This digital clock displays the time in binary format. Binary clock s have become very popular recently, many hobbyists create their own version of it and they are even available commercially. To decode the time you need to be familiar with the binary number system and have to decode it pretty fast, before the time changes :-).
It is based on the popular PIC 16F628A microcontroller, row / column addressing was done to allow the microcontroller to control all of the LEDs.
Binary Clock inside Power Supply Brick – [Link]
LCD displays of the 2×16 variety are a good way of getting feedback from your Arduino project. If you want a more enhanced visual experience, a thin-film transistor (TFT) LCD is the superior way to go. This tutorial by Tronixstuff describes a way use the the 4D Systems 1.44″ TFT serial interface LCD with Arduino. [via]
Arduino and TFT LCD tutorial – [Link]
robots shares his design for a reflow oven controller: [via]
I have bought [an] oven. The main reason for this was to bake some PCBs. As with every reflow oven, this one needs temperature control as well.
I have baked several pcb without problem with unmodified oven. But that might be luck, as the temperature profile is nowhere near perfect.
I have therefore decided to make some simple temp controller to take care of the whole soldering process. As my oven features fan, I will probably want to control it as well. The controller should not to need any special programmer (mega can by programmed with BP) and the board should be etch-able at home.
Reflow oven controller – [Link]
For his USC Rocket Propulsion Lab, Chris Fenton designed this project using a Picaxe 18X microcontroller which accepts a GPS NMEA data stream, pulls out the altitude and logs it to a 24LC512 external EEPROM. Upon recovery the data is then read from the EEPROM. Source code for the Picaxe and hand drawn schematic for this hasty project are provided. [via]
Model rocket GPS altimeter using Picaxe 18X – [Link]
XESS introduces their new XuLA-200 breakout board. The XuLA Board packs a 200,000-gate FPGA and a supervisory microcontroller into a 2″ x 1″ footprint (51 mm x 25 mm). XESS is committed to a completely open source design for this board which features a Xilinx XC3S200A Spartan 3A FPGA with 8 MByte SDRAM, 2 Mbit Flash, 3.3 & 1.2V regulators, a 12 MHz oscillator and 40-pin interface. Alongside the FPGA is a PIC 18F14K50 micro, USB 2.0 port and auxiliary JTAG port.
The board works with the XSTOOLs software, XILINX ISE and WebPACK, iMPACT and ChipScope (requires Xilinx JTAG cable).
XESS XuLA-200 FPGA/uC board – [Link]
Makerdino shared his light controlled screamer with 555 chips. [via]
Here’s a fun project to make with the 555 chip. It can be built as a stand alone circuit or you can put it inside a doll, toy or whatever! I’m entering this one in the 555 Contest in the Art category.
Light controlled screamer with 555s – [Link]
Tim writes – [via]
This is a free (open source) Python script for creating feeder sprockets for e.g. perforated tape or film advance. I wrote it for myself to generate SMD tape-and-reel feed sprockets, but it might also be useful for making replacement sprockets for 8/16/35mm film, microfilm and paper-tape systems whose original reader hardware no longer exists or is difficult to find replacement parts for. The output is a .DXF template suitable for laser cutting, 3D printing or CNC machining. “Documentation” below, but it should be pretty self-explanatory. It should work with any modern version of Python (tested on 2.6).
Tape Sprocket Creator – [Link]