Parallax 27801 User manual

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Copyright © Parallax Inc. Page 1 of 4
Parallax 5-Position Switch KickStart (#27801)
What It Can Do
•Five switches in one, for adding joystick-style directional input to your project
•Switches are normally open momentary contact—press and release
•Integral pull-up resistors reduce external parts count
The 5-Position Switch contains five normally open momentary contact switches, mounted as a
miniature joystick on an 8-pin breakout board. The switches are arranged so that they can be
used for navigational control: Left, Right, Up, Down, and Center depress.
Each of the five switches contains its own 10 kΩ pull-up resistor, so you don’t need to add these
to your circuit. Just connect wires from the 5-Position Switch directly to your microcontroller.
•When a switch reads 1 (HIGH), it’s open (not activated)
•When a switch reads 0 (LOW), it’s closed (activated)
All switches are spring-loaded momentary. When you release the switch it returns to its normal
(not activated) state.
Note: The 5-Position Switch can detect multiple states at once, such as Up-Left, or Down-Right-
Center. How you deal with these multiple states is up to you and the way you write your
program.
Parts List
•5-Position Switch
•BASIC Stamp HomeWork Board, Propeller QuickStart, or Arduino Uno microcontroller
•22 gauge solid conductor hookup wire

Copyright © Parallax Inc. Page 2 of 4
Basic Wiring
•Power requirements: 3.3 to 5 VDC (typical); set supply voltage for compatibility with the input of
your microcontroller
•Communication: Single bit HIGH/LOW output for each position
•Dimensions: 0.70 x 0.95 x 0.78 in (17.8 x 24.1 x 19.8 mm)
Program KickStarts
The example programs display the current state of the switch in a terminal/debug window. The
switch function — such as Up or Left — is shown. The program is set to repeat indefinitely.
BASIC Stamp HomeWork Board
' {$STAMP BS2}
' {$PBASIC 2.5}
DO
IF (IN0 = 0) THEN DEBUG "Left", CR
IF (IN1 = 0) THEN DEBUG "Down", CR
IF (IN2 = 0) THEN DEBUG "Right", CR
IF (IN3 = 0) THEN DEBUG "Center", CR
IF (IN4 = 0) THEN DEBUG "Up", CR
PAUSE 200
LOOP
Note: When this program is run, the BASIC Stamp Debug Terminal will automatically open.

Copyright © Parallax Inc. Page 3 of 4
Propeller QuickStart
OBJ
pst : "Parallax Serial Terminal.spin"
CON
_clkmode = xtal1 + pll16x
_xinfreq = 5_000_000
PUB Main
dira[0..4]~ ' Pins 0-4 to input
pst.Start(115_200) ' Terminal to 115,200 baud
waitcnt(clkfreq + cnt)
repeat
if ina[0] == 0
pst.Str(String("Down",13))
if ina[1] == 0
pst.Str(String("Left",13))
if ina[2] == 0
pst.Str(String("Center",13))
if ina[3] == 0
pst.Str(String("Right",13))
if ina[4] == 0
pst.Str(String("Up",13))
waitcnt(clkfreq / 3 + cnt)
Note: This program uses the Parallax Serial Terminal object library, which is included with the
Propeller Tool software download.
Note: To view the results of the demonstration, after uploading is complete run the Parallax
Serial Terminal from the Run menu, or press F12. Momentarily depress the Reset button on the
Propeller QuickStart board to restart the program. See Using the Parallax Serial Terminal article
(Learn.Parallax.Com > Support > References) for more details.

Copyright © Parallax Inc. Page 4 of 4
Arduino Uno
void setup() {
Serial.begin(9600);
}
void loop() {
if(digitalRead(2) == LOW)
Serial.println("Left");
if(digitalRead(3)== LOW)
Serial.println("Down");
if(digitalRead(4) == LOW)
Serial.println("Right");
if(digitalRead(5) == LOW)
Serial.println("Up");
if(digitalRead(6) == LOW)
Serial.println("Center");
delay(200);
}
Note: To view the results of the demonstration, after uploading is complete click the Serial
Monitor icon in the Arduino IDE. This displays the Serial Monitor window. Momentarily
depress the Reset button on the Arduino board to restart the sketch.
For More Information
•See the 5-Position Switch (#27801) full documentation.