I like Blinking 2 LED circuit using NPN transistors. We normally see it in a lot of circuit as oscillators and LED flahser.
This is the Circle LED chaser circuit or 10 LEDrunning light as another kind of string light circuit. Which is running light on circle each one step beautifully and can…
The circuit uses a 555 timer oscillator to supply clock pulses of a variable frequency to the 4017 decade counter. The decade counter only needs to have three outputs so…
Simplest Automatic Solar Light from Water Bottle
This is simplest automatic solar led light circuit that my son try to make it for basic small solar charger. to use 2 x AA NI-MH battery total 2.4V
This is simple hight power LED flashlight,we use 24 LEDs super bright for display and 3 AA batteries and resistor for limit current so cheaper.
This is Outdoor solar lights circuits made by my son, at day solar charge to battery then night LED light up without AC line, Relay control the solar current [...]
The 1.5v led flashlight circuit which also use single AA 1.5V battery. But few parts. Such as we use one transistor only. And all other parts of 5 pcs only [...]