Two simple crystal test circuits.
This is a project of a simple metal detector circuit. The circuit is easy to build using only one transistor and few other components. The circuit is a colpitts oscillator....
Here is a project of a 555 tester circuit which is very useful to check 555 timer ICs. In this circuit the NE555 IC is wired as an astable multivibrator....
This is a simple water level indicator circuit or water level sensor circuit. The circuit is very easy to build and contains only three PNP transistors and....
Simple infrared detector circuit which can be used to detect infrared light. The circuit is consist of only three components a RS-276-145 photo transistor, 330 Ohms....
A remote tester circuit or remote checker circuit which can be used to test TV and other remote controls. The circuit is very simple using only few components....
Triac or SCR is a very useful component, although it is not used in all electronic devices or circuits but in some electronic circuits it perform very essential tasks...
A very simple and useful project of soil moisture circuit. The circuit is using only four components and a 3 volt battery. The circuit will detect...
Here is a IR detector circuit which will detect IR from any equipment which emits IR and lights up an LED which will show the indication of IR beam...
A simple DIY LED continuity tester circuit which can be built in few minutes using only two companents a 390 Ohms resistor and LED. This continuity...
A very useful project of a crystal tester circuit or xtal tester circuit built with only few components the circuit form an oscillator that will only oscillate if...
This is a very simple transistor tester circuit the circuit can be used to test NPN and PNP transistors. The voltage source is a 6V power supply....
This is a circuit of simple infrared receiver to test remote control sets. The circuit uses photodiode SFH2030, the circuit require 12 volt power supply but a 9 volt battery will also work fine.
Circuit of a three digit voltmeter using 3161, CA3162 ICs
A useful circuit diagram of simple capacitance meter it will measure capacitors from 1pF to 22uF range.
This is a circuit diagram of a simple field strenght meter which uses only few components. One of the advantage of this circuit is that it doesnt needs power supply.
