Feeling difficult to grope for a light switch in deep sleep when someone calls you at night? Then may be this cellphone triggered RF night lamp circuit can solve your problem….This is a very simple basic circuit and is easy to construct compared to other online available circuits which switches on a relay when it […]
Cell
Bicycle LED Light Circuit Using a Single 1.5V Cell
The proposed bike flasher flashes two white LEDs from a single 1.5V cell by using a solitary general purpose transistor, and does not need core for the involved transformer, the main core being the Air itself. Using Joule Thief Concept Every Joule Thief circuit uses ferrite rod or toroid core and its turns are wounded […]
How to Connect 5mm LEDs to a 3.7V Li-Ion Cell
In this article I have explained regarding how to connect and illuminate a few 5mm LEDs using a 3.7V Li-Ion cell, normally used in cell phones. I keep receiving requests from the readers who seem confused with the connection details of 5mm LEds with a 3.7V Li-ion cell. The requests inspired me to write this […]
How to Charge a Cell Phone from a 1.5V Battery
In this post I have explained a very simple charging a cell phone from a 1.5v battery utilizing merely a 1.5V as the input source. The source can be any 1.5V cell rated at minimum 1000 mAH. Circuit Operation The circuit description is provided below, let’s try to understand the working principle of the proposed […]
Cell Phone Ring to Flashing Lamp Indicator for People with Hearing Loss
In this post I have explained a simple sound to flashing lamp circuit which can be used for facilitating people with hearing loss, so that they are able to visualize a distant cell phone rings through flashing of a lamp, and immediately understand regarding an incoming call in their cell phone. The following explanation and […]