Evaluation Boards • Flash MC Experimentalboard II •
The Flash MC Experimenting Board II is an ideal platform for all developments in conjunction with the 'big' Atmel Flash microcontrollers (AT89C51/AT89C52/AT89C55/AT89S8252). It is not only recommendable for starters but also very much recommendable for the advanced developer due to the fact that it offers an universal and standardized platform which enables to bring almost anything thinkable into reality.
All basic parts of a Flash microcontroller applikation are located directly on the Flash MC Experimenting Board II. To these belong the voltage regulation and stabilisation, the oscillator, the POR-wiring (Power On -> Reset), a reset switch, a 8x DIP switch for all kinds of configuration issues, pin rows for solder connections and lots more.
Ready extension modules with schematics and layouts
Through two so-called extension ports you can attach all kinds of extension modules. Both extension ports offer in addition to the eight I/O lines of the port, power supply, the serial interface as well as other lines.
Extension module port information.
Following a list of extension modules with schematics and layouts:
- Simple display module...
- 8 digit 7 segment display module...
- Relay module...
- RAM module...
- RS 232 module...
Schematic and Layout
For the schematic and layout plans you need the highly recommended schematic and layout editor EAGLE. A free english version can be downloaded at http://www.cadsoft.de/freeware.htm.
Flash MC Experimentalboard II Schematic and layout
File size: around 26 KByte
Manual: How to use and construct the devices
Manual: How to use and construct the devices
File size: around 1.8 MByte
Schematic as a GIF image
On the first view the plan might apear a little complicated, but it really isn't. The upper left part represents the voltage regulation and stabilisation. The switches S1-1 to S1-6 are implanted with a simple 6x DIP switch. On the upper right you can see the pins rows that are located left and right of the MC and which simply offer his pins 1:1 for a solder connection. The drawn joints EP 1-0 to EP 1-15 and EP 3-0 to EP 3-15 are the extension ports. I recommend to take a close look at the circuit layers, then everything should be easily understandable.
Power rating of the voltage regulator
We recommend to equip the voltage regulator with a cooler. The circuit itself needs only a few milliampere (depending on the used microcontroller and the frequency of tact), but additional modules can be supplied with energy from the voltage regulator of the Experimenting Board through the extension ports.
The layout is prepared for a V4330N cooler and also the kits and assembled devices offered by Batronix are equipped with this cooler. The V4330N does have a thermic resistance of only 12 Kelvin (Degree) per watt and offers this way a good porpotion between size and cooling ability at a low price.
