乾電池1本から100Vを作る

Summary

The video demonstrates boosting the voltage of a single 1.5V AA battery to over 100V using a cascade connection of homemade boost converter circuits. It explains the operating principles of boost converters, shows the process of assembling the boards and components, and tests the high voltage output. Despite voltage dropping under load, it succeeds in producing 156V from the battery. The presenter reflects on design improvements for stability, but is pleased to prove the bootstrap concept for now.

Takeaways

• 😀 Uses a boost converter circuit to increase 1.5V AA battery voltage to 100V
• 🔋 Connects multiple boost converter modules in series to further increase voltage
• ⚡ Shorting the high voltage with a graphite pencil lead creates sparks
• 🔬 Explains the principle of boost converter operation and energy transfer
• 🤔 Boosting to 100V from 1 AA battery alone causes issues like voltage drop
• 📈 Adding more batteries in parallel can help increase boosted voltage
• 🛠 Creates custom PCB and hand assembles the circuit components
• 📺 Overview of DigiKey's new YouTube series on vector analysis
• 💡 Suggests applications like corporate PR, factory tours, recruitment
• 🤝 Offers various video production services to potential clients

Q & A

What circuit does the video use to boost the voltage from a 1.5V battery?

The video uses a boost converter circuit consisting of an inductor, switch, diode, and capacitor to boost the voltage from the 1.5V battery.

How does the boost converter work to increase the voltage?

It works by storing energy in the inductor when the switch is closed and then transferring that energy to the capacitor when the switch is opened, thereby increasing the voltage across the capacitor.

Why was it difficult to directly boost the voltage to 100V from one 1.5V battery?

The high current required to boost to 100V would cause too much voltage drop across the internal resistance of a single 1.5V battery, reducing efficiency. Also the inductor may overheat.

How did the video creator finally achieve a 100V output?

By using a Murata module to boost the 1.5V battery voltage to 5V to supply the MOSFET control circuit, and then connecting multiple boost converter modules in series to incrementally step up the voltage.

What were some reasons the output voltage dropped significantly under load?

Lack of voltage feedback control, change in converter operating mode affecting boost ratio, and battery internal resistance voltage drop under the high load current.

How could the output voltage under load be improved?

Using more batteries in parallel to supply more current, adding more converter modules in series, and implementing voltage feedback control.

What safety precautions were taken with the high voltage circuit?

An ON/OFF switch, insulating gloves when handling it, checking for sparks across the output terminals.

What was the purpose of showing the high voltage short circuit spark?

To demonstrate the higher power capability compared to a normal 1.5V battery when drawing significant load current.

What was the sponsor DigiKey promoting?

DigiKey was promoting their Japanese YouTube channel and a new video series explaining vector analysis.

What products were advertised at the end of the video?

Breadboard PCBs and pre-wired LED products made by the video creator Ichiken were advertised.