For several years now, a rear fog lamp has been mandatory for trailers and caravans in order to improve visibility under foggy conditions.When this fog lamp is switched on, the fog lamp of the pulling vehicle must be switched off to avoid irritating reflections. For this purpose, a mechanical … [Read more...]
This project will be useful to check the output of your USB device like computers USB port etc.The green LED will indicate whether it is working or not.It will be useful to have it in your mini lab or hobbyists garage. Components Needed : The PCB - you ca make PCB on your own by method … [Read more...]
It’s usually is a good idea to check the temperature before setting off for an outdoor activity. Equally important is a temperature check while at the actual place. The former is easy to do using the local TV or the Internet but once you are in the bush or the countryside such a task becomes more … [Read more...]
The idea for this circuit came when I was repairing my aunt’s emergency light. Bulb based emergency lighting has a low efficiency and ultrabright l.e.d.s provide greater efficiency and more illumination, with a much extended battery life. It was therefore decided to change from a 12V light bulb to … [Read more...]
THE circuit shown in Fig. must represent the limits of simplicity for a metal detector – yet the design works surprisingly well. It uses just one 40106 hex Schmitt inverter i.c., a capacitor, and a search coil – and of course the batteries. A lead from IC1b pin 4 needs to be attached to a medium … [Read more...]
Often Garden Lights are made by high watt electric bulbs which increases the power consumption ,In order to solve this problem we built a smart garden light which is built by 32 yellow LED's hence the power consumption is very Less.This smart Garden light can be set to any light intensity below … [Read more...]
Water is vital for humans, but too much of it has an undesirable effect, particularly when it turns up in the wrong places. This is what two of our designers discovered after a blocked drain of a combination boiler and a leaking filter of an aquarium. This will quickly suggest the idea of designing … [Read more...]
SOME modern freezers contain alarms which sound if you leave the door open and allow the internal space to warm up. However, they do not work if the freezer suffers a power failure, which is a bit of a drawback. Making a temperature-sensitive circuit which can sound an alarm is not too difficult but … [Read more...]
" Has the washing machine finished ! "The washing machine alarm circuit described here will give an audible signal (in the form of high-pitched bleeping) when the washing cycle has finished. If the machine has been left on a … [Read more...]
" How to avoid having an unwanted rear entrance to your garage! "This is a device to aid you in parkiar in a garage by providing a visual and audible warning. It is easily set up by mounting it onto the wall at the end of the … [Read more...]