The low resistance measuring circuit explained below can be used for measuring all milliohm resistances below 1 ohm with extreme accuracy. The resistance to be measured can be as low […]
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Simple Low Dropout Regulator Circuits Explained
The transistorized low dropout voltage regulator circuit ideas explained in the following article can be used for getting stabilized output voltages right from 3 V and above, such as 5 […]
Prevent Amplifier Fuse from Blowing During Power Switch ON
Is your power amplifier fuse blowing during power switch ON? It could be happening due to the initial high current drawn by the loudspeakers, when power is switched ON. The […]
Password Controlled AC Mains ON/OFF Switch
In this post we are going to construct a password based mains ON/OFF switch circuit, which can turn ON and OFF the AC mains supply, only when correct password is […]
Mains High Low Voltage Protection Circuit with Delay Monitor
The post explains an upgraded version of my previous mains 220V/120V high-low voltage cut off protection circuit which now includes a delayed restoration of power for the load with 3 […]
Password Security Lock Circuit Using 4×4 Keypad and Arduino
In this post we are going to construct a password security lock circuit, which can be accessed by a 6-digit password. To be more precise it is alpha numeric password. […]