Controller

Soldering Parts to the PCB

Use the parts list (see appendix) to check if you have all the necessary parts to build the Autostudy CAN board. Alternatively, the following picture gives an overview of all the needed parts:

Figure 1.1: Parts

Figure 1.1: Parts

To solder the parts onto the board in the most efficient manner, parts with smaller height should be added first. Use the part list for reference. The first parts to be soldered on to the board are the resistors and diodes.

Figure 1.2: Step 1 Figure 1.2: Step 2

Figure 1.2: Step 1+2

After that, solder the oscillators (Q1, Q2), small capacitors (C1-C4) and the IC sockets onto the board. When soldering the IC sockets, the location of the IC socket’s notched ends have to match with the labels on the PCB. Buttons (KEY1, KEY2, KEY3, RESET) and LED (LED1, LED2, LED3, PWR-LED) are the next parts to be added subsequently.

Figure 1.3: Step 3 Figure 1.3: Step 4

Figure 1.3: Step 3 + 4

Solder pin headers, electrolytic capacitor (C5), DC jack and USB jack onto the board.

Figure 1.4: Step 5 Figure 1.4: Step 6

Figure 1.4: Step 5 + 6

In the last step, put the 4 IC (voltage regulator, Atmega32, CAN controller, CAN transceiver) into their corresponding sockets. The orientation of the IC has to match the orientation of the IC sockets (see the IC’s notched ends). Jumpers JP1, JP2, TERM are to be placed on the pin headers (2×1). Please note that the jumpers TERM and JP1 will not be used until later. Therefore, they must not (!) connect the two pins of their pin headers (see below). The soldering process is now complete and the board should be tested.

Figure 1.5: Step 7

Figure 1.5: Step 7

Testing the Board

Warning: The device can be powered by 3 different means: (1) through the use of the provided AC/DC-adaptor (2) from the PC over USB (3) over the CAN Bus from another CAN board that is being powered by one of the above mentioned means. The USB cable and the AC/DC-adaptor should not be plugged in simul- taneously (!). If 2 boards are connected via CAN, jumper JP1 can be used to power one board while the other board is powered by either (1) or (2). In this case, don not connect the secondary board to any other power source (!)

Figure 1.6: Structure

Figure 1.6: Structure

Example of three CAN-boards connected with ribbon cables, one powered by USB and the other two boards indirectly powered via CAN Connect the provided AC/DC-adaptor to the board’s DC jack. If the red PWR- LED doesn’t work, unplug the AC/DC-adaptor and check the orientation of the voltage regulator IC first. If the IC is positioned correctly, plug the adaptor back in and use a multimeter to confirm the correct voltage output of 5V between the voltage regulator’s ouput pins 1 and 4 (FB and GND, respectively). Unplug the AC/DC-adaptor and use the USB cable to connect the board to the PC. The red PWR-LED indicates that the device is functioning.

en/hardware/avr-can/controller.txt · Last modified: 2018/12/27 12:53 (external edit)
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