This is first mini emergency light of my son. It is very small, use LED display when power outage,use transistor instead relay use AA battery charger.
I like Blinking 2 LED circuit using NPN transistors. We normally see it in a lot of circuit as oscillators and LED flahser.
This is many LED flasher circuit and with PCB layout using transistors astable multi vibrator as low frequency oscillator below more...[...]
We will add beauty to CAR brake light circuit. With a display of 14 LEDs, visible clearly, for safety and beautiful. The installation format can fix by oneself as you like it.
When we use the bicycle(normal bike) at night. we used IC1 IC555 Oscillator signal is output to a lot LED super bright.
The siren light uses that general use motor help in the whirl lamp or refect go to around, which weigh very and when be usable go to for a long…
This is Circuit Christmas Tree Lights Flasher with 7812 for supply regulator and IC LM380 for Signal generator dirve relay on-off the lamp two set. detail other see circuit. The…