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14 Apr 2011

Vane writes:

Today i created pcb for Lithium Ion / Lithium Polymer USB Battery Charger with MAX1811, and designed with eagle pcb software.

About Max1811

The MAX1811 is a single-cell lithium-ion (Li+) battery charger that can be powered directly from a USB port or from an external supply up to 6.5V. It has a 0.5% overall battery regulation voltage accuracy to allow maximum utilization of the battery capacity.

The charger uses an internal FET to deliver up to 500mA charging current to the battery. The device can be configured for either a 4.1V or 4.2V battery. The MAX1811 is available in a small 1.4W thermally enhanced 8-pin SO package.

PCB for USB Charger with MAX1811 – [Link]


13 Apr 2011

krishi shows how-to use the Arduino as an HID MIDI device. [via]

MIDI over USB using Arduino Uno – [Link]

12 Apr 2011

womai writes:

Below you see the specifications of the instruments. If you are familiar with oscilloscopes you will see that the DPScope has pretty much all the features you’d expect from a decent lower-end instrument.

If you aren’t a number freak, feel free to skip this page as fast as you can :-)

On the next page I’ll discuss a few of the key specifications.

DPScope – Build Your Own USB/PC-Based Oscilloscope – [Link]

12 Apr 2011

dangerousprototypes.com writes:

This is a USB and serial backpack for simple HD44780 character LCD screens. It has a few nice features that set it apart from the serial-only LCD backpacks at SparkFun and Adafruit:

USB and serial control of characters LCDs
Supported in common software (LCD Smartie) as ‘matrix orbital’ display
Adjust contrast and backlight from software
Couple extra pins for buttons
500mA fuse
USB upgradable

PIC LCD backpack – [Link]

8 Apr 2011

dangerousprototypes.com writes: [via]

We covered Sure’s WIFI web server module previously. This board has a MRF24WB0MB wireless module and a PIC24FJ256GB106 with USB (host and slave) capabilities. As a bonus the board also has a mini-sd connector for storing webpages. At a first glance the board looks very clean and well designed with a nice silkscreen. Cost was $59.90 plus shipping.

Sure electronics WiFi web server module – [Link]

7 Apr 2011

StartUSB for PIC is a small development board from mikroElektronika featuring PIC18F2550 preprogrammed with an USB bootloader. This tutorial describes the complete setup for this board that will let you start your journey into the world of PIC18F microcontrollers.

StartUSB for PIC board - [Link]


1 Apr 2011

radiolocman.com writes:

PIC 18F4550 and 18F2550 are powerful microcontrollers including a full-speed USB V2.0 compliant interface. With these MCU it’s very easy for the hobbyist to design USB devices with very few components. In these pages, I’m describing how to use the CDC firmware from Microchip. It permits to emulate a serial port with a PC running Windows or Linux. It’s also very easy to build HID devices.

Build a USB device with a PIC – [Link]

27 Mar 2011

MichaelZ writes: [via]

While poking around SparkFun’s website I found USB Host Shield which is only marginally interesting unless you are an Arduino fan. But the USB host controller chip is interesting. The MAX3421E is a USB Peripheral/Host Controller with SPI Interface. This is an alternate to the FTDI VNC USB host controllers. It has only one USB port vs the FTDI two but for some applications it maybe the way to go. For example it could be used with a CPLD or FPGA as a USB Host. A SPI master is easy to implement in a CPLD/FPGA (similar to the dual ’595′s example). In VHDL a simple state machine could do all of the register control.

MAX3421E USB peripheral/host controller with SPI interface – [Link]

24 Mar 2011

adafruit.com writes:

We have had a lot of tutorials on electronic parts and Arduino lately, so we wanted to mix it up with some tutorials on the tools we use here every day at Adafruit. We have a very streamlined operation here and a lot of that has to do with the technology we’ve cooked into the business!

This tutorial is for the barcode scanner we use for shipping invoices as part of our custom shipping system. they can ‘talk’ rs-232 serial, ps/2 or USB so they are possible to connect to an embedded system. we have some usb HID interface example code as well for reading data directly from the barcode scanner.

Barcode scanners for a maker business – [Link]

22 Mar 2011

TinyCLR is the newest designer to release a project through Seeed Studio: [via]

FEZ Mini is a tiny board running Microsoft .NET Micro Framework. This means you can write code with much more efficiency using the C# programming language under free Microsoft Visual C# express. The pinout is BasicStamp2 compatible. Includes USB cable. Many libraries are already included like FAT file system on SD cards, threading, UART, SPI, I2C, GPIO, PWM, ADC, DAC and many more.

Available for sale soon here.

FEZ Mini .NET ARM development board – [Link]





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