The in circuit TR checker device can examine both NPN and PNP transistors to check whether it is practical or not.

Kit makes a Non Contact AC Voltage Detector Click on "more info" for details and options

Kit makes a Digital Temperature Controller, requires assembly Click on "more info" for details and options

Kit makes a basic Water Level and Resistance Tester 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

Special Purchase. Digital Multi Meter with 7 Functions

Kit makes a 4 digit electronic counter, presettable Assembled and tested now in stock!!

Kit makes an electonic body temperature monitor / alarm

Kit makes an electonic thermostat control 0-100 celsius or 32-212 F

Kit makes an electonic voice changing circuit