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21.L010-Piezo Loudspeaker
22.Z100-Marten Repellent Spray
23.M062-Mini-Fence-High-Voltage Generator
24.M229-Marten Defence for Motor Vehicles, battery-operated with positive-negative contact plates
25.L100-Conductive Silver
26.G023N-Case With Fastening Straps approx. 74 x 51 x 28 mm
27.A001-Bending device
28.M012-Power Control 110 / 240 V/AC, 1200 VA
30.M161-Ultrasonic Power Cannon
31.M122-Twilight switch 12 V/DC
32.M071N-Ultrasonic vermin repeller
33.M169A-Temperature switch-thermostat 12 V/DC
34.M128N-HF Detector (Mini Spy Finder)
35.M240-Power Control 230 V/AC, 10 A, Multifunction
36.B093-Electronic dice
37.M048N-Ultrasonic Generator
38.B156N-FM receiver
39.M091A-Phase Coupler for Power Line Products
40.M197-Twilight Switch 12 - 28 V/DC
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Soldering course - page 15

Picture of a tin-bridge

This picture shows another frequent mistake - a tin-bridge ("short circuit"). (black frame)
When the gap between two lands is pretty narrow the solder may link those two as can be seen here.

SOLUTION:Just apply as much solder as necessary to cover the land and the wire.

NOTE: It is very important to hold the soldering joint in such way to head just one land at a time.

Ursache: Lötzinn wurde zu lange erwärmt, dadurch ist das Flußmittel im Lot verdampft und die Lötstelle geht keine Verbindung mit dem Zinn mehr ein.

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soldering presentation shortform

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