Clamp on meters
Component testers
Education equipment
Electronic loads
Frequency counters
Insulation testers
Optical measuring instruments
Optical tools for optical construction and maintenance
Power meters, analyzers
Power supplies
Safety testers
Spectrum Analysers


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  1. Basic Measurement and Characteristic of SCR, TRIAC
       1-1: Operation of R.M.S. meter and measurement of three-phase voltage
       1-2: Operation of storage oscilloscope and differential amplifier
       1-3: Measurement and characteristic of SCR
       1-4: Measurement and characteristic of TRIAC 
  2. Single/Three-Phase Rectify and Phase Control (AC > DC, AC > AC)
       2-1: Single-phase half-wave uncontrolled rectifier (Half-wave rectify)
       2-2: Single-phase full-wave uncontrolled rectifier (Full-wave rectify)
       2-3: Operation of reference variable generator and three phase angle controller
       2-4: Operation of voltage/current to measuring transducer
       2-5: Single-phase half-wave controlled rectifier (Half-wave controlled rectifier)
       2-6: Single-phase full-wave controlled rectifier
       2-7: Single-phase full-wave semi- symmetric –controlled rectifier (Symmetric)
       2-8: Single-phase full-wave semi- asymmetric –controlled rectifier (Asymmetric)
       2-9: Single-phase semi-controlled AC regulator
       2-10: Single-phase full-controlled AC regulator
       2-11: Three-phase half-wave uncontrolled rectifier
       2-12: Three-phase full-wave uncontrolled rectifier
       2-13: Three-phase half-wave controlled rectifier
       2-14: Three-phase full-wave semi-controlled rectifier
       2-15: Three-phase full-wave full-controlled rectifier
       2-16: Three-phase full-wave semi-controlled AC regulator
       2-17: Three-phase full-wave full-controlled AC regulator 
  3. DC Chopper Circuit and Characteristic of IGBT (DC > DC)
       3-1: Measurement and characteristic of IGBT
       3-2: Basic description of DC chopper
       3-3: Single quadrant DC chopper
       3-4: Two quadrant DC chopper
       3-5: Four quadrant DC chopper 
  4. Single/Three-Phase Frequency Converter (AC > DC > AC)
       4-1: Basic description and principle of frequency converter
       4-2: Single-phase PWM controller circuit
       4-3: Single-phase frequency converter
       4-4: Analysis of Three-phase PWM controller circuit
       4-5: Three-phase PWM controller circuit
       4-6: Three-phase frequency converter 
  5. Switching Power Supply Circuit and Characteristic of MOSFET (DC > DC)
       5-1: Measurement and characteristic of MOSFET
       5-2: Buck switching power supply
       5-3: Boost switching power supply
       5-4: Buck-boost switching power supply
       5-5: Fly-back switching power supply 
  6. Electronic Ballast Circuit (AC > AC)