Component: Switch (Controls)

From Flowcode Help
Revision as of 09:10, 17 February 2022 by MartinW (talk | contribs) (→‎Examples)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigationJump to search
Author Steve Tandy
Version 1.0
Category Controls


Switch component

A 2d switch component.

Component Pack

FREE

Detailed description

No detailed description exists yet for this component

Examples

Here is an example Flowcode program to read the value of a switch. FC6 Icon.png Switch

Here is a schematic of how to connect a basic switch to a microcontroller pin.

Switchschematic.jpg

The active high circuit will pass a logical 0 to the input pin when the switch is not pressed and a logical 1 when the switch is pressed.

The active low circuit will pass a logical 1 to the input pin when the switch is not pressed and a logical 0 when the switch is pressed.


There are some differences depending on the type of switch you have, the above states assume a generic push to make type switch, however a push to break type switch would have reversed logic and a toggle switch can work well with either setup.


The resistors are required for correct operation because when a microcontroller's input pin is essentially connected to nothing it will pick up noise in the environment and provide inconsistent readings. This state is referred to as floating i.e. the pin is floating. To test this remove the resistors (if possible) and touch the unconnected pin with your finger the output LED from the example file above will toggle on and off at high speed.


Any values of resistor can be used but it is important to keep the smaller resistor at least 10X smaller then the larger resistor to ensure that the pressed state provides at least 0.91% of the required pressed state voltage. For example a active high switch circuit using 1K and 10K resistors should pull up to about 4.54V when the switch is pressed.

(5V / 11K) * 10K = 4.54545V

Downloadable macro reference

Fc9-comp-macro.png GetState
Reads the state of the switch (true = on, false = off) 
Fc9-bool-icon.png - BOOL Return


Fc9-comp-macro.png SetState
Sets the switch to be on or off. 
Fc9-bool-icon.png - BOOL bState
The new state of the switch (true=on, false=off) 
Fc9-void-icon.png - VOID Return



Property reference

Fc9-prop-icon.png Properties
Fc9-type-12-icon.png State
 
Fc9-type-12-icon.png Style
 
Fc9-type-12-icon.png Type
 
Fc9-type-10-icon.png On Label
 
Fc9-type-10-icon.png Off Label
 
Fc9-type-2-icon.png Background Colour
 
Fc9-conn-icon.png Connections
Fc9-conn-icon.png Simulations