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Set of used zener diode on a white background

Close-up showing resistors on a power board

Measuring electric current through a resistor with an ammetter. 490 milliamperes of current flows through the resistor.Focused on resistor.

Unit control panel of electronic equipment, close-up

Closeup of electronic components with germanium crystal and metal wire semiconductor junction in striped tube on a PCB detail

Miniature high-frequency adapter with two yellow coaxial connectors on edges on a gray background, close-up in selective focus

Circuit board

Selective focus view of electronic circuit with cable and resistor on blurred background. Macro photography.

Magnet is pushed into a copper coil, inducing an electrical current through induction

power transistors isolated on a white background

Computer motherboard - aluminum heatsink

A closeup shot of an electronic circuit board

Electrical control panel. Industrial electrical control panel

Obsolete red power carbon or green metallized resistors and black opto-isolators in rows. E-waste disposal. Eco

Power board electricity inductors close-up

Evaluation PCB board with connected cables ready for radio frequency testing

Close-up of vintage electronic components including vacuum tubes and a transformer on a metal chassis.

Simple voltage regulator circuit board. 5 Volts DC adapter powered by generic 7805 IC.

Various radiolamps on a laptop background

Miniature high-frequency adapter with two yellow coaxial connectors on edges on a gray background, close-up in selective focus

electric circuit

Close-up of toroidal coils, electrolytic capacitors or resistor trimmer and screw terminals on green PCB

amplifier mini in clear case

Male BNC plugs, mounted on an electronic board, on a rusted blue background

Close-up of electronic components on a circuit board

Physics experiment in electrical lab at school. Vintage study of electric current.

Old style meter and computer parts. STEM

a row of blue condenser electrolyte that becomes a filter in the AC to DC voltage converter circuit. the circuit also has a regulator IC, LEDs, wires socket, and a transformer

RF testing instruments and equipment

Free Images: "bestof:Tunnel diode amplifier.svg tunnel diode can amplify a signal using negative differential resistance The DC voltage V<sub>b</sub> biases the tunnel diode TD into"

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