Security with a old Pentium 1 Part II

Micro-controllers are very neat. Have a few myself. Connecting to micro-controllers or to a PC is basically the same. So you do not have a micro-controller yet, grab an old PC and get to work.  This is an extension of the original instructable: Security with a Pentium I.  You can find the original instructable at http://www.instructables.com/id/Security-system-with-old-pentium-1/ . This time we add a pir sensor, heat sensors, and a emf sensor to the mix. My goal is to give you just enough information so you can make up your own system your way. That is half the fun of it to experiment. If you have a newer machine with the built-in parallel and joystick ports should do just as well, but be extremely careful.  USB ports with parallel and joystick interface cables tend not to work.

Among the other parts needed:
Both a db15 male joystick and a db25 male connector. You could use the one from the original project as I tried to use different pins to avoid conflict.

Note: As always do this at you own risk, I will not be responsible for any issues. All circuits and code are untested, contract a professional if you are unsure. Note each sensor should be on a separate pin. I just used the same pin for testing purposes.

Update: I am not an electronics specialist. If you have any concern with what is done here, ask a professional. I am testing the circuits and if there are any changes needed should be done soon so this instructable will tend to get updated once in a while.
----------------------------------------------------------------

pin     purpose
1       potentiometer common            (Joy A)
2       button 1                        (Joy A)
3       X coordinate potentiometer      (Joy A)
4       button common                   (Joy A)
5       button common                   (Joy B)
6       Y coordinate potentiometer      (Joy A)
7       button 2                        (Joy A)
8       unused
9       potentiometer common            (Joy B)
10      button 1                        (Joy B)
11      X coordinate potentiometer      (Joy B)
12      MIDI TXD (transmit)             (computer -> midi)
13      Y coordinate potentiometer      (Joy B)
14      button 2                        (Joy B)
15      MIDI RXD                        (midi -> computer)

Also check out: http://www.instructables.com/id/Computerized-video-security-setup/

Step 1 How to connect a pir sensor.

Movement means trouble at off hours, so you need a way to detect movement.

Needed:
5v pir sensor Be sure and check the pin outs as not all are the same. (Ours was a R/S 276-0033 aka Parallax 555-28027)
Use http://www.ladyada.net/learn/sensors/pir.html as a guide to test your sensor.
npn transistor 2n2222 or 2n3904.
5 volt relay.
10k ohm resistor.
1n4002 diode.
Wire.

Note the forth picture is for those who like a little more safety in the circuit.
--------------------------------------------------------------------------------------
Example code:
getpirdata:
r = STRIG(2)
SELECT CASE r
        CASE -1
                flag = 1
        CASE 0
                flag = 2
        CASE ELSE
                GOSUB errornotice
END SELECT
RETURN
--------------------------------------------------------------------------------------

          Joystick B             ____      Joystick A
                                /    |
                              /      |
                            /        |
                          /       1  |
                         |        O------- 5 Volt
              5 Volt -------O        |
                         |  9     2  |
                         |        O------- Button 1
            Button 3 -------O        |
                         |  10    3  |
                         |        O------- Resistor X-axis (joystick(1))
     Resistor X-axis -------O        |
      (joystick(2))      |  11    4  |
                         |        O------- Ground
            MIDI TXD -------O        |
                         |  12    5  |
                         |        O------- Ground
     Resistor Y-axis -------O        |
       (joystick(2))     |  13    6  |
                         |        O------- Resistor Y-axis (joystick(1))
            Button 4 -------O        |
                         |  14    7  |
                         |        O------- Button 2
            MIDI RXD -------O        |
                         |  15    8  |
                         |        O------- 5 Volt
                          \          |
                            \        |
                              \      |
                                \    |
                                  \__|

Digital
pin  2 = Button 1 = Strig(0)
pin  7 = Button 2 = Strig(1)
pin 10 = Button 3 = Strig(2)
pin 14 = Button 4 = Strig(3)

Analog
pin      3  =  Resistor =  Stick(0)
pin      6  =  Resistor =  Stick(1)
pin    11  =  Resistor =  Stick(2)
pin    13  =  Resistor =  Stick(3)

Comments

[rch]

Good use of ASCII graphics. It looks like you have put a lot of hard work into your instructable.

[Computothought]

Still have a bit of tweaking to do, but I have updated this instructable a bit.