Wiseduino is an Arduino clone which has real time clock (DS1307) and EEPROM (24LC256) on board.
Wiseduino can be purchased as kit here
. The kit contains the following components:
- PCB (in black);
- ATmega328P micro controller with the Arduino bootloader;
- 28-pin socket for ATmega328P;
- resonator 16MHz;
- DS1307 real time clock chip;
- 24LC256 EEPROM chip;
- crystal 32768Hz;
- CR1220 coin battery;
- coin battery holder;
- 2N2222 transistor;
- 10K resistor (4 pieces);
- 100nF capacitor (4 pieces);
- 40-pin female header;
- 10-pin female header;
- 6-pin male angled header;
- SPDT micro switch;
- 2-pin JST angled power connector;
- power cables: one with 9V battery snap connector, the other with 2-pin JST jack.
To assemble Wiseduino follow these sub-steps.
Start with soldering the IC sockets. Make sure their notches match those on the silkscreen, so the correct orientation of the chips will be easy to identify later, when the chips are inserted.
Solder the battery holder. (photo 2
Solder the power connector, then the 6-pin angled male header (used as FTDI connector).
Place the micro switch on the pads and solder the middle terminal, so that the switch's lever sticks 1mm out of the board. After the micro switch is positioned properly, solder the other 2 terminals. (photo 3
Solder the 4 resistors, placed vertically. They all have the same value (10K), so there is no possibility for error.
Solder the 4 capacitors. As well, they all have the same value (100nF).
Next solder the 16MHz resonator. Its orientation is not important.
Insert the small cylindrical crystal (32768Hz, used by real time clock chip). Bend its terminals so that the crystal is parallel and close to the board, then solder it. (photo 4
Break the 40-pin female header into four pieces: two 8-pin headers and two 6-pin headers. This should be done by removing one pin between each two pieces, then cut (more like crush) with a wire cutter along the empty space.
Position the headers into their right places along the sides of the board. Turn the board over and let it sit on the headers, making sure they are perpendicular to the board. Now solder all four headers. (photo 5
Solder the transistor, placing it to match its shape on the silkscreen.
Insert the 3 chips into their respective sockets, paying attention to their orientation. Their notches must match those in the sockets (whose notches should match those on the silkscreen).
Insert the coin battery in its holder.
At this point Wiseduino is assembled and ready to be used/tested. It should look like in photo 1