02:03

A view from the rooftop of a hotel in Busan, Korea

02:05

How to Make a Vernier Caliper Pouch Using a Classic Sewing Machine

02:32

home induction heater repair

04:07

How to operate a Tiger mechanical calculator

02:39

Electrolytic water generator analysis

02:18

DIY Mouse Electro-magnetice Shielding Device

02:36

DIY Portable Radio Pocket

03:55

Recycle and refill the discharged lithium-ion battery of Ti-nspire CX scientific calculator

03:14

Application of USB voltage and current meter

05:26

Small SMPS 12V, Modified into Variable Voltage Regulator

01:30

DIY Light Switch ON-OFF Monitoring LED

03:34

Transformerless LED lighting circuit analysis and modification

03:29

Hiking Cheonmasan Mountain in Seo-gu, Busan, South Korea

00:11

Little girl and parrot

02:42

Application of FFT app for vibration frequency analysis

04:17

Vintage Singer Sewing Machine Crank handle Repair

02:24

Repairing broken glasses case

09:39

Vintage SONY RADIO TR-847 Review

05:48

DIY practical smartphone wireless charger repair and modification

04:22

DIY a vernier caliper protective cover

03:36

BJT single amplifer failure simulation by LT SPICE

07:00

Analysis of vintage shortwave radio Panasonic R-205HB

03:02

DIY a radio wallet using a sewing machine

03:08

Portable butane gas igniter fun application experiment

03:03

How to clean oxidized vintage air varicon for RF wireless device

10:49

How to determine the circuit component constants of a BJT amplifier

02:49

BJT Colpitts oscillator design, simulation and circuit implementation

06:47

Business trip from Busan to Jeju Island, South Korea

04:23

Troubleshooting of vintage car steering wheel steering angle display device

08:18

How to register LT spice model library

04:05

BJT CE amplifier input/output simulation by LT spice

05:33

BJT CE amplifier frequency response simulation by LT spice

24:57

Colpitts oscillator circuit design and simulation by LT spice

09:10

RETEKESS V115, digital radio, automatic station selection and registration method

07:12

RF-H535 digital radio troubleshooting

04:50

Antenna tuning and local oscillation coil decomposition in the HF band (for educational)

06:24

DIY Retro LED Lantern Modification

05:12

LDM-815 DIP METER troubleshooting

02:57

Twin-t oscillator design with OP-AMP (for educational )

02:19

New Year’s Kjungari Samulnori in Bupyeong Market, Busan, Republic of Korea

03:20

Making a table using a car steering wheel

03:57

Extension probe for DIY oscilloscopes

05:01

Measuring superheterodyne AM radio signals (for educational)

03:33

DIY hair dryer repair

07:28

Various uses of speed controllers for large vacuum cleaners

05:11

How to track integrated circuit (IC) failures

05:43

The easiest way to check the forward voltage of an LED/diode

04:53

Single transistor amplifier production experiment (for educational )

03:01

How to check for diode/bridge diode failure

02:55

DIY vintage watch battery replacement

04:04

Comparing pulse oscillators designed with OP-amps using single/dual power supplies

04:31

How to use power wire connection tools

06:30

DIY super probe

01:56

Disassembling small SMPS and observing waveforms of important parts (for educational purposes)

03:08

Home use low-power laser pain relief treatment device malfunction repair

00:53

Replace vehicle interior lights with high-brightness white LEDs

03:42

PWM sine wave inverter control circuit design (for educational)

03:01

How to measure internal resistance of 18650 lithium-ion battery (simplest method)

03:08

NE555 High Power LED PWM dimmer troubleshooting

01:36

smps waveform measurement