Uploaded July 2026 | Updated September 2026, 2 weeks ago
USB inverter build, 5V to mains inverter, DIY inverter circuit and efficiency testing. I build a simple USB-powered inverter using a recycled phone charger transformer and compare its current consumption with the classic Jeanna's Light circuit.
Can a simple one-transistor USB inverter really match older high-efficiency inverter designs? In this video I dismantle a USB charger, reuse its transformer, build the inverter from scratch, test several different transistors and measure the actual current consumption while powering a mains LED night light.
Rather than simply showing that the circuit works, I focus on something rarely measured—the input current—and compare the results with my original Jeanna's Light inverter from 14 years ago.
If you enjoy practical electronics, transformer projects, inverter circuits, transistor experiments and energy efficiency testing, you'll find plenty of useful information here.
👍 If you enjoy practical electronics experiments, please Like, Subscribe and leave a comment about which transistor gave the best results.
Chapters
00:00 Jeanna's Light vs Modern USB Inverters
00:33 Building a USB Powered Inverter
01:20 Opening the USB Charger
02:11 Removing the Transformer
02:32 Circuit Diagram Explained
03:21 First Power-Up Test
04:30 Testing with C2898 Transistor
05:16 Testing a 2N3055
05:45 Testing a C4242
06:25 Variable Resistor Experiment
06:44 Reducing Current Consumption
07:30 Finding the Best Resistance
08:06 Final Results
#USBInverter #ElectronicsProjects #DIYElectronics
Enjoy my Playlists -
Wireless Electricity: youtube.com/watch?v=yYoYyuR1KuI&list=PLIhGrBMUdssWpFSLW1hznwNqXWpCxhDRQ
Electronics Projects: youtube.com/watch?v=F4nfaYkGvQI&list=PLIhGrBMUdssWLQWtW4dWWGgh25XG3HXek
Solar Projects: youtube.com/watch?v=nmKfxI4MTTs&list=PLIhGrBMUdssXu9Pmduvopm02_7IMz8d3M
Reviews: youtube.com/watch?v=8jAJysXXsw8&list=PLIhGrBMUdssUYzRgA1mrp18zwpTtClmov
💼 Business and reviews email:
youtube.scoop273@passinbox.com
USB inverter build, 5V to mains inverter, DIY inverter circuit and efficiency testing. I build a simple USB-powered inverter using a recycled phone charger transformer and compare its current consumption with the classic Jeanna's Light circuit.
Can a simple one-transistor USB inverter really match older high-efficiency inverter designs? In this video I dismantle a USB charger, reuse its transformer, build the inverter from scratch, test several different transistors and measure the actual current consumption while powering a mains LED night light.
Rather than simply showing that the circuit works, I focus on something rarely measured—the input current—and compare the results with my original Jeanna's Light inverter from 14 years ago.
If you enjoy practical electronics, transformer projects, inverter circuits, transistor experiments and energy efficiency testing, you'll find plenty of useful information here.
👍 If you enjoy practical electronics experiments, please Like, Subscribe and leave a comment about which transistor gave the best results.
Chapters
00:00 Jeanna's Light vs Modern USB Inverters
00:33 Building a USB Powered Inverter
01:20 Opening the USB Charger
02:11 Removing the Transformer
02:32 Circuit Diagram Explained
03:21 First Power-Up Test
04:30 Testing with C2898 Transistor
05:16 Testing a 2N3055
05:45 Testing a C4242
06:25 Variable Resistor Experiment
06:44 Reducing Current Consumption
07:30 Finding the Best Resistance
08:06 Final Results
#USBInverter #ElectronicsProjects #DIYElectronics
Enjoy my Playlists -
Wireless Electricity: youtube.com/watch?v=yYoYyuR1KuI&list=PLIhGrBMUdssWpFSLW1hznwNqXWpCxhDRQ
Electronics Projects: youtube.com/watch?v=F4nfaYkGvQI&list=PLIhGrBMUdssWLQWtW4dWWGgh25XG3HXek
Solar Projects: youtube.com/watch?v=nmKfxI4MTTs&list=PLIhGrBMUdssXu9Pmduvopm02_7IMz8d3M
Reviews: youtube.com/watch?v=8jAJysXXsw8&list=PLIhGrBMUdssUYzRgA1mrp18zwpTtClmov
💼 Business and reviews email:
youtube.scoop273@passinbox.com
