This project shows how to build a LED holiday tree using a custom made circuit board. The circuit board is made using a Dremel rotary tool and doesn’t require any etching chemicals. You use the Dremel tool to cut a copper into a tree shape and route the two separate PCB sections that will power the LEDs. The LEDs and resistors will be soldered at the surface of the board. The result is pretty nice. Check the construction PDF on the link below.
DIY custom circuit board holiday tree - [Link]
Circuit Board Etching, sponsored by Jameco - [Link]
Back in July 2009, we reviewed Protostack’s ATMEGA8 development kit. The heart of the kit was Protostack’s 28 pin AVR board. This week Protostack released a new version of that board and it includes a whole bunch of improvements. You can read the original review here.
This release is the 3rd one to date and includes the following improvements over the one we previously looked at.
- Addition of power supply block
- ISP-6 interface is now 2×3 pin instead of 1×6 pin
- Addition of a section for double row headers and IDC connectors
- Clearer labeling of power busses
Illuminato board project – it’s an Arduino / Freeduino board that has 42 digital IO’s and 64k code space. All of the schematics and files are over here.
Illuminato board project - [Link]
XBee modems are one of the easiest ways to create a wireless point-to-point or mesh network. They have error correction, are configured with AT commands, come in multiple flavors and can create a wireless serial link out of the box! I wanted to make a wireless Arduino project but all the adapter boards on the market made me unhappy. So I designed what I think is an excellent low-cost adapter board.
An XBee wireless modem adapter - [Link]
Made this in order to test the samples I (again) got from microchip… (coolest guys in the world.. If I ever make something sellable in huge numbers with a microcontroller, it will surely be a PIC :).
A dsPIC33 breakout board - [Link]
This is a USB (universal serial bus) interface board which can be used to connect 8 (parallel) data lines to the USB. The interface comes with a small internal FIFO (384 byte Tx, 128 bytes Rx) and 4 handshake lines which make it suitable for interfacing microcontroller designs to the USB.
It can, also be used as simple 8bit IO when the so-called “bitbang mode” is enabled. Note. however, that in this mode, the bits will not come out in a constant bitrate but in chunks of 64 bytes with specified baud rate followed by a delay.
USB 8bit Interface Board – [Link]
This looks like a nice developmental board for programming an ATmega8. The website has some sample programs and the Eagle files so you can make your own. [via]
I made the board using my photo etching technique, and as you can see the results are great. The dev board has 17 I/O lines that are connected to a 17 pin header. On the board there is a 2 color LED tied to PortC pin 1 and 2. On PortC pin 0 there is a PNP transistor that controls the output for a buzzer.
ATmega8 Development Board – [Link]