Fast Refix UsA Repair

Fast Refix UsA Repair One of Best

09/02/2026

Transformer made

09/02/2026

Carrying on with the daily routine.

⚡️Is your home circuit breaker constantly tripping? Find the leak in 4 steps! Check individual circuits → Unplug applian...
09/01/2026

⚡️Is your home circuit breaker constantly tripping? Find the leak in 4 steps! Check individual circuits → Unplug appliances → Check light wiring → Perform segmented testing. Remember these tips: Main circuit first, then branch circuits; Appliances first, then wiring; Easy circuits first, then difficult ones!

09/01/2026

Semi-automatic soldering machine welding LED strip wire harnesses

Simple DIY digital voltmeter circuit 📊 An 18650 battery and a 1k resistor are all you need to measure voltage. Electroni...
09/01/2026

Simple DIY digital voltmeter circuit 📊 An 18650 battery and a 1k resistor are all you need to measure voltage. Electronics enthusiasts can try it out!

Back in the day, countless audiophiles used it to DIY amplifiers. The "Foolproof 2100" was a staple in the DIY amplifier...
09/01/2026

Back in the day, countless audiophiles used it to DIY amplifiers. The "Foolproof 2100" was a staple in the DIY amplifier scene; did you ever play with it? Even if you didn't, you've probably heard of it—its advertisements were everywhere in the "Electronics Newspaper"! Produced by Dahua Electronics in the 1990s, it boasted 2*100W high power output. Haha, it was commonly known as a "foolproof" amplifier, featuring a thick-film module that required no adjustments, internal MOSFET outputs, built-in short-circuit and overheat protection, OCL circuitry, and direct speaker connection without the need for output capacitors. - Power Supply: DC ±15V～±32V, maximum ±34V - Rated Power: 50W per channel (8Ω) - Maximum Power: 100W per channel

18650 Lithium Battery to 1.5V Output Circuit 🔋 A simple step-down converter that transforms a 3.7V lithium battery into ...
09/01/2026

18650 Lithium Battery to 1.5V Output Circuit 🔋 A simple step-down converter that transforms a 3.7V lithium battery into a 1.5V power supply, replacing ordinary dry cell batteries.

The four wires inside the USB cable.
09/01/2026

The four wires inside the USB cable.

The differences between series, parallel, and series-parallel battery connections are easy to understand! ⚡ Four batteri...
09/01/2026

The differences between series, parallel, and series-parallel battery connections are easy to understand! ⚡ Four batteries connected differently result in completely different voltages and capacities. Those working with energy storage and batteries must be able to distinguish these connections to avoid damaging equipment.

08/31/2026

Copper wire welding of copper terminals; conversion of various terminal blocks from soldering to resistance welding;

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