Category «Lighting»

Random Blinking (Flashing) LED

We can using this circuit to make the LEDs blink in a random pattern according to the slight differences in the three Schmitt Trigger oscillators. The CD4511 is BCD to 7 segment Driver, so the pattern of the led is actually the come from seven segment representation. Arrange the LEDs to be far from seven …

TPS108x Versatile Boost Converter

This is Versatile Boost Converter circuit using TPS108x. The TPS1081 has chosen because it is suitable for application that requires up to 20 V and 100 mA to drive each column of a passive-matrix OLED (PMOLED). the TPS61080 is suitable for application that requires less than 10 V and only tens of milliamps per column …

Backlight Driver for WLED-Display

This is WLED-display backlight driver circuit. This circuit can be used to power WLEDs by replacing the voltage-feedback network with a series current-sense resistor, R3, and the WLED strings. This circuit uses The TPS6108x that drive some series WLEDs in parallel for backlighting larger displays. Here is the circuit:The feedback of this circuit is The …

Animated LED for Bike Turning Signal

Using this circuit, we can make animated LED for bike turning signal. The Led will blink from the right (LED 1)  to the left side (LED 5). You must build the second unit to give the complete left and right t urn signal. For the right turn signal, arrange the LEDs so they blink from …

Auto OFF Light

This is Auto OFF Light circuit. After the switch is pressed, the bulb is kept illuminated for a few seconds. To increase the “ON” time, The 10k should be  replaced by 100k. Here is the circuit: You can use this delayed auto-off lamp circuit to give temporary lighting for  your stairway, or your dashboard, your …

10-20V Regulated LED Lamp

Resistor and LM317L act as a current regulator set to 40 ma. Current will flow from the battery through one pair of LEDs, and then to the regulator, through the other pair of LEDs and finally back to the battery. Noise on the power supply lines filtered out by the capacitor. To make the current …

Solar-Powered Garden Lamp with Light Sensor

Below is reverse engineered circuit diagram of yet another commercially produced solar garden lamp. To turn the light on at night, this depends upon a CDS photocell. It allows the battery to charge more efficiently although more complex than the circuits. Read more original source: http://members.shaw.ca/novotill/SolarGardenLight/index.htm