FK900 Series General Interest Kits
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Kit makes a Low Battery Alarm or Sensor Device
Kit makes a low power voltage increaser. Can be used to demonstrate a very low power electrical shock
Kit makes a 3 level water indicator

Kit makes a two digit electronic counter
This circuit uses the principle of skin moisture volume detecting. Telling a 'lie' will increase skin moisture volume allowing this circuit to detect whether the test subject is "lying" or not. For entertainment purposes only!
Kit makes an interesting device that detects metal objects near the coil on the circuit

Kit makes a 4 digit electronic counter, presettable Assembled and tested now in stock!!
Kit makes an interesting device that detects INFRARED rays. Can be used to check that TV remote control.
Kit makes a Non Contact AC Voltage Detector Click on "more info" for details and options

Kit makes a 20 to 60 second digital sound recorder. Can be recorded over and over 100,000 times with included Microphone & Speaker included

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