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21.M015N-DC/DC Converter, adjustable
22.M229-Marten Defence for Motor Vehicles, battery-operated with positive-negative contact plates
23.L100-Conductive Silver
24.M012-Power Control 110 / 240 V/AC, 1200 VA
25.M122-Twilight switch 12 V/DC
26.M158-Water Switch 9 - 12 V/DC
27.M173-Soil Humidity sensor 12 V/DC
28.M113A-Time switch 12 - 15 V/DC
29.M062-Mini-Fence-High-Voltage Generator
30.Z100-Marten Repellent Spray
31.M168-Overvoltage Protection 12 V/DC
32.M071N-Ultrasonic vermin repeller
33.FG016-Exhaust Control
34.M172N-Bicycle Power Charge Controller USB
35.M094N-Marten repeller
36.M161-Ultrasonic Power Cannon
37.M174-Solar charging regulator Dual 16 A
38.M152K-Rain Sensor, Capacitive
39.FG025SET-Marten and Raccoon Repeller Electric Fence
40.M169A-Temperature switch-thermostat 12 V/DC
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Soldering

Soldering course - page 13

Picture of a cold soldering joint

The soldering joint on the far right is clearly a so called "cold soldering joint". (arrow) . The solder applied only to the wire not the land. The difference to the surrounding soldering joints is obvious.

REASON: Only the wire was heated; not the land.

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soldering presentation shortform

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