This is one IC that is like a E-LEGO, this along with Op-Amps and other components can make many interesting projects. Probably the very first Datasheet and Application Note of 555 t he e-lego.
Signetics made the 555, On some pins like Control Voltage it responds to analog signals and on Reset and Output the signals are Digital like. The 7555 a CMOS version consumes lower power and oscillates at higher frequencies.
NE555 Applications and Specifications
This evergreen or perennial chip is the favorite among students and hobbyists who want to learn electronics. Here is an original datasheet from Signetics i found online, it has very nice illustrations which will act as an appetizer for learning this science.
I want students to look into these specs pages as it will make your study more invigorating
555 Timer based Circuits – delabs
Signetics made the 555, This is one IC that is like a E-LEGO, this along with Op-Amps and other components can make…
555 The most Incredible Chip
Create an innovative 555 design today, the 555 should be the heart of the circuit. Here are some pages having 555…
The true Christmas Spirit is in giving, You can only give if you have something, right. You can Have when you Acquire Skills, Imagination and a Cheerful Attitude.This will help you Create Things! – dapj
Develop a Skill this Christmas, Build these small LED Trees and give it to people who need a little bit of cheering up.
Christmas Tree – CircuitStew “This was the first and last complete prototype that I made on proto board. This style of prototyping produces circuits that are very difficult to understand, debug, and modify. Because of all the extra work involved they also take forever to assemble. Suddenly I became very interested in designing and fabricating custom pcbs….”
The name CircuitStew refers both to the jumble of electronics presented here and to circuit boards suspended in neon green copper etching solution. – Derek Wolfe
This is dual 555 multivibrator like power oscillator. This is my contraption and conception but couple of decades old. It appears to have errors. It worked but the document fixing after design worked, not done. This can be used to make a small inverter, for powering 230V gadgets of low power. The transformer is used in step-up mode. It may make a sound if the laminations are not of good quality.
This circuit can be modified using 7555 and switching transistors like BD139 driving a Ferrite 100 kHz transformer to build a Fluorescent Lamp of 10W to 20W.
Fluorescent lamps can be fired and lit at high frequency at relatively lower voltages. Experiment both with frequency and pulse width to get nominal lighting at good efficiency. One of the reasons CFL lamps -230V and emergency lamps 12V fail, is failure of the switching devices. These have to be overrated thrice or more, the switching heat dissipation should not be underestimated, during low/high voltage and keep a aging allowance.
Designing a working circuit is no big deal. But making a batch of reliable and robust power electronics products, which are idiot proof and abuse resistant is a challenge for engineering. Then they will need it at an affordable price too… Checkmate !