x8 female pin header	2	JP1, JP2
1x6 female pin header	2	JP3, JP8
1x4 pin header	1	JP7
2x3 pin header	1	ICSP (JP9)
1x25 right angle pin header	1	JP4
10uH axial inductor	1	L1
20MHz HC49/S crystal	1	Q1
68Ohm resistor	2	R1, R2
1MOhm resistor	1	R3
1.5KOhm resistor	1	R4
1k resistor	2	R5, R6
3mm LED (random colours)	2	LED1, LED2
6x6mm pushbutton switch	1	S1
5 pin microUSB connector	1	X1
2.1mm DC jack	1	J1
micro USB cable	1
MHVBoard R7 PCB	1

Once you have confirmed that you have all the components, you are ready to begin construction.

mhvboard 7

Fri, 27 Dec 2013 03:45:29 +0000

Remove upload jumper
- Reroute traces away from the crystal
- Fix silkscreen for Arduino analog input

Downloads

USBaspLoader.2010-07-27-mhvboard.zip (175.1 KB)
MHVBoardR7.7z (187.3 KB)