Tronic Test Point

This image clearly shows the main components of a car's disc brake system and how they are assembled. It also shows the components that mount on the wheel, such as brake pads, calipers, rotors, as well as other essential components such as the master cylinder, brake lines, and ABS system. This is a very valuable note for anyone interested in automotive technology.

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This image clearly shows the internal and external parts of a Differential Pressure Transmitter (DP Transmitter), which is widely used in the industrial field.

Starting from the pressure measuring assembly at the bottom, all the essential components such as the main cover (Housing), electronic circuits (PORT board), LCD screen and the wire connecting part (Terminal block) are named separately. This is a very valuable note for those who are learning about Industrial Automation and Instrumentation Technology.

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This diagram shows the wiring connections of a motor controller used for electric bicycles (E-bikes) or electric scooters (E-scooters).

Here, the main battery power supply (Battery +, -), motor lines (Motor lines), throttle (Throttle), brake, as well as 13 clearly labeled wires and connectors that need to be connected to various devices related to the anti-theft system. This is a very practical diagram for someone who is repairing an E-bike or doing a DIY project to identify the correct places to connect the wires.

This circuit consists of two main stages: Stage 1 - Buffered Differential Gain Stage: Op-Amps A1 and A2 provide a high input impedance to the circuit, and the gain of this stage can be easily controlled by changing the resistor $R_G$. Stage 2 - Difference Amplifier: This section, which operates through the Op-Amp A3, only amplifies the difference between the two input signals (Vin1 and Vin2). It also removes unwanted noise signals common to both (Common-Mode Rejection).

This is a technical diagram of a starter motor in a car. It explains the internal workings of this motor, which provides the initial power needed to start the engine. The main components such as the solenoid, armature, field windings, and drive gear are labeled here. This is a very useful diagram for those learning about how an engine works.

The special thing about this is that it is presented very clearly in 3 parts:

Top part: Shows how a 100nF ceramic capacitor and a 2.2kΩ resistor are physically connected in parallel.

Middle part: The standard electrical diagram of the circuit (Schematic Diagram). Here, 2 BC547 transistors, a 220µH inductor, and a switch are used.

Bottom part: A practical diagram (Pictorial diagram) that shows how the devices should be physically connected in a way that is easy to understand even for beginners who have difficulty reading circuit diagrams.

This is a great example for those who are learning electronics from scratch to identify basic devices and to practically design a simple circuit.

Relay Coil Flyback Voltage Protection for Transistors

When a relay coil is de-energized, the stored magnetic energy in it generates a high voltage spike (flyback voltage). This can damage delicate transistors such as the 2N3904. This description shows three common methods (diode, diode+resistor, diode+zener), explains what flyback voltage is and why it occurs, and the advantages and disadvantages of each method.