This is Simple non-contact voltage tester using transistors next one circuit that use all transistor as main,it is cheap and easily build. Which many friends likeNon contact AC Detector Voltage. It use CD4060 as main
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This non-contact ac voltage detector circuit, using digital IC CD4060 as main components and resistor and LED display only. it is use 9V battery as power supply.
This is an simple op-amp IC tester circuit that cheap and easy to build. for test many op-amp ICs fast check. for LM741, LM324, LM339, LM358, LM311 and more [...]
This is a simple temperature to voltage converter circuit or an Electronic thermometer circuit there. Which will operate in a temperature range of 0 to 24 degrees Celsius (32 to…
The TV test pattern generator circuit with wireless model. To assemble circuit easy, can transmit signal in wireless to video and audio As horizontal line.
This is Crystal tester circuit using NPN transistors as main. LED1 is light up when a crystal is good and simple oscillator circuit works.
This Simple remote control tester circuit so use this photo transistor is light receiver from remote control.If it is nice to have bias of transistor BC558