Component tester schematics

Build your own LED tester with this easy schematic using an opamp (TL081) to precisely control current flow from 0 to 30mA, ideal for testing all standard LEDs. Achieve accurate current adjustments and monitor voltage with a 5V power supply.... [read more]

Unlock the secrets of LEDs with this essential testing circuit. Discover how to confidently assess your components, ensuring optimal brightness and pinpointing defective LEDs, even in the dark. Build your LED tester and illuminate your projects with precision and reliability.... [read more]

Build a precision continuity tester and master the art of diagnosing electrical connections with this innovative DIY circuit. This powerful tool, based on an op-amp comparator, lets you easily identify good and bad contacts, optimizing audio installations and ensuring flawless performance in car stereos, public address systems, and beyond.... [read more]

Measure zener diode voltage accurately with this reliable circuit. This 25Volt circuit uses a half-wave rectifier and a current limiter to determine the zener voltage, providing precise measurements and ensuring stable operation.... [read more]

Build your own Zener Diode Tester with a powerful 555 Timer circuit, generating up to 120 volts AC to rigorously test zener diodes from 1 to 2mA.... [read more]

Build your own XTal oscillator circuit and ignite a 100KHz to 30MHz signal with this simple tester.... [read more]

Uncover the secrets of transistor testing with this ingenious circuit. Precisely measure transistor performance down to 40 ohms and confidently diagnose issues in amplifier circuits. This 12Hz circuit utilizes a 555 timer and flip-flop to illuminate LEDs, revealing whether transistors are good or faulty – a powerful tool for any electronics enthusiast.... [read more]

Build a powerful astable multivibrator circuit to effectively test N-mosfets like the IRF830 and unlock the potential of your electronics projects.... [read more]

Test quartz resonators from 32kHz to 24MHz with this innovative circuit. Verify resonator performance using LED and acoustic signals, utilizing a BC547C transistor and a versatile two-positional switch for precise frequency adjustments. Build your own frequency testing solution today!... [read more]

Build a powerful diode tester with the PIC 16F84 and unlock limitless possibilities for your projects. This innovative circuit utilizes a clear and intuitive design to accurately test diodes, providing a robust solution for your engineering endeavors.... [read more]