Introducción a el diseño proceso de el multiusos electroscopio pluma pluma.
Diseño a multiusos eléctrico pluma, cuyo apariencia es el igual as eso de ordinario eléctrico medidor plumas. It can not only judge si electrical appliances are charged, but also distinguish the polarity and quality of diodes and triodes, judge si condensadores son bueno o malo, measure si el circuito es on or off, and si the measuring equipment is Leakage, sensing electricity, etc.
1. Producción materiales
1. Tres npn bajo-potencia triodos, dos botón baterías, uno 100Ω resistencia, uno diodo emisor de luz, y uno ordinario prueba pluma.
2. Herramientas, eléctrico soldadura hierro, pinzas, diagonal alicates, multímetro.
2. Producción método
1. Identificar componentes
(1) El triodo (Figura 2) has 3 pines, which son emisor (e), base (b) and collector (c). Hay son dos tipos de triodo: npn tipo y npn tipo. Ellos tienen funciones similares pero la corriente en la dirección opuesta .
(2) El diodo emisor de luz (Figura 3) tiene sólo 2 pines, que son positivo y negativo. Generalmente, el más largo uno es el positivo polo y el otro es el negativo polo. It can be reversed in the circuit.
2. Acortar los leads of all components, scrape off the oxide layer, and weld them as tightly as possible according to Figure 4.
3. Put the welded circuit into the electric pen, pay attention to make the A terminal of the resistor contact with the metal part of the front end of the electric pen, and the positive pole of the button battery pack should be connected with the metal screw at the tail of the electric pen through a a spring.
3. Aprendizaje a uso
1. Electricidad medición por inducción método
Hold the electric pen and touch the outer skin of the mains line (not the metal part of the wire) with the front end. If the LED is on, it means that the contact is the phase wire (live wire), else it is the neutral wire (ground wire). If varios cables are not bright after testing, it means there is no electricity.
2. Identificar diodos y triodos.
Touch one pole of the diode with one hand, and touch the other pole of the diode with the other hand. If the light-emitting diode is on, it means that the tip of the pen is touching the negative pole; if it is not lit, the tip of the pen is touching the positive pole. Then reverse the two pins and try again. If the two measurements are not bright, it means that the diode is broken. The method of measuring the triode is similar to this, it can be regarded as two diodes connected together.
3. Measure the continuity of the line and whether there is leakage
On the premise that the line is not connected to the power supply, touch one end of the line with an electric pen with one hand, and pinch the other end of the line with the other hand. The light-emitting diode lights up to indicate that it is connected, otherwise it is not connected. The line is connected to the mains, hold the electric pen, touch the electrical shell, and the light-emitting diode lights up to indicate leakage.
