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31.M229-Marten Defence for Motor Vehicles, battery-operated with positive-negative contact plates
32.M240-Regulador de potencia 230 V/AC, 10 A, multifunctión
33.M069N-Repelente de topos y roedores subterráneos
34.M197-Interruptor crepuscular 12 - 28 V/DC
35.M048N-Generador de ultrasonidos
36.M091A-Acoplador de fases para productos Powerline
37.E003-Placa experimental – retículo de lineas
38.A001-Dispositivo para curvar
39.M071N-Ahuyentador de bichos ultrasónico
40.M172N-Power regulador de carga USB para bicicletas
41.Z100-Ahuyentador de martas en espray
42.M169A-Termostato automático-termostato 12 V/DC
43.B156N-Receptor de FM
44.M034N-Amplificador Universal 40 vatios
45.G026N-Caja de plástico, negra aprox. 72 x 50 x 28 mm
46.M122-Interruptor crepuscular 12 V/DC
47.M032N-Amplificador universal 12 W
48.S093-LED Set Creativo
49.M113A-Interruptor horario 12 - 15 V/DC
50.M101A-Desencalante
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Soldering

Soldering course - page 14

Picture of a cold soldering joint and a poor connection

In this picture you may see a "cold soldering joint" (black circle) and a poor connection between wire and land (white circle).

REASON: The solder was heated too long. Therefore the flux filling of the solder vaporized and the solder cannot connect with the land.

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soldering presentation shortform

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