Two strips of LEDs fading in a complementary manner, 9V Battery-operated portable unit. This circuit operates two LED strips in pulsing mode, i.e. one LED strip goes from off state, lights up ...

This is the first basic LED circuit I built many years ago in my school days and had given me immense pleasure to see glowing LED. For building this circuit you only need four things: LED- 1; Resistor ...

This is a very simple 9V low battery indicator circuit which has 2 LEDs, one green which will light up when the battery voltage is higher than 6.9 volts and one red LED which will light up when the ...

In this project, we are going to teach you making awesome electronics project ideas. It is called flasher circuit. We are making this circuit using a timer cheap IC (NE555). You can operate this ...

A 9V /250mAh NI-MH Rechargeable battery is used to test the prototype. If possible, try to use a 9V type with higher current capacity. Value of R3-R4-R5 is optimised for the white LEDs used in the ...

Fig. 1: Circuit diagram of ±5V supply from 9V battery. Circuit and working The circuit diagram for the ±5V supply from a 9V battery is shown in Fig. 1. It is built around 9V battery (BATT.1), voltage ...

The basic circuit illuminates up to ten LEDs in sequence, following the rhythm of music or speech picked-up by a small microphone. The expanded version can drive up to ten strips, formed by up to five ...