Touch Switch Circuit
Touch Switch Circuit using NE 555 Description This is the circuit diagram of a small touch plate controller using IC NE 555 .This circuit is ideally useful for making touch operated doorbells,...
View ArticleSimple Relay Circuit
The following schematic illustrates the Simple Relay Circuit Diagram. When the switch S is closed in a relay circuit, current flows in the coil, causing a strong magnetic field around the coil. The...
View ArticleSimple Water Level Indicator Diagram
Water Level Indicator Description This is the circuit diagram of a simple corrosion free water level indicator for home and industries. In fact the the level of any conductive non corrosive liquids can...
View ArticleMobile incoming call indicator
Description. This circuit can be used to escape from the nuisance of mobile phone rings when you are at home. This circuit will give a visual indication if placed near a mobile phone even if the ringer...
View ArticleMosquito repeller power saver
Description. Almost all liquidator type mosquito repellers are rated 5Watts. It is a pretty energy consuming game when these repellers are operated through out the night. Even though these liquidators...
View ArticlePlant moisture level monitor
Description. Here is a simple circuit that will give a visual indication when the soil water level inside your flower pot goes low below a certain limit. The U1C and associated components are wired as...
View ArticleSimple Lamp Dimmer/ Fan Regulator
A Lamp Dimmer/Fan Regulator Circuit We have modified this circuit: – Take a look – Modified Lamp Dimmer Description . This is the circuit diagram of the simplest lamp dimmer or fan regulator.The...
View ArticleTelephone off-hook indicator
Description. The circuit depicted here can be used as an indicator when the telephone receiver is off-hook. The circuit can be in corporated with old telephones that does not have such an indicator....
View ArticleTransistor intercom circuit.
Description. Here is a simple but effective intercom circuit that is based fully on transistors.The circuit is based on a three stage RC coupled amplifier. When the pushbutton S2 is pressed, the...
View ArticleUnity Gain Follower by IC LM741
This is the Voltage Follower used to transfer or copy a voltage from a first circuit (Vin) to a second circuit (V out),with gain rate is equal to 1 only, that is AV = Vout/Vin = 1 ; Vout = Vin. The...
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