Videos

1570

Circuit Mini FM transmitter – video assembly instructions

Instructions, how to build a mini station from cheapest simplest components. Either frequency, modulation, FM (frequency modulation), sends the component values ​​at around 100 MHz Mini Transmitter Instruction Building a super spy bug transmitter.

The 20k resistors together with the resistance of the condenser microphone sets a voltage divider composed of the (dc) operating point of the transistor. Since the resistance of the microphone capsule to the beat changes of the sound waves, does this change and the operating point of the transistor, or in other words, the transistor amplifies the low-frequency voltage to the (electret) microphone comes in a common emitter circuit, the low-frequency signal is at the base and is amplified by the transistor.

Simultaneously, the transistor amplifies the RF signal but also in basic circuit. A small portion of the vibration of the oscillator circuit from the collector (amplifier output) on the 5.6 pF capacitor to the emitter (high-frequency amplifier input of the base) is fed back, the drive current Fliest from the emitter to the base and then 3.3 on the nF capacitor to ground. The capacitor on the basis of mass must be small enough that it does not hinder the low-frequency audio signal, but also large enough that the high-frequency, virtually unhindered tiles to ground. The 470 ohm resistor at the emitter stabilizes the operating point and sets the input resistance of the base circuit.

The whole thing is rather something like an emitter circuit audio amplifier circuit combined with a basic high-frequency amplifier with only one transistor.

1540

Soldering Tutorial Part 3 – Surface Mount – SMD Component

Part 3 of the hand soldering tutorial. This time Dave shows you how to drag solder and tack & reflow SMD components, and in particular 0.5mm fine pitch IC’s. Including solder paste and hot air.

1538

Soldering video Tutorial Part 2

Beginners guide to learning how to hand solder.

1536

Soldering Tutorial Part 1 – Tools

Dave takes you through everything you need to know to do good quality soldering.
Part 1 is all about the tools you might need.
A lot of this was already covered in general lab tools video.

1485

THE BEST Multimeter video tutorial (HD)

Afroman shows you what to look for in a multimeter, and how to use a multimeter to measure voltage, current, resistance and continuity.

1479

Video tutorial free – Resistor Color Codes

This video describes Resistor Color Codes and how to read them. It relates Resistor Color Codes to scientific numbers and engineering notation.

1477

Introduction to Breadboard (Protoboards), Part 2 of 2

This video continues part 1 by showing how a breadboard, also called a protoboard, is used to build electronic circuits without soldering, by guiding the student through 10 steps to build a blinking LED circuit based on the 555 IC timer chip. The circuit also needs 3 resistors, 1k, 4.7k, and 10k. It also requires a 10 uF electrolytic capacitor, an LED, some jumper wires, and a 6-volt battery or power supply.

Uses of Breadboard
A breadboard is used to make up temporary circuits for testing or to try out an idea. No soldering is required so it is easy to change connections and replace components. Parts will not be damaged so they will be available to re-use afterwards.
Almost all the Electronics Club projects started life on a breadboard to check that the circuit worked as intended.
The photograph shows a typical small breadboard which is suitable for beginners building simple circuits with one or two ICs (chips). Larger sizes are available and you may wish to buy one of these to start with.

1475

Introduction to Breadboard (Protoboards), Part 1 of 2

This video introduces the breadboard, also called a protoboard, used to build electronic circuits without soldering. The first part of this presentation describes the features of a breadboard.

A breadboard (protoboard) is a construction base for a one-of-a-kind electronic circuit, a prototype. In modern times the term is commonly used to refer to a particular type of breadboard, the solderless breadboard (plugboard).

Because the solderless breadboard does not require soldering, it is reusable. This makes it easy to use for creating temporary prototypes and experimenting with circuit design. Older breadboard types did not have this property. A stripboard (veroboard) and similar prototyping printed circuit boards, which are used to build permanent soldered prototypes or one-offs, cannot easily be reused. A variety of electronic systems may be prototyped by using breadboards, from small analog and digital circuits to complete central processing units (CPUs).

1442

Video DishPointer Pro + Android = satellite dish allignment

The way of finding the satellite when installing a satellite dish, using Samsung Galaxy S and DishPointer Pro application. The next generation satellite finder on Android phone. Point your cellphone anywhere towards the sky and all the satellite will appear on the screen.

1399

Vídeo tutorial Fun with ultracapacitors

I got hold of some 2600F capacitors that can dump hundreds of amps. Normally these are used in electric cars to handle sudden stops and starts. Instead, I use them to vaporize bits of metal, and show you the 3 most important capacitor equations along the way.

An electric double-layer capacitor (EDLC), also known as supercapacitor, supercondenser, pseudocapacitor, electrochemical double layer capacitor, or ultracapacitor, is an electrochemical capacitor with relatively high energy density. Compared to conventional electrolytic capacitors the energy density is typically on the order of hundreds of times greater . In comparison with conventional batteries or fuel cells, EDLCs also have a much higher power density.

A typical D-cell sized electrolytic capacitor displays capacitance in the range of tens of millifarads. The same size EDLC might reach several farads, an improvement of two orders of magnitude. EDLCs usually yield a lower working voltage; as of 2010 larger double-layer capacitors have capacities up to 5,000 farads.  Also in 2010, the highest available EDLC energy density is 30 Wh/kg (0.1 MJ/kg) (although 85 Wh/kg has been achieved at room temperature in the lab), lower than rapid-charging lithium-titanate batteries.

EDLCs have a variety of commercial applications, notably in “energy smoothing” and momentary-load devices. They have applications as energy-storage devices used in vehicles, and for smaller applications like home solar energy systems where extremely fast charging is a valuable feature.