adding bidirecitonal toggle

modules/input/bidirectional-toggle-switch/index.md

@@ -1,4 +1,39 @@
-
-## Gallery
+# Bidirectional Toggle Switch
 
 ![A bidirectional toggle switch]({{site.baseurl}}/assets/modules/bidirectional-toggle-switch.jpg)
+
+A DPDT (Dual Pole Dual Throw) Toggle Switch can be used to create [a simple power inverter](http://www.robotroom.com/DPDT-Bidirectional-Motor-Switch.html) to control a motor forward and backward.
+
+## Material
+
+* a DPDT toggle switch, preferrably ON-OFF-ON
+* 6 paper clips
+* 1 straw
+
+## Make
+
+* Find a ON-OFF-ON DPDT toggle switch. You will see 6 connectors a the bottom.
+
+![A bidirectional toggle switch]({{site.baseurl}}/assets/modules/input/bidirectional-toggle-switch/make1.jpg)
+
+* Open up the paper clip as follows
+
+![A bent paper clip]({{site.baseurl}}/assets/modules/input/bidirectional-toggle-switch/make2.jpg)
+
+* Attach 2 paper clips to one of the corder connector.
+
+![Two paper clips]({{site.baseurl}}/assets/modules/input/bidirectional-toggle-switch/make3.jpg)
+
+* Slip a piece of straw and connect one of the paper clip to the opposite terminal
+
+![Diagonal connection]({{site.baseurl}}/assets/modules/input/bidirectional-toggle-switch/make4.jpg)
+
+* Attach two other paper clips to the other corner and connect one of them to the opposite terminal (don't forget the straw).
+
+![Both connected]({{site.baseurl}}/assets/modules/input/bidirectional-toggle-switch/make5.jpg)
+
+* Add two more paper clips on the central connectors
+
+* Connect all paper clips to binder clips. The center clips and border clips should be connected in separate pairs.
+
+![A bidirectional toggle switch]({{site.baseurl}}/assets/modules/input/bidirectional-toggle-switch/demo.jpg)

modules/input/index.md

@@ -5,7 +5,8 @@
 Input modules allow open or close circuits, change resistance and more.
 
 * [Switch]({{site.baseurl}}/modules/input/switch)
-* [Toggle light switch]({{site.baseurl}}/modules/input/toggle-light-switch)
+* [Toggle switch]({{site.baseurl}}/modules/input/toggle-switch)
+* [Bidirectional Toggle Switch]({{site.baseurl}}/modules/input/bidirectional-toggle-switch)
 * [Push button]({{site.baseurl}}/modules/input/push-button)
 * [Potentiometer]({{site.baseurl}}/modules/input/potentiometer)
 * [LED optoisolator]({{site.baseurl}}/modules/input/led-optoisolator)

reference/index.md

@@ -18,4 +18,6 @@
 
 [T³: Using LEDs as Light Sensors](https://www.sparkfun.com/news/2161)
 
-[Relay switch circuit](http://www.electronics-tutorials.ws/blog/relay-switch-circuit.html)
+[Relay switch circuit](http://www.electronics-tutorials.ws/blog/relay-switch-circuit.html)
+
+[Simplest Method to Make a Motor Turn Off, Turn On, Go Forwards, and Go Backwards](http://www.robotroom.com/DPDT-Bidirectional-Motor-Switch.html)