make a plug in emergency light with a li ion battery
#emergency light
#li-ion battery
#LED
#battery backup
#power outage
#DIY
#home lighting
#energy efficient
#portable light
#automatic switch
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flash light electronic diagram
This circuit causes an LED to blink every half second. The duration of the blinking can be modified by changing the value of capacitor C1. Additionally, up to 18 more LEDs can be connected to this circuit, allowing for a...
Make this Fancy LED Tail Ring Light Circuit for your Car
The following article outlines a sophisticated LED sequencing and diverging ring light that can serve as a tail brake light in vehicles. This circuit concept was proposed by a dedicated reader, Mr. Bobby. The design aims to create a circular...
19 LED Clock circuit
The clock circuit above uses seven ICs and 19 LEDs to indicate binary coded decimal time. The LEDs can be arranged so that each horizontal group of 3 or 4 LEDs represents a decimal digit between 0 and 9 and...
Powerful LED Flashlight circuit
Presented circuit is very simple. With more sampling, I refrained from using the converter and lamp designed for powering three NiCd or NiMH batteries. Because the voltage difference between the battery and the LED is very small, this arrangement is...
Phone Message Flasher
This circuit flashes an LED to indicate that a phone rang during the user's absence. A differential amplifier with hysteresis (Q1, Q2, and Q3) detects high line voltage (ringing), which activates Q4, a multivibrator composed of Q5 and Q6, and...
LED DRIVER
An input sine wave applied to the left amplifier base results in the collector output fluctuating above or below 6.6 volts. The amplifier amplifies and inverts the signal, maintaining a roughly centered output, thereby minimizing the chances of clipping. The...
white lights
The white LEDs have varying voltage and current requirements, necessitating the use of different resistors. A parts list will be provided. The design concept is similar to previous iterations, but the white LEDs are configured differently due to their dedicated...
Two-LED Pilot Light
This circuit was designed on request and can be useful to those wishing to have, say, a red LED illuminated when an appliance is on and a green LED illuminated when the same appliance is off. Any mains operated appliance...
Current Mirror for LEDs
A Meanwell LED driver rated at 27V and 2300mA is available for use, intended to power two parallel strings of six LEDs each. The question arises whether to maintain the existing circuit with the same component values or to adjust...