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====== ADC Switchs ======
There are times when you need several switches, all pressed at different times, and you dont want to use several inputs to achieve this.  I have made 2 varients, a switch panel (with eight switches) and a 2 way switch (joystick axis for example).

Using the following diagram, each of the buttons will set the adc pin to a voltage via the resistor divider. It will also allow for an error, if the pin goes to 5v or 0v that is a fault condition.

The lower the button number, or lower ADC value will take priority over the higher number switches.
==== 8 buttons ====

{{ :picaxe:picaxe-adc.png?direct |}}

The ADC Values are as follows
  * 0-39 fault, 244-255 fault.
  * 231 - 243 idle (no switch pushed)
  * 40 - 64 button 1
  * 65 - 89 button 2
  * 90 - 114 button 3
  * 115 - 140 button 4
  * 141 - 166 button 5
  * 167 - 190 button 6
  * 191 - 205 button 7
  * 206 - 230 button 8

of course it is best to measure with debug when playing with the buttons.

==== 2 buttons ====
{{ :picaxe:picaxe-adc-2-button.png?direct |}}

The ADC values are as follows
  * 0 - 29, 244 - 255 fault
  * 201 - 243 idle (no button pressed)
  * 30 - 111 button 1
  * 112 - 200 button 2.

Again measure with debug to ensure accuracy

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