To make a remote operated switch, you need to understand following circuits. I recommend you to make these circuits before you try a remote operated switch. (more…)
components
An automatic dark sensor can be made using a PNP transistor(BC557). (more…)
How to use a preset? There are 3 pins/terminals on a preset. The maximum resistance that a preset can provide is written on it. If 100K is written on preset,.
A relay is an electrically operated switch. Current flowing through the coil of the relay creates a magnetic field which attracts a lever and changes the switch contacts. The coil current can be on or off so relays have two switch positions and they are double throw (changeover)...
[vc_row][vc_column][vc_column_text]To make an object counter we can use a simple dark detector circuit and a normal calculator. Pole and NO (Normally Open) terminals of a relay have to be connected.