Build Your Own Door Alarm
Jessica Uelmen
Posts: 490
Build Your Own Door Alarm
·
Tired of family, co-worker or roommate troublemakers breaking into your room or office·while you’re away?· This project will deter those sneaky folks from messing with your stuff by demonstrating how to program a simple door alarm.· This alarm will use the Ping))) Ultrasonic Sensor to monitor the doorway, and will go off each time it detects an object within its range.· Just in case someone enters while you’re away, it will also record the number of times the alarm has been “tripped” and display it on the Parallax Serial LCD so you can check it when you get home!
·
·
Download Source Code (.zip)
Getting Started
This project uses parts and concepts included in·Smart Sensors and Applications, designed to be an example of a simple solution to a real world problem.· If you are new to the BASIC Stamp microcontroller or to programming, it would be a good idea to review the following before continuing:
·
√······· Complete the following chapters in What’s a Microcontroller:
o······· Chapter 1: Getting Started with the BASIC Stamp
o······· Chapter 2: Lights On – Lights Off
o······· Chapter 8: Frequency and Sound
√······· Complete the following chapters in Smart Sensors and Applications:
o······· Chapter 1: The Parallax Serial LCD
o······· Chapter 2: The Ping))) Ultrasonic Distance Sensor
Parts Required
(1) ·HomeWork Board with BASIC Stamp 2
····· The BASIC Stamp 2 Board of Education is also suitable for·this activity
(1) Ping))) Ultrasonic Distance Sensor
(1) Parallax Serial LCD
(1) Servo/LCD Extension Cable
(2) LEDs (any color)
(1) Piezospeaker
(2) 470 Ω Resistors
Optional Mounting Bracket Parts
(2) L-Shaped Mounting Brackets
(6) 4-40 zinc plated nuts
(4) 1/4" 4-40 pan-head screws
(2) 1/2" 4-40 pan-head screws
(2) 1/4" round nylon spacers #4
Schematics and Building the Circuits
Figure 1 shows the schematic and Figure 2 shows wiring diagram for the door alarm.· If you take a look at Figure 2, you may notice that the Parallax Serial LCD is mounted to the board using 90-degree universal mounting brackets.· These are included in the Smart Sensors and Applications Kit, but are not required for the project.· However, if you would like to use them, please see Figure 3 for an assembly diagram.
Figure 1 – Door Alarm Schematic
Figure 2 – Door Alarm Wiring Diagram
Figure 3 – Parallax Serial LCD Mounting Bracket Assembly Diagram
Testing the Circuit
Before continuing, it’s always a good idea to check the wiring for any errors.· This will help save value troubleshooting time when you already know that each component is connected correctly.· Run TestAlarmCircuit.bs2 and verify that the following occurs:
·
√······· The piezospeaker emits a tone
√······· The LEDs turn on
√······· The echo time of the Ping))) sensor is displayed on the Serial LCD
Before moving on, test the circuit in the area you want to monitor and make a note of the echo time of the Ping))) when nothing is in its way.· That way, when you program the alarm later, you can tell it to activate if the echo time is less than the unobstructed distance of the area you are monitoring.
Custom Characters and the Final Program
This example alarm makes use of the custom characters that are set aside for the Parallax Serial LCD, specifically to display a Jolly Roger – or skull and crossbones.· Smart Sensors and Applications, Chapter 1 - Activity #4 demonstrates how to define your own custom characters to display as you please.· If you don’t like the Jolly Roger, replace it with whatever you want!
·
Once you’ve decided on a final display for your alarm, it’s time to run the final program.· Before programming the alarm, there are two parts of the program that you will have to replace:
·
√······· maxDist:· This constant is the echo time of the Ping))) when placed, unobstructed in the area you want to monitor.
√······· Jolly Roger Custom Characters: Replace this section with the custom characters you want to use.
After you’ve set the alarm, place it in the area you want to monitor and make sure it doesn’t activate when nothing is in its way.· If it does, try decreasing the maxDist constant until the alarm only activates as someone walks by.
How it Works
First, the program stores the echo time measurement from the Ping))) into a variable named time.·
· PULSOUT 15, 5
· PULSIN· 15, 1, time
·
That value is then compared to the maxDist constant defined at the beginning of the program.· If the echo time is less than that value, it displays the total number of times the alarm was triggered and sounds the alarm.
· IF (time < maxDist) THEN
··· intruderCnt = intruderCnt + 1
·
··· SEROUT 11, 84, [noparse][[/noparse]128, 0, 129, 2, 130, 4,
··················· 148, 1, 149, 3, 150, 5]
··· SEROUT 11, 84, [noparse][[/noparse]132, DEC intruderCnt,
··················· " intruders "]
··· SEROUT 11, 84, [noparse]/noparse]153, [/size][/font][font=Times New Roman][size=2][color=#ff0000]"detected!! "[/color][/size][/font][font=Times New Roman][size=2
·
··· FOR counter = 0 TO 3
····· FREQOUT 14, 500, 3800
····· PAUSE 100
····· HIGH 13
····· HIGH 12
····· FREQOUT 14, 500, 2700
····· PAUSE 100
····· LOW 13
····· LOW 12
··· NEXT
·
If no intruders have been detected, the LCD displays that the alarm is armed to deter people from entering the room.
·
· ELSEIF (intruderCnt = 0) THEN
··· SEROUT 11, 84, [noparse][[/noparse]128, 0, 129, 2, 130, 4,
··················· 148, 1, 149, 3, 150, 5]
··· SEROUT 11, 84, [noparse][[/noparse]133, "Alarm",
··················· 153, "Armed!"]
··· SEROUT 11, 84, [noparse][[/noparse]141, 0, 142, 2, 143, 4,
··················· 161, 1, 162, 3, 163, 5]
Get Creative!
This project gives you a simple application for this alarm.· However, there are several things to keep in mind when implementing this design.· Take a moment to consider each one and come up with your own solution!· It could be as simple as disconnecting parts or adding another extension cable to the Ping))) so you can mount it away from the board.· In any case, each situation is different, and you’ll have to find the solution that best works for you!
·
√······· If you aren’t home when the alarm goes off…
o······· Problem: What if the alarm is triggered and the intruder finds the board and unplugs the battery?· Is there a stealthier way to hide the alarm, or a way to modify the code to add a “Stealth Mode”?
√······· If you have pets…
o······· Problem: How will you make sure that a person is triggering the alarm and not your pet?
√······· If a persistent intruder knows where the alarm is hidden…
o······· Problem: What if you have a consistent intruder who knows the location of the alarm and constantly disconnects power to the board?· Is there a way to write the number of intrusions to memory so you can recover it even if power has been disconnected?· (Hint: See Smart Sensors and Applications Chapter 6.)
√······· If you’re a grammar nut…
o······· Problem: You may notice that the word “intruders” is displayed even if only one intruder is detected.· (And the statement “1 intruders detected” just isn’t proper English.)· Is there a way you can modify the code to do the following:
§········ If 0 intruders are detected, the LCD displays: No intruders detected!
§········ If 1 intruder is detected, the LCD displays: 1 intruder detected!
§········ 2 or more intruders detected, the LCD displays: 2 intruders detected!
__________________________________________________ ___________________________
··
(c) 2009·by Parallax Inc - all rights reserved.··
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Jessica Uelmen
Education Department
Parallax Inc.
Post Edited (Jessica Uelmen (Parallax)) : 8/25/2010 6:32:10 PM GMT
·
Tired of family, co-worker or roommate troublemakers breaking into your room or office·while you’re away?· This project will deter those sneaky folks from messing with your stuff by demonstrating how to program a simple door alarm.· This alarm will use the Ping))) Ultrasonic Sensor to monitor the doorway, and will go off each time it detects an object within its range.· Just in case someone enters while you’re away, it will also record the number of times the alarm has been “tripped” and display it on the Parallax Serial LCD so you can check it when you get home!
·
·
Download Source Code (.zip)
Getting Started
This project uses parts and concepts included in·Smart Sensors and Applications, designed to be an example of a simple solution to a real world problem.· If you are new to the BASIC Stamp microcontroller or to programming, it would be a good idea to review the following before continuing:
·
√······· Complete the following chapters in What’s a Microcontroller:
o······· Chapter 1: Getting Started with the BASIC Stamp
o······· Chapter 2: Lights On – Lights Off
o······· Chapter 8: Frequency and Sound
√······· Complete the following chapters in Smart Sensors and Applications:
o······· Chapter 1: The Parallax Serial LCD
o······· Chapter 2: The Ping))) Ultrasonic Distance Sensor
Parts Required
(1) ·HomeWork Board with BASIC Stamp 2
····· The BASIC Stamp 2 Board of Education is also suitable for·this activity
(1) Ping))) Ultrasonic Distance Sensor
(1) Parallax Serial LCD
(1) Servo/LCD Extension Cable
(2) LEDs (any color)
(1) Piezospeaker
(2) 470 Ω Resistors
Optional Mounting Bracket Parts
(2) L-Shaped Mounting Brackets
(6) 4-40 zinc plated nuts
(4) 1/4" 4-40 pan-head screws
(2) 1/2" 4-40 pan-head screws
(2) 1/4" round nylon spacers #4
Schematics and Building the Circuits
Figure 1 shows the schematic and Figure 2 shows wiring diagram for the door alarm.· If you take a look at Figure 2, you may notice that the Parallax Serial LCD is mounted to the board using 90-degree universal mounting brackets.· These are included in the Smart Sensors and Applications Kit, but are not required for the project.· However, if you would like to use them, please see Figure 3 for an assembly diagram.
Figure 1 – Door Alarm Schematic
Figure 2 – Door Alarm Wiring Diagram
Figure 3 – Parallax Serial LCD Mounting Bracket Assembly Diagram
Testing the Circuit
Before continuing, it’s always a good idea to check the wiring for any errors.· This will help save value troubleshooting time when you already know that each component is connected correctly.· Run TestAlarmCircuit.bs2 and verify that the following occurs:
·
√······· The piezospeaker emits a tone
√······· The LEDs turn on
√······· The echo time of the Ping))) sensor is displayed on the Serial LCD
[color=#008000]' TestAlarmCircuit.bs2[/color]
[color=#008000]' Checks that each aspect of the alarm circuit is working.[/color]
[color=#008000]' {$STAMP BS2}[/color]
[color=#008000]' {$PBASIC 2.5}[/color]
[color=#000000]time VAR Word[/color]
[color=#000000]counter VAR Byte[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]22, 12] [/color][color=#008000]' Initialize the LCD[/color]
[color=#020FC0]PAUSE[/color][color=#000000] 5[/color]
[color=#020FC0]FREQOUT[/color][color=#000000] 14, 500, 2000 [/color][color=#008000]' Play a tone[/color]
[color=#020FC0]D[/color][color=#000000]O[/color]
[color=#020FC0]PULSOUT[/color][color=#000000] 15, 5 [/color][color=#008000]' Get echo times[/color]
[color=#020FC0]PULSIN[/color][color=#000000] 15, 1, time[/color]
[color=#020FC0]HIGH[/color][color=#000000] 13 [/color][color=#008000]' Turn LEDs on[/color]
[color=#020FC0]HIGH[/color][color=#000000] 12[/color]
[color=#008000]' Display echo times on LCD[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]128, [/color][color=#ff0000]"time = "[/color][color=#000000], [/color][color=#000080]DEC5[/color][color=#000000] time][/color]
[color=#020FC0]PAUSE[/color][color=#000000] 200[/color]
[color=#020FC0]LOOP[/color]
Before moving on, test the circuit in the area you want to monitor and make a note of the echo time of the Ping))) when nothing is in its way.· That way, when you program the alarm later, you can tell it to activate if the echo time is less than the unobstructed distance of the area you are monitoring.
Custom Characters and the Final Program
This example alarm makes use of the custom characters that are set aside for the Parallax Serial LCD, specifically to display a Jolly Roger – or skull and crossbones.· Smart Sensors and Applications, Chapter 1 - Activity #4 demonstrates how to define your own custom characters to display as you please.· If you don’t like the Jolly Roger, replace it with whatever you want!
·
Once you’ve decided on a final display for your alarm, it’s time to run the final program.· Before programming the alarm, there are two parts of the program that you will have to replace:
·
√······· maxDist:· This constant is the echo time of the Ping))) when placed, unobstructed in the area you want to monitor.
√······· Jolly Roger Custom Characters: Replace this section with the custom characters you want to use.
[color=#008000]' -----[noparse][[/noparse] Title ]-----------------------------------------------------------[/color]
[color=#008000]' DoorAlarm.bs2[/color]
[color=#008000]' Monitors a doorway until an object is in the way, then an alarm sounds,[/color]
[color=#008000]' and the number of triggers are recorded and displayed to the LCD.[/color]
[color=#008000]' {$STAMP BS2}[/color]
[color=#008000]' {$PBASIC 2.5}[/color]
[color=#008000]' -----[noparse][[/noparse] Variables ]-------------------------------------------------------[/color]
[color=#000000]time VAR Word [/color][color=#008000]' Round trip echo time[/color]
[color=#000000]intruderCnt VAR Byte [/color][color=#008000]' Count of alarm triggers[/color]
[color=#000000]counter VAR Word [/color][color=#008000]' Counter for FOR...NEXT loop[/color]
[color=#008000]' -----[noparse][[/noparse] Constants ]-------------------------------------------------------[/color]
[color=#000000]maxDist CON 2000 [/color][color=#008000]' Maximum distance for alarm trigger[/color]
[color=#008000]' -----[noparse][[/noparse] Jolly Roger Custom Characters ]-----------------------------------[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]248, %00000, %11000, %11000, %01100, [/color][color=#008000]' Top left[/color]
[color=#000000] %01110, %11011, %11001, %00000] [/color][color=#008000]' crossbone[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]249, %00000, %11001, %11011, %01110, [/color][color=#008000]' Bottom left[/color]
[color=#000000] %01100, %11000, %11000, %00000] [/color][color=#008000]' crossbone[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]250, %00000, %01110, %11111, %11111, [/color][color=#008000]' Top half[/color]
[color=#000000] %10101, %10101, %11111, %01110] [/color][color=#008000]' of skull[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]251, %01110, %11111, %11111, %10001, [/color][color=#008000]' Bottom half[/color]
[color=#000000]%10001, %11111, %01110, %00000] [/color][color=#008000]' of skull[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]252, %00000, %00011, %00011, %00110, [/color][color=#008000]' Top right[/color]
[color=#000000] %01110, %11011, %10011, %00000] [/color][color=#008000]' crossbone[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]253, %00000, %10011, %11011, %01110, [/color][color=#008000]' Bottom right[/color]
[color=#000000]%00110, %00011, %00011, %00000] [/color][color=#008000]' crossbone[/color]
[color=#008000]' -----[noparse][[/noparse] Initialization ]--------------------------------------------------[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]22,12] [/color][color=#008000]' Initialize LCD[/color]
[color=#020FC0]PAUSE[/color][color=#000000] 5[/color]
[color=#000000]intruderCnt = 0 [/color][color=#008000] ' Reset intruder count to 0[/color]
[color=#008000]' -----[noparse][[/noparse] Main Routine ]----------------------------------------------------[/color]
[color=#020FC0]DO[/color]
[color=#020FC0]PULSOUT[/color][color=#000000] 15, 5 [/color][color=#008000]' Send pulse[/color]
[color=#020FC0]PULSIN[/color][color=#000000] 15, 1, time [/color][color=#008000]' Read echo time[/color]
[color=#020FC0]IF[/color][color=#000000] (time < maxDist) [/color][color=#020FC0]THEN[/color] [color=#008000]' If alarm is triggered...[/color]
[color=#000000] intruderCnt = intruderCnt + 1[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]128, 0, 129, 2, 130, 4, [/color][color=#008000]' Display Jolly Roger[/color]
[color=#000000] 148, 1, 149, 3, 150, 5][/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]132, [/color][color=#000080]DEC[/color][color=#000000] intruderCnt, [/color][color=#008000]' Display number of alarm[/color]
[color=#ff0000]" intruders "[/color][color=#000000]] [/color][color=#008000]' triggers on the LCD[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]153, [/color][color=#ff0000]"detected!! "[/color][color=#000000]][/color]
[color=#020FC0]FOR[/color][color=#000000] counter = 0 [/color][color=#020FC0]TO[/color][color=#000000] 3[/color]
[color=#020FC0]FREQOUT[/color][color=#000000] 14, 500, 3800 [/color][color=#008000]' Play alarm tone[/color]
[color=#020FC0]PAUSE[/color][color=#000000] 100[/color]
[color=#020FC0]HIGH[/color][color=#000000] 13 [/color][color=#008000]' Flash LEDs[/color]
[color=#020FC0]HIGH[/color][color=#000000] 12[/color]
[color=#020FC0]FREQOUT[/color][color=#000000] 14, 500, 2700 [/color][color=#008000]' Play lower tone for variety[/color]
[color=#020FC0]PAUSE[/color][color=#000000] 100[/color]
[color=#020FC0]LOW[/color][color=#000000] 13 [/color][color=#008000] ' Flash LEDs[/color]
[color=#020FC0]LOW[/color][color=#000000] 12[/color]
[color=#020FC0]NEXT[/color]
[color=#020FC0]ELSEIF[/color][color=#000000] (intruderCnt = 0) [/color][color=#020FC0]THEN[/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]128, 0, 129, 2, 130, 4, [/color][color=#008000]' Display Jolly Roger[/color]
[color=#000000] 148, 1, 149, 3, 150, 5][/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]133, [/color][color=#ff0000]"Alarm"[/color][color=#000000],[/color]
[color=#000000] 153, [/color][color=#ff0000]"Armed!"[/color][color=#000000]][/color]
[color=#020FC0]SEROUT[/color][color=#000000] 11, 84, [noparse][[/noparse]141, 0, 142, 2, 143, 4, [/color][color=#008000]' Display Jolly Roger[/color]
[color=#000000] 161, 1, 162, 3, 163, 5][/color]
[color=#020FC0]ENDIF[/color]
[color=#020FC0]PAUSE[/color][color=#000000] 100[/color]
[color=#020FC0]LOOP[/color]
After you’ve set the alarm, place it in the area you want to monitor and make sure it doesn’t activate when nothing is in its way.· If it does, try decreasing the maxDist constant until the alarm only activates as someone walks by.
How it Works
First, the program stores the echo time measurement from the Ping))) into a variable named time.·
· PULSOUT 15, 5
· PULSIN· 15, 1, time
·
That value is then compared to the maxDist constant defined at the beginning of the program.· If the echo time is less than that value, it displays the total number of times the alarm was triggered and sounds the alarm.
· IF (time < maxDist) THEN
··· intruderCnt = intruderCnt + 1
·
··· SEROUT 11, 84, [noparse][[/noparse]128, 0, 129, 2, 130, 4,
··················· 148, 1, 149, 3, 150, 5]
··· SEROUT 11, 84, [noparse][[/noparse]132, DEC intruderCnt,
··················· " intruders "]
··· SEROUT 11, 84, [noparse]/noparse]153, [/size][/font][font=Times New Roman][size=2][color=#ff0000]"detected!! "[/color][/size][/font][font=Times New Roman][size=2
·
··· FOR counter = 0 TO 3
····· FREQOUT 14, 500, 3800
····· PAUSE 100
····· HIGH 13
····· HIGH 12
····· FREQOUT 14, 500, 2700
····· PAUSE 100
····· LOW 13
····· LOW 12
··· NEXT
·
If no intruders have been detected, the LCD displays that the alarm is armed to deter people from entering the room.
·
· ELSEIF (intruderCnt = 0) THEN
··· SEROUT 11, 84, [noparse][[/noparse]128, 0, 129, 2, 130, 4,
··················· 148, 1, 149, 3, 150, 5]
··· SEROUT 11, 84, [noparse][[/noparse]133, "Alarm",
··················· 153, "Armed!"]
··· SEROUT 11, 84, [noparse][[/noparse]141, 0, 142, 2, 143, 4,
··················· 161, 1, 162, 3, 163, 5]
Get Creative!
This project gives you a simple application for this alarm.· However, there are several things to keep in mind when implementing this design.· Take a moment to consider each one and come up with your own solution!· It could be as simple as disconnecting parts or adding another extension cable to the Ping))) so you can mount it away from the board.· In any case, each situation is different, and you’ll have to find the solution that best works for you!
·
√······· If you aren’t home when the alarm goes off…
o······· Problem: What if the alarm is triggered and the intruder finds the board and unplugs the battery?· Is there a stealthier way to hide the alarm, or a way to modify the code to add a “Stealth Mode”?
√······· If you have pets…
o······· Problem: How will you make sure that a person is triggering the alarm and not your pet?
√······· If a persistent intruder knows where the alarm is hidden…
o······· Problem: What if you have a consistent intruder who knows the location of the alarm and constantly disconnects power to the board?· Is there a way to write the number of intrusions to memory so you can recover it even if power has been disconnected?· (Hint: See Smart Sensors and Applications Chapter 6.)
√······· If you’re a grammar nut…
o······· Problem: You may notice that the word “intruders” is displayed even if only one intruder is detected.· (And the statement “1 intruders detected” just isn’t proper English.)· Is there a way you can modify the code to do the following:
§········ If 0 intruders are detected, the LCD displays: No intruders detected!
§········ If 1 intruder is detected, the LCD displays: 1 intruder detected!
§········ 2 or more intruders detected, the LCD displays: 2 intruders detected!
__________________________________________________ ___________________________
··
(c) 2009·by Parallax Inc - all rights reserved.··
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Jessica Uelmen
Education Department
Parallax Inc.
Post Edited (Jessica Uelmen (Parallax)) : 8/25/2010 6:32:10 PM GMT
595 x 239 - 22K
368 x 347 - 29K
582 x 191 - 23K
727 x 160 - 26K
Comments
Just an idea, if one is inspired to tinker on various simple projects in between the head-busters like I do..
Good luck
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EverQurious
Post Edited (EverQurious) : 6/13/2009 8:03:10 AM GMT
That's a great idea, and would only take a little modification of the original code. We definitely support tinkering here at Parallax! [noparse]:)[/noparse]
Jessica
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Jessica Uelmen
Education Department
Parallax, Inc.
I like the text based intruder in the video..
Also, I couldn't download the ZIP. I got this:
Post Edited (SRLM) : 6/15/2009 9:41:27 PM GMT
More fun! Maybe I could use this to keep my kids in bed!
By the way the ZIP is working now.
Another fun coding problem might be...
For no intuders - the LCD displays
No·intuders
detected!
For 1 intruder - the LCD displays
1 intruder
detected!
For more that 1 intruder, the LCD returns to the plural - "intruders."
2 intruders
detected!
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Whit+
"We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
Post Edited (Whit) : 6/17/2009 3:51:14 PM GMT
Funny you should mention the additional code problem! We got the idea for this project from a local middle school we visited. The kids suggested this application after we we let them play with the PING, and so we thought it would be fun to demonstrate a simple solution to a real world problem that students deal with every day. If kids can relate to applications, they get all the more excited about programming and microcontrollers!
As I was prototyping this, I was trying to decide whether to use the DEBUG Terminal and EEPROM to display the intruder count or to keep it simple with the Serial LCD. When I finished the DEBUG application, I did address that issue since I am a bit of a grammar nut. But in an effort to keep the code as simple as possible, I neglected to address that issue again when I decided to stick with Smart Sensors parts. I'll add that to the end of the post, since that is definitely a good habit for students to get in to!
Jessica
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Jessica Uelmen
Education Department
Parallax, Inc.
Post Edited (Jessica Uelmen (Parallax)) : 6/17/2009 4:59:28 PM GMT
I also saw an article yesterday on the web that said that "definitely" is the most ofter misspelled word. You, of course, spelled it correctly!
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Whit+
"We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
Post Edited (Whit) : 6/17/2009 5:47:47 PM GMT
I just got the same error message as SLRM.
Jessica
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Jessica Uelmen
Education Department
Parallax, Inc.
It seems okay now, but it wasn't working for a few days.
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Jessica Uelmen
Education Department
Parallax, Inc.
s245.photobucket.com/albums/gg54/BM55_2003/tech%20videos/?action=view¤t=Fromwwwmetacafecom1018992579161311.flv
That's a great idea, and would only take a little modification of the original code. We definitely support tinkering here at Parallax! [noparse]:)[/noparse]
Jessica
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Jessica Uelmen
Education Department
Parallax, Inc.[/QUOTE]