12V Mini Emergency Light Circuit with LDR is simple project to make; here, light gets ON automatically when dark and it works with bright white LED and uses 12V battery. Also, the circuit is good for home, garage and emergency. Circuit Working: Parts List: Components Values Quantity Resistors 10k 1/4 watt 1 2.2k 1/4 watt […]
LED and Lamps
USB Lamp Circuit for Portable Lighting
USB Lamp Circuit for Portable Lighting is good for portable light, as it is easy to use and takes power from USB port of 5V; also it have rechargeable battery which are more useful. USB port give only 100 mA so use LEDs less and in addition this circuit have transistor, diodes, capacitor, resistors, LEDs […]
Dual LED Temperature Indicator Circuit
Dual LED Temperature Indicator Circuit light one LED when hot and other when cold and it uses IC LM35 temperature sensor, CA3130 op-amp and two BC547 transistors. IC 7805 change 9V to steady 5V and if there is 5V already then we can connect directly, then IC LM35 gives 10mV more for every 1°C rise. […]
Simple Mains Powered LED Light Circuit
Simple Mains Powered LED Light Circuit runs on 230V AC mains; also it uses capacitor dropper to limit the current. Moreover, LEDs in series-parallel are cheap and easy for mains lighting and they are with bright white light and no big transformer; furthermore, it is good for low power light needs. Circuit Working: Parts List: […]
Simple Time Delay LED Circuit using Transistor
This article is about Simple Time Delay LED Circuit using Transistor where the LED lit after a short wait; also the circuit needs transistor, capacitor and few resistors for delay. In addition , the circuit is good for power light, warning light and timing project and it work with 10V DC and fits many electronics. […]
Battery Operated Automatic Emergency Light Circuit
An automatic emergency light uses a battery and provides light when the power goes out. Lamp turns ON itself when main power fails and is good for home, office or anywhere which need extra light; also it is best to use 6V lead acid battery or 5×1.2V NiCd cells. In addition, the battery-operated automatic emergency […]