GENERATIONS

 This is a touch switch using only a mosfet. The circular object is an LED and the box is a resistor . Chose a resistor that will protect the LED. The simple principle of a mosfet is that power flows from the source(S) to the drain(D) and the gate(G) is used to regulate the voltage that flows between the S and D. Coz a mosfet has a capacitor , this means that it has more voltage than a normal transistor . When you close the G by touching it, this closes the gap between S and D hence completing the circuit. I think when you touch the off wire you are kind of creating a short circuit .

      This is a experimental project. And am using NOT gate. The main point is to do away with mechanical switch. Let me explain. After building the circuit , first apply power first to A and than  B . When you apply power on A first, the output of A (Y1) will output power which will in turn power Y2 .  When Y2 is on, Y3 will not be on. Which means that at first , the LOAD will not have power. Simple reminder. the line running from Y3 to the OFF circuit is an intersection of  the line which if from the LOAD to the ON  or Y4 section . So when you apply voltage to to Y4 ( apply power once and release. Don't gave it power constantly ) , This will cancel power to Y1 and hence Y2 will not have power which means that Y3 will output power , which in turn powers the LOAD . Due to the joint. Power will still flow back to the ON  or Y4 section , meaning that Y4 will still have power which means that Y1 is off or 0. So when you apply v...

  If you want to implement a delay circuit in your project, this is the diagram.  There will be a delay when power is applied to the positive to the load and when you take off power there will be a delay for the load to turn off. This effect is brought about by the capacitor and the resistor. When you turn off power the capacitor will still provide power to the load while the resistor is delay the discharge of the capacitor

This is a logic gate. We use one transistor (NPN) .  And the boxes you see are resisters . It really doesn't matter which values they are. A NOT gate is also called an inverter coz it works in opposite with it's input.  When there is an in put on A , Y will have no out put. And when there is no input on A , then Y will have an output. How to use it. Connect a power source (positive) of your value on the + and (negative) to the earth symbol. Without connecting a positive of the same power source on A , Y will have an output.  When you connect the same positive of the power source to A , Y will have no power.