Solar Garden Light
#solar
#LED
#garden light
#rechargeable battery
#light sensor
#automatic
#outdoor lighting
#energy efficient
#photovoltaic
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X’Mas LED Decoration circuit
This simple circuit can create an 18 LED flasher to decorate a Christmas tree. The white, blue, and red LEDs flash at different rates to provide a colorful display. It is a light-sensitive circuit, automatically activating in the evening and...
Interactive Toy Traffic Lights
This toy traffic signal utilizes a single low-cost hex Schmitt-trigger inverter IC (IC1a-IC1f) to directly control three colored LEDs (red, green, and amber). Upon activation, the circuit illuminates the red signal for 30 seconds, followed by green for 6 seconds,...
Led Flasher with a BC547 NPN transistor
This is a novel flasher circuit using a single driver transistor that takes its flash-rate from a flashing LED. The flasher in the photo is 3mm. An ordinary LED will not work. The flash rate cannot be altered by the...
30 LED audio frequency analyzer
This analyst is a sensitive instrument in the frequency changes and width of an acoustic signal. Thus, the brightness of the LED that turns on each moment is proportional to the signal width, while the color is proportional to the...
LED indication Integrated Circuits
The LB140 is depicted in Figure as a typical driver IC circuit for a five-digit LED level indicator. The BL1405 is commonly utilized in tape recorders for level indication.
The LB140 integrated circuit serves as a driver for five-digit LED displays,...
1 5 volt led flashers
The LED flasher circuits operate on a single 1.5-volt battery. The circuit on the upper right utilizes the widely used LM3909 LED flasher integrated circuit (IC) and requires only a timing capacitor and an LED.
The LM3909 is a specialized integrated...
Dark Activated Terrace Lamp
This is a compact circuit that can be wired in parallel with existing switches. The device enables one or more lamps to illuminate at sunset and turn off at dawn. It incorporates components Q1 and Q2.
The circuit is designed to...
Mains Powered White LED and Grand Prix Starting Lights circuit
An array of white LEDs can serve as a small lamp for the living room. LED lamps are readily available, resembling standard halogen lamps, and can be installed in a standard 230-V light fixture. A capacitor is employed to reduce...
72 LED Clock
The circuit employs 60 individual LEDs to represent the minutes of a clock and 12 LEDs to indicate the hours. The power supply and time base circuitry are consistent with those described in the previous 28 LED clock circuit. The...