How to make Smart Blind Stick with Arduino | Arduino Project CODE : // defines pins numbers const int trigPin = 9; const int echoPin = 10; const int buzzer = 11; const int ledPin = 13; // defines variables long duration; in…
In electrical work, what’s the point of a red wire if it has the same purpose as the black wire? Why not just have two black wires? You can. Nothing wrong with that. But it lets you keep them separate, is you choose to. For wiring an electrical cloth…
Why should one avoid right angles when drawing PCB traces? There are two reasons. One is historically right angles make an etch trap where the etchant works too hard and undercuts the inside corner making the trace thinner and more fragile. The othe…
Can I plug a 220 volts appliance to a 240 volts supply? ….. without damaging it! First of all you must realise that electric power supply voltages aren’t constant. They try to be constant but vary with load and spikes often happen in the system due to…
Could pointers in programming be compared to shortcuts? Pointers define an access mechanism. You might have a pointer which points to something else, then to another thing and down a path to what you want: a.b.c.d.e So you can pass around the pointe…
What's a C++ student's biggest weakness that holds him back? C++ is the student’s biggest weakness. C++ has taught the student old and primitive programming. The C++ student must grapple with a whole lot of issues, traps, flaws, and undefine…
