Mutchus

Small circuit to run a LED on line voltage (English) This little circuit allows to connect a LED to line voltage. A LED can not handle with 230V AC and needs a current which is limted to ca. 15mA. The first issue is simply solved with a diode which eliminates the voltage in reverse-biasing. The current is limited by the combination of the resistor and capacitor. Used at AC capacitors work as frequency dependent resistors. You can simply calculate the capacitive resistance of the capacitor by the following formula: Based on a frequency of 50Hz and a capacity of 220nF you get a reactance of ca. 16kΩ. This is just perfect for a LED . The resistor prevents that the capacitor does not charge that abruptly. Hinweis Attention. This circuit works with life threatening line voltage. All parts of this circuit are connected to the grid! You have to make sure that it is not possible to touch any parts of the circuit at any time. You have to unplug the circuit everytime you want to check it. Part...

1.0               Introduction We are all mandated to ensure that the place in which we work is free from dangers associated with electricity, machines, materials and the tools we use. We cannot confidently perform our duties if we know that we are not safe. Therefore, this implies that we are all managers not only committed to support safety, but we must insist on electricity safety rules at school performance in a manner that is clearly understood and echoed at all cadres of life. 1.1       General Safety Rules Accidents do not just occur; they are caused. To prevent them, always: 1. think before you act; if you are not certain please seek assistance; 2. concentrate on your work; 3. be mindful of your safety and the safety of others; 4. dress properly for the job to be done; 5. poise properly when carrying out a particular activity; 6. no horse-playing around in the place of work; 7. ...

Small circuit to run a LED on line voltage (English) This little circuit allows to connect a LED to line voltage. A LED can not handle with 230V AC and needs a current which is limted to ca. 15mA. The first issue is simply solved with a diode which eliminates the voltage in reverse-biasing. The current is limited by the combination of the resistor and capacitor. Used at AC capacitors work as frequency dependent resistors. You can simply calculate the capacitive resistance of the capacitor by the following formula: Based on a frequency of 50Hz and a capacity of 220nF you get a reactance of ca. 16kΩ. This is just perfect for a LED . The resistor prevents that the capacitor does not charge that abruptly. Hinweis Attention. This circuit works with life threatening line voltage. All parts of this circuit are connected to the grid! You have to make sure that it is not possible to touch any parts of the circuit at any time. You have to unplug the circuit everytime you want to check it. Part...