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In this instructable i will teach you every thing you would ever need to know about the 555 timer IC. If you already know about the chip you could check out my slide show titled “ 47 projects to do with a 555 ” it will teach you every basic project to use a 555 with, its great for beginners! [ ]

JUNCTION FIELD EFFECT TRANSISTOR (JFET) is a unipolar voltage controlled device. Because Drain current is controlled by the voltage applied to gate-source terminal. Likewise in Transistors, JFET amplifiers can also be setup in the three configurations namely, Common Drain, Common Source and Common Gate. Transistor Configurations Common source configuration is almost similar to Common emitter configuration of BJT's (Common Emitter RC Coupled Amplifier). JFET can also be biased as Voltage Divider or Self Bias. Read More.....

SIMPLE HEAT SWITCH CIRCUIT Hello everyone, Here we are discussing about a Simple Heat sensing or detecting circuit. This circuit indicates you whenever it senses Temperature. The sensing is done by using a THERMISTOR of 110 ohms. The resistance of Thermistor reduces on increase in Temperature which makes the LED glow. The circuit is powered by a 6V battery. CIRCUIT DIAGRAM FOR HEAT DETECTOR Components used:- R1 THERMISTOR 110Ω R2 100Ω R3 3.3KΩ Q1 Bc548 NPN You can also Try Smoke Detector using 555 Timer

This Simple LED Photo-therapy Circuit Diagram is used for therapeutic phototherapy. Light at the correct wavelength can be effective against depression and allergies. There are a wide range of products on the market, dear, they are presented as remedies for dust allergy, fever etc.. If we look at these devices in more detail, we see that the operation is relatively simple to explain.  Common to all devices is that they emit deep red light with a wavelength of 660 nm.Some of these devices to claim phototherapy light of 660 nm can have a positive effect on the human body and can initiate curing processes. This is so-called "phototherapy" is a treatment which is claimed to have an effect against allergic reactions in the body, as it acts against oxygen free radicals and strengthens the immune system, reducing inflammation of the mucous membrane. This treatment has the shape of a product, but rather in the form of visible light, so there is no risk of side effects. There was a sc...

Used ICs - MIP2H2 – CXA3809M SMPS [Power supply regulator board] - circuit diagram Click on the schematics to zoom in

This is a very Low Distortion Wien Bridge Based Oscillator Circuit Diagram Project .This complex oscillator circuit uses a photocell and common-mode-suppression circuitry to achieve distortion of 0.0003%. This oscillator circuit replaces the lamp in the traditional Wien bridge with an electronic equivalent.  Very Low Distortion Wien Bridge Based Oscillator Circuit Diagram