The Portable Solar Lantern

This portable solar lantern circuit uses 6 volt/5 watt solar panels are now widely available. With the help of such a photo-voltaic panel we can construct an economical, simple but efficient and truly portable solar lantern unit. Next important component required is a high power...

Soldering Iron Tip Preserver

Although 60/40 solder melts at about 200&degC, the tip temperature of a soldering iron should be at about 370&degC. This is necessary to make a good quick joint, without the risk of overheating delicate components because the iron has to be kept on the joint for...

Soft Start For Switching Power Supply

Switching power supply whose output voltage is appreciably lower than its input voltage has an interesting property: the current drawn by it is smaller than its output current. However, the input power (UI) is, of course, greater than the output power. There is another aspect that...

Magnetometer

Magnetometers are scientific instruments that are used to measure the direction and strength of magnetic fields in the location that the device is located. They are used both on Earth as well on space exploration missions due to the significant variations that are found in magnetic...

A Homemade jet engine

A Homemade jet engine (The journey begins) The 600 Watt vacuum cleaner that started it all.Its made in China, where they obviously havent yet perfected the technique of making poor quality goods that hold together just long enough for you to lose the guarantee.Its so powerful,...

How to Build a Homemade Pure Sine Wave Inverter Using IC 555

How to Build a Homemade Pure Sine Wave Inverter, Using IC 555 Posted by hitman The proposed circuit generates accurately spaced PWM pulses which imitates a sine wave very closely and thus can be considered as good as its sine wave counter part design. Here we use  two stages...

Dual Power Supply 78xx 79xx

Many times the hobbyist wants to have a simple, dual power supply for a project. Existing powersupplies may be too big either in power output or physical size. Just a simple Dual Power Supply is required.For most non-critical applications the best and simplest choice for a voltage...