This is continue of part one. Following advises are for how to solder SMD parts with improved technology.
Oven isolation

As isolation material there can glass insulation be used. In this case glass insulation was packed in aluminum foil:

Inspected improvement in heating speed:

0.95% without isolation;

1.50% with isolation only inside oven;

1.72% full isolation.

Soldering SMD parts isn’t hard task and there are many methods of doing this. Lets go through several SMD soldering methods and examples.
Method 1
For this you will need:

Good eyes or magnifying glass. Better one and another;

Soldering iron with small tip ~10W;

solder wire with diameter about 0.6mm

Steps to follow:

cut solder wire in pieces in length of [...]

The circuit of this Infrared(IR) detector circuit is a simple light relay which triggers when infrared light is applied to phototransistor Q1. This device can be used in control systems. When infrared light is OFF, Q1 transistor and relay K1 are normally closed.

 
When IR diode is transmitting IR light phototransistor Q1 opens and thus relay [...]

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Who has a car know that smal scratch may cause a rusting which will expand even under painted areas. And fight rusting id pretty hard tas. And so there are lots of methods that car keepers using. Ones are using anti-rust coating… but it has shortcomings – succes depends on how good it have been [...]

Those who work with microcontrollers probably know about data buses. Only one device(memory, peripherals), that are connected to bus can work at one moment. So only one unit can have direct connection to bus besides CPU which usually is a host. So decoding circuit determines the desired unit and connects it to bus. Other devices [...]

Gray code is well known and widely used in angular movement systems where angular positions has to be known. Gray code encoder can be constructed pretty easily by masked wheel where tracks are read with photocells.

 
Did you look at the picture and thought for yourself that gray code is same binary code. Well no… main [...]