In an article published in this section (Voices of the Beyond PN001E) we talk about the interesting subject which we describe the phenomenon of EVP (Electronic Voice Phenomenon) where using recorders of common tapes they registered voices of unknown nature, associated with paranormal phenomena. However, some restrictions are made on the use of digital recorders, being preferred the old ones with tapes which, however, are becoming more scarce. In this article we discuss this subject.
The relays are key devices in mechatronics projects, IoT, as shields for microcontrollers and a multitude of practical applications. We have seen the basis of its operation in another article on this site. Now, we go beyond with more details on the operation of this important component.
Can quantum physics explain paranormal phenomena and even our consciousness? Some interesting studies show that in the neurons there are structures which seem to follow patterns of interaction, not following the conventional explanations and are not very well explained. See in this article why there may be a very large relationship between quantum physics and some paranormal phenomena.
Bipolar transistors are the most important of the semiconductors devices. They are used in about all electronic equipment and in mechatronic projects/ They can be used either as switches than amplifiers. Transistors with large current capabilities are very important elements in mechatronic designs as the reader can evaluate by the informations given in this part.
Not only in purely mechatronic applications, but involving IoT, wearable and more, the solenoids are key components. How to choose a solenoid, how to understand their characteristics and what are the types of solenoids that there is the subject of this article, complemented by others on this site and author´s books.
ART278 treat relays deepening knowledge of these components and indicating its use in shields. We gave at the time many simple circuit for direct drive and drive by keys. This article deals drive stages with transistors and other components.
18 V x 1 A Power Supply (CB836E)
This power supply is not protected from shorts in the output. Output voltage is given by the...
100 V x 5 mA Voltage Regulator (CB835E)
This high voltage regulator uses only two passive components. The output is 100 V, but replacing...
Transistor Amplifier - TIP31 / 32 (CB1004E)
This circuit consists of a traditional version amplifier with complementary output transistors...
LM386 Amplifier with 741 Preamplifier (CB1003E)
This simple circuit of low power with an LM386 includes the highly sensitive audio preamplifier...
4093 Oscillator (MSB0125E)
This oscillator can run in frequencies up 10 MHz depending on the Power supply voltage. The 1 µF...
Decade Counter (MSB124E)
This one-digit counter is part f the samples bench of the MultiSIM in one of its versions. The...
Simple Timer Using the 555 (MSB123E)
This simple timer can be used in many applications such as egg timer. The LED glows up when S1 is...
Ultrasound Emitter (MSB122E)
The circuit shown by the figure below can produce signals in the range between 20 kHz and 30 kHz....