1 ARDUINO SEVERINO SERIAL SINGLE SIDED VERSION 3 S3v3 (REVISION 2) USER MANUAL X1: DE-9 serial connector Used to connect computer (or other devices) using RS-232 standard. Needs a serial cable, with at least 4 pins connected: 2, 3, 4 and 5. Works only when JP0 is set to 2-3 position. DC1: 2.1 mm. power jack Used to connect external power source. Centre positive. Voltage Regulator Works with regulated +7 to +20 volts DC (9v. to 12v. is recommended). It is possible to alternatively connect external power using 9v. pin or 5v. pin. (see POWER PINOUT)
2 ICSP: 2x3 pin header Used to program Atmega with bootloader. The number 1 on both sides of the board indicates cable pin1 position. Used to upload sketches on Atmega ICs without bootloader (available only in Arduino IDE versions 0011 and 0012). JP0 3 pins jumper When in position 2-3, this jumper enables serial connection (through X1 connector) to/from computer/devices. Use this as default position. When in position 1-2, it disables serial communication, and enables external pull-down resistors on pin0 (RX) and pin1 (TX). Use this only to prevent noise on RX (that seems incoming data to Atmega), that sometimes makes sketch not starting. When removing this jumper, serial communication is disabled, and pin0 and pin1 work as a normal (floating) digital pin. Useful when more digital pins are needed, but only when serial communication is not necessary. External pull-down/pull-up resistor is required. JP4 2 pins jumper When in position 1-2, this jumper enables auto reset feature, useful when uploading a sketch to Arduino, resetting Atmega automatically. It makes unnecessary to press reset button (S1) when uploading sketches. Be sure that computer COM Port speed is set to 19200bps otherwise auto reset will not work properly. If removed, disables auto reset feature. Very useful to prevent undesired Atmega reset when using sketches that needs serial communication. Auto reset works with DTR pulse on serial pin4. Sometimes Arduino senses a DTR pulse when connecting X1 (serial connector) and some softwares sends a DTR pulse when it starts or when it closes, that makes Atmega reset when not desired.
3 S1 Tactile button This button resets Atmega, to restart uploaded sketch or to prepare Arduino to receive a sketch through serial connector (when auto reset is not active). LEDS Indicative leds POWER led Turns on when Arduino is powered through DC1, +9v. pin or +5v. pin. RX led Blinks when receiving data from computer/device through serial connection. TX led Blinks when sending data to computer/device through serial connection. L led This led is connected to digital pin13 with a current limiter resistor (that doesn t affect pin13). Useful to test sketches. It is normal to blink when bootloading too. POWER PINOUT 6 pin header RST pin Makes Atmega reset when connected to GND. Useful for Shield Boards, or to connect external reset. NC pin This pin is not connected in Arduino S3v3. Arduino Diecimila has a 3.3 volts pin in the same position.
4 +9v. pin When Arduino DC1 is powered (with battery or DC adaptor), this pin is used as Vout, with the same voltage supplied on DC1 (see DC1), minus 0,7 volts. The total supplied current depends on external power source capacity When Arduino DC1 is not powered, +9v. pin can be used as Vin, connecting it to a external regulated power source (+7 to +20 volts) and connecting 0v. pin to external power source GND. In this case, +5v. pin can be used as Vout, supplying +5 volts. +5v. pin When Arduino DC1 is powered (with battery or DC adaptor), +5v. pin supplies +5 volts as a Vout pin. The total supplied current depends on Voltage Regulator (7805 supplies up to 1A). This applies only to +5v. pin: Atmega in/out pins only supplies max. 40mA on each pin. When Arduino DC1 is not powered, this pin can be used as Vin, connecting it to a regulated +5v. and connecting 0v. pin to power source GND. In this case, +9v. pin is inactive. 0v. pin (GND) Two 0v. pins between +5v. and +9v. / One 0v. pin beside AREF pin. When Arduino DC1 is powered, 0v. pin supplies 0 volts reference (GND) for +5v. pin and +9v. pin. When DC1 is not powered, and Arduino is powered through +5v. pin or +9v. pin, 0v. pin must be used as GND reference, connecting it to the external power source GND. DIGITAL IN/OUT PINOUT 8 pin header (x2) 8 digital inputs/outputs: 0 to 7, corresponding to Port D. Pin0 (RX) and pin1 (TX) can be used as communication pins. Pin3, pin5 and pin6 can be used as PWM pins (Atmega168 only). 6 digital inputs/outputs: 8 to 13, corresponding to Port B. Pin10 (SS), pin11 (MOSI), pin12 (MISO) and pin13 (SCK) can be used as SPI (Serial Peripheral Interface). Pin9, pin10 and pin11 can be used as PWM pins (Atmega8 and Atmega168).
5 ANALOG IN PINOUT 6 pin header 6 analog inputs: 0 to 5, corresponding to Port C. Pin4 (SDA) and pin5 (SCL) can be used with I2C (two-wire serial bus). The analog input pins can be used as digital pins with numbers 14 (analog input 0) to 19 (analog input 5). 1 GND pin see 0v. pin (GND). AREF pin The AREF can be set to AVcc (default), internal 2.56 volts (Atmega8), internal 1.1 volts (Atmega168), or external AREF. In case of AVcc or internal AREF, AREF pin can be used to attach na external capacitor to decouple the signal, for better noise performance. In case of external AREF, AREF pin is used to attach the external reference voltage. Remember that it is necessary to change de fuses (wiring.c file), and re-upload sketch, before connecting external voltage to AREF. SOFTWARE TIPS When bootloading na Atmega8 chip with Arduino 0010, there is a command (-i800) that makes bootloader delay 10 minutes. So, if you need to use bootloader, use command line instead of IDE, removing i800 command and adding F command, or use Arduino 0007 IDE. To upload sketches Arduino 0010 works fine.
6 ARDUINO S3v3 NEW FEATURES full compatible with Shield Boards (Version 2 is the only Arduino Board not compatible with Shield Boards because of ICSP header wrong position, and tall components); AVcc LP filter to reduce noise level on ADC; auto reset feature; auto reset enable/disable jumper, to avoid not desired reseting; arduino Diecimila compatible reset pin; pin13 onboard led, with current limiter resistor; TX and RX onboard leds; power led with appropriate current limiter resistor (less 20mA of comsumption); jumper to disable serial communication and to enable RX external pull down resistor, to avoid RX floating error. This feature allows to use digital pin0 and pin1 as a normal pin, when serial communication is not needed; all similar components (diodes, transistors, leds, capacitors) has the same board orientation (to makes easier to mount with less mistakes); no wires between pads, more space between wires, larger wires, larger pads (better for etching, soldering and drilling, with no short circuits, soldering bridges or open wires in corrosion); only 3 wire bridges; electrolitic capacitor (in serial to TTL circuit) changed to bipolar type (to avoid inverted voltage problem when serial cable is not connected); All jumpers are right angle type, to allow Shield Boards use. Adilson Akashi 27/dec/2008
7 ARDUINO SEVERINO SERIAL SINGLE SIDED VERSION 3 S3v3 (REVISION 2) MOUNTING MANUAL
8 BILL OF MATERIAL FOR ARDUINO SERIAL SINGLE SIDED VERSION 3 (S3V3) - REVISION 2 QTY POSITION DESCRIPTION VALUE DETAIL 2 C1, C2 ceramic disc capacitor 22pF (22 pico Farad) 4 C3, C4, C6, C7 ceramic or polyester capacitor 100nF (100 nano Farad - or 0.1 micro Farad) 2 C5, C8 electrolytic capacitor 100µF (100 micro Farad) 16volts (or more: 25v) radial-lead 1 C9 non-polarized electrolytic 10µF (10 micro Farad) 16volts (or more: 25v, 50v) radial-lead capacitor 1 D1 diode 1N4004 DO D2, D3 diode 1N4148 DO DC1 2.1mm. DC power jack 1 IC1 ATMEGA8 (or ATMEGA168) 28P3 package 1 IC2 Tension Regulator 7805C 1 ICSP male pin header 2x3 2 J1, J3 female pin header 1x8 0.1" (or 2.54 mm.) 2 J2, female pin header 1x6 0.1" (or 2.54 mm.) POWER 1 JP0 right angle pin header 1x3 0.1" (or 2.54 mm.) 1 JP4 right angle pin header 1x2 0.1" (or 2.54 mm.) 1 L1 leaded inductor 100µH (100 micro Henry) axial leaded (silver)brown, black, brown, golden 4 LED0, LED 3 mm. choose colors LED1, LED13, LED14 1 Q1 16 MHz crystal 5 R1, R2, R3, R4, R6 Resistor 1kohm (1.0 kilo ohms) 1/4 Watt, ±5% brown, black, red, gold 1 R9 Resistor 4k7ohms (4.7 kilo ohms) 1/4 Watt, ±5% yellow, violet, red, gold 5 R5, R7, R8, R10, Resistor 10kohms (10.0 kilo ohms) 1/4 Watt, ±5% brown, black, orange, gold R11 1 S1 Switch Tactile 6x6 mm., 4 terminals B3F-10XX 1 T1 Transistor BC547 NPN general purpose TO92 transistor 1 T2 Transistor BC557 PNP general purpose TO92 transistor 1 X1 D-SUB CONNECTOR 9 PIN FEMALE RIGHT ANGLE PC DE-9 CONNECTOR MOUNT 2 Jumpers jumper for 0.1" header 0.1" (or 2.54 mm.)
9 PART LIST FOR ARDUINO SERIAL SINGLE SIDED VERSION 3 (S3V3) - REVISION 2 POSITION VALUE DESCRIPTION DETAIL C1 22pF (22 pico Farad) ceramic disc capacitor C2 22pF (22 pico Farad) ceramic disc capacitor C3 100nF (100 nano Farad - or 0.1 micro Farad) ceramic or polyester capacitor C4 100nF (100 nano Farad - or 0.1 micro Farad) ceramic or polyester capacitor C5 100µF (100 micro Farad) electrolytic capacitor 16volts (or more: 25v) radial-lead C6 100nF (100 nano Farad - or 0.1 micro Farad) ceramic or polyester capacitor C7 100nF (100 nano Farad - or 0.1 micro Farad) ceramic or polyester capacitor radial-lead C8 100µF (100 micro Farad) electrolytic capacitor 16volts (or more: 25v) radial-lead C9 10µF (10 micro Farad) non-polarized electrolytic capacitor 16volts (or more: 25v, 50v) radial-lead D1 1N4004 diode DO41-10 D2 1N4148 diode DO35-10 D3 1N4148 diode DO35-10 DC1 2.1mm. DC power jack IC1 ATMEGA8 (or ATMEGA168) 28P3 package IC2 7805C Tension Regulator ICSP 2x3 male pin header ICSP J1 1x8 female pin header 0.1" (or 2.54 mm.) PORT D(D0-D7) J2 1x6 female pin header 0.1" (or 2.54 mm.) PORT C(A0-A5) J3 1x8 female pin header 0.1" (or 2.54 mm.) PORT B(D8-D13) JP0 1x3 right angle pin header 0.1" (or 2.54 mm.) JP4 1x2 right angle pin header 0.1" (or 2.54 mm.) AUTO RESET L1 100µH leaded inductor axial leaded (silver)brown, black, brown, golden LED0 3 mm. LED choose a color Rx Led LED1 3 mm. LED choose a color Tx Led LED13 3 mm. LED choose a color Pin13 Led LED14 3 mm. LED choose a color Power Led POWER 1x6 female pin header Q1 16 MHz crystal R1 1kohm (1.0 kilo ohm) Resistor 1/4 Watt, ±5% brown, black, red, gold R2 1kohm (1.0 kilo ohm) Resistor 1/4 Watt, ±5% brown, black, red, gold R3 1kohm (1.0 kilo ohm) Resistor 1/4 Watt, ±5% brown, black, red, gold R4 1kohm (1.0 kilo ohm) Resistor 1/4 Watt, ±5% brown, black, red, gold R5 10kohms (10.0 kilo ohms) Resistor 1/4 Watt, ±5% brown, black, orange, gold R6 1kohm (1.0 kilo ohm) Resistor 1/4 Watt, ±5% brown, black, red, gold R7 10kohms (10.0 kilo ohms) Resistor 1/4 Watt, ±5% brown, black, orange, gold R8 10kohms (10.0 kilo ohms) Resistor 1/4 Watt, ±5% brown, black, orange, gold R9 4k7ohms (4.7 kilo ohms) Resistor 1/4 Watt, ±5% yellow, violet, red, gold R10 10kohms (10.0 kilo ohms) Resistor 1/4 Watt, ±5% brown, black, orange, gold R11 10kohms (10.0 kilo ohms) Resistor 1/4 Watt, ±5% brown, black, orange, gold S1 6x6 mm., 4 terminals Switch Tactile B3F-10XX T1 BC547 Transistor NPN general purpose transistor TO92 T2 BC557 Transistor PNP general purpose transistor TO92 X1 9 PIN FEMALE RIGHT ANGLE PC MOUNT D-SUB CONNECTOR DE-9 CONNECTOR jumper 0.1" (or 2.54 mm.) jumper 0.1" (or 2.54 mm.)
10 PCB SOLDERING SIDE (Mirror Image) PCB COMPONENT SIDE (Mirror Image)
11 SCHEMATIC DRILLING DIAGRAM (Soldering Side View)
12 MOUNTING DIAGRAM (Component Side View) Mounting Tips Pay attention to LED s lateral chamfer, electrolitical capacitor s negative (-) pole mark (mounting diagram has positive (+) mark), diode s stripe, Atmega IC s and IC socket s notch, and transistor s numbers and positions. Note that similar components have the same board orientation.
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