Posts Tagged ‘led night light’

Two LED Christmas lightbulb

Reverse engineered circuit diagram of a commercial LED Christmas bulb for outdoor chains. The circuit board, which sits inside the plastic lamp just above the screw base, has a spot for a zener and capacitor which are not installed.

Read source:

http://www.members.shaw.ca/novotill/LedLineLights/index.htm

LED Night line 120V using SCR

Reverse engineered circuit diagram of another commercial LED night light. This one has a photocell to turn the light off during the day. It also uses light pipe techniques to make the little LED look like a larger lamp. The photocell circuit has hysterisys so that for all intensive purposes the light is always either fully on or fully off.

Read source: http://www.members.shaw.ca/novotill/LedLineLights/index.htm

Related Links
More circuit by super bright led
More about led night light circuit
More circuit about LDR sensor
More about LDR control circuit
More light dark detector circuit
More about light sensitivity
LED Fiber Optic Night Light
Led display for battery low volt
2C cell LED Flashlight
Dimmer Lamp LDR control with Triac.
Light Sensitive Switch with LDR + 2N2926

Battery-powered Night Lamp by 555

Ultra-low current drawing
1.5V battery supply
This circuit is usable as a Night Lamp when a wall mains socket is not available to plug-in an ever running small neon lamp device. In order to ensure minimum battery consumption, one 1.5V cell is used, and a simple voltage doubler drives a pulsating ultra-bright LED: current drawing is less than 500µA.
An optional Photo resistor will switch-off the circuit in daylight or when room lamps illuminate, allowing further current economy.
This device will run for about 3 months continuously on an ordinary AA sized cell or for around 6 months on an alkaline type cell but, adding the Photo resistor circuitry, running time will be doubled or, very likely, triplicated.

Parts:
R1,R2___________1M 1/4W Resistors
R3_____________47K 1/4W Resistor (optional: see Notes)
R4____________Photo resistor (any type, optional: see Notes)
C1____________100nF 63V Polyester Capacitor
C2____________220µF 25V Electrolytic Capacitor
D1______________LED Red 10mm. Ultra-bright (see Notes)
D2___________1N5819 40V 1A Schottky-barrier Diode (see Notes)
IC1____________7555 or TS555CN CMos Timer IC
B1_____________1.5V Battery (AA or AAA cell etc.)

Please read more at the original source:http://www.redcircuits.com//Page44.htm

Related Links Circuit
More about Battery Check
More circuit led night light
More lighting sensor circuit
Low volt led display circuit
Led Flasher LOW VOLT
LED flasher indicates low-battery condition
Level Detector by IC LM741
LED Voltmeter for car battery by LM324
Low Battery Voltage Indicator by IC 8211