Yoctopuce electrical components Germany Yoctopuce model Yoctopuce price

Yoctopuce electrical components are a new type of contactless switching device composed entirely of solid-state electronic components. It utilizes the switching characteristics of electronic components (such as switching transistors, triacs, and other semiconductor devices) to achieve contactless, spark-free connection and disconnection of circuits, hence it is also called a "contactless switch." A solid-state relay is a four-terminal active device, where two terminals are input control terminals and the other two are output controlled terminals. It has both amplification drive and isolation functions, making it very suitable for driving high-power switching actuators. Compared to electromagnetic relays, it offers higher reliability, is contactless, has a long service life, fast speed, and low external interference, and has been widely used [1].

Yoctopuce electrical component types

For different application scenarios, the purpose of applying varistors varies, and the voltage/current applied to the varistor should not be the same, so the requirements for varistors also differ. Paying attention to these differences is crucial for correct usage. Based on the purpose of use, varistors can be divided into two main categories: (1) protection varistors and (2) circuit function varistors. Protection resistors: (1) Distinguish between varistors for power supply protection and varistors for signal line or data line protection, as they must meet different technical standard requirements. (2) Based on the different continuous operating voltages applied to the varistor, varistors across power lines can be classified into AC type or DC type, and the aging characteristics of varistors under these two voltage stresses differ. (3) Based on the different abnormal overvoltage characteristics withstand by varistors, varistors can be classified into three types: surge suppression type, high-power type, and high-energy type. 1. Surge suppression varistors refer to varistors used to suppress transient overvoltages such as lightning overvoltage and switching overvoltage. The occurrence of this transient overvoltage is random and non-periodic, and the peak current and voltage may be very high. The vast majority of varistors belong to this category. 2. High-power varistors refer to varistors used to absorb continuous pulse groups that appear periodically, such as varistors connected in parallel to switching power supply converters. Here, the impact voltage appears periodically, and the period is known. The energy value can generally be calculated. Although the peak voltage is not large, due to the high frequency of occurrence, the average power is quite significant. 3. High-energy varistors refer to varistors used to absorb magnetic energy in large inductive coils such as generator excitation coils and lifting electromagnet coils. For such applications, the main technical indicator is energy absorption capacity. The protective function of varistors can be repeated multiple times in most application scenarios, but sometimes they are made into "one-time" protective devices like current fuses. For example, varistors with short-circuit contacts connected in parallel to the loads of certain current transformers.

Yoctopuce electrical component applications

The structure and characteristics of Schottky diodes make them suitable for high-frequency rectification in low-voltage, high-current output applications. They are used for detection and mixing at very high frequencies (such as X band, C band, S band, and Ku band) and as clamps in high-speed logic circuits. In addition to the characteristic parameters of ordinary PN junction diodes, the electrical parameters of Schottky diodes used for detection and mixing include intermediate frequency impedance, voltage standing wave ratio, and noise figure. Schottky barrier diodes are a type of low-power, ultra-high-speed semiconductor device. The most notable feature is the extremely short reverse recovery time (which can be as low as a few nanoseconds). They are mostly used as high-frequency, low-voltage, high-current rectifier diodes, freewheeling diodes, and protection diodes. They are also used as rectifier diodes and small-signal detection diodes in circuits such as microwave communication. They are relatively common in communication power supplies, inverters, etc. A typical application is in the switching circuit of bipolar junction transistors BJT, where connecting a Shockley diode to the BJT clamps it, ensuring that the transistor is actually close to the cutoff state when in the conduction state, thereby improving the switching speed of the transistor. The biggest feature of Schottky diodes is the relatively small forward voltage drop. Under the same current conditions, its forward voltage drop is much smaller. Additionally, its recovery time is short. It also has some disadvantages: relatively low voltage resistance and slightly larger leakage current. Comprehensive consideration is required during selection.

Yoctopuce electrical component principles

Hall voltage changes with the strength of the magnetic field; the stronger the magnetic field, the higher the voltage, and the weaker the magnetic field, the lower the voltage. The Hall voltage value is very small, typically only a few millivolts, but after being amplified by an amplifier in an integrated circuit, the voltage can be amplified enough to output a stronger signal. To make the Hall integrated circuit act as a sensor, mechanical methods are needed to change the magnetic field strength. Using a rotating impeller as a switch to control magnetic flux, when the impeller blades are in the air gap between the magnet and the Hall integrated circuit, the magnetic field deviates from the integrated chip, and the Hall voltage disappears. In this way, the change in the output voltage of the Hall integrated circuit can indicate a certain position of the impeller drive shaft. Utilizing this working principle, the Hall integrated circuit chip can be used as an ignition timing sensor. Hall effect sensors belong to passive sensors; they require an external power source to work. This characteristic enables them to detect low-speed operation conditions.

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