The Gakken EX-System is a series of educational electronics kits produced by Gakken in the late 1970s. The kits use denshi blocks (also known as electronic blocks) to allow electronics experiments to be performed easily and safely. Over 25 years after its original release, one of the main kits from the series was reissued in Japan in 2002.
EX 100 + EX-D microphone, CdS cell Circuit which Buzzes when Struck by Ligh
antenna, crystal earpiece Diode Detector Radio
EX-120 + EX-E analogue meter Noise Level Meter
EX-150 + EX-System Synthesiser synthesiser block, resistance board Sound of Car being Reversed
EX-15 + EX-A morse key block, short cables Morse Code Practice Circuit
EX-30 + EX-B IC Amplifier I-Diode Detector + IC Radio (Fixed Bias)
any main kit + EX-FM FM tuner block FM Receiver with Microphone Mixer
The FX-System was introduced in 1981. It used TMS1000 processor.
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