This circuit is for simple Random LED Number Generator Circuit using IC CD4017 decade counter and IC CD4011 NAND gate. It works on 9V power supply and the LEDs in the circuit represent the numbers. When we press the switch, one LED remains ON, because the counter runs very fast and the final LED looks […]
AC Lamp Flasher Circuit using SCR
This circuit is AC Lamp Flasher using SCR which works directly on 230V AC mains. It is simple and is with low cost project so it is useful for decoration light, warning lamp and festival lighting. Basically, the circuit uses SCR for switching and it also uses RC timing network, because of that the lamp […]
Audio Controlled Mini AC Lamp Flasher Circuit using SCR
This article is about a simple and low cost project, which we call it is an Audio Controlled Mini AC Lamp Flasher circuit using an SCR. It works with audio signal, when music comes the lamp flashes and when sound increases the lamp glows more. So it follows the audio level for this the circuit […]
Transistor Based Mini Emergency Light Circuit
Electricity failure is common in many areas, so we need backup light. This Transistor Based Mini Emergency Light Circuit is simple and is with low cost. It uses few components only and it works automatically when power fails. Therefore, it is useful for homes and small offices and it is easy to build even for […]
6V to 12V Battery Monitor Circuit using CMOS IC 7555
Battery is very important in many electronic projects, but however battery voltage goes down slowly and so device may stop working properly. Therefore, to solve this problem we have built a simple 6V to 12V Battery Monitor Circuit using CMOS IC 7555. This circuit uses IC 7555 timer and it gives indication using an LED, […]
Switch Mode LED Driver Circuit using Transistors
Nowadays, LED is used everywhere, its used in display, in indicator and for decoration purpose also. But LED needs proper current, so if we connect LED direct to battery then it may get damage. So, in this post we have designed a Switch Mode LED Driver Circuit using Transistors. This circuit is simple as it […]