红包扫雷哪个平台最好

Heat Sink - Basics

As power transistor handle large currents, they always heat up during operation. Since transistor is a temperature dependent device, the heat generated must be dissipated to the surrounding in order to keep the temperature within permissible limits. Generally, the transistor is fixed on a metal sheet (usually aluminum) so that additional heat is transferred to the Aluminum sheet. The metal sheet that serves to dissipate the additional heat from the power transistor is known as heat sink.

Fig-1:  Heat Sink (Aluminum Sheet)

Automatic Power Off Circuit Diagram

It is an automatic power off circuit diagram.  If you need to shut-off any electronic device after a set amount of time then this circuit can do that automatically; when you are even sleeping!  For example this auto power off circuit can be used with garden/porch light, soldering iron/ glue gun or similar other devices to auto shut it off for saving electricity or save the device, or you can use it to suit your own needs.

10W Audio Amplifier Circuit by TDA2030

The amplifier circuit by ic TDA2030 described here is an powerful audio amplifier with output power of 10W. TDA2030 is a monolithic IC, used as a low frequency class AB Amplifier. It has high output current and very low distortion. This 10W audio amplifier using TDA2030 is good for home/ small room.

Circuit Diagram of '10W amplifier circuit using IC TDA2030' with power supply.


Fig-1: Circuit Diagram of 10W audio amplifier

12v Regulated Power Supply Circuit Diagram

Here this circuit diagram is for +12V regulated (fixed voltage) DC power supply. This power supply circuit diagram is ideal for an average current requirement of  1Amp. This  circuit is based on IC LM7812. It is a 3-terminal (+ve) voltage regulator IC. It has short circuit  protection , thermal overload protection.  LM7812 IC is from LM78XX series. The LM78XX series IC is  positive voltage regulator IC for different voltage requirements, for example LM7805 IC is made for 5 volt fixed output voltage . There is LM79XX IC series for negative voltage .

Circuit diagram of 12v regulated power supply



Fig: 12V power supply circuit diagram

Simple FM Transmitter Circuit Schematic

This is a simplest FM transmitter circuit schematic with a single transistor. It build with a very few numbers of components include a transistor, few capacitors, resistors and a small microphone.

Clap Switch Circuit Diagram Project

This is a simple clap switch circuit diagram project. If you are a beginner electronics learner, and love to do new project experiment then this is a great circuit for you.  This circuit can on/off a 220V electronic device like fan, lamp by the sound of clap.

Circuit diagram of clap switch


Re-using fused tube-light by 4 diode

A tube-light get fused due to use from a long time. You may notice that a used fluorescent tube-light get black colored on the both end of it. This circuit is to light-up those fused tube-light.
Have you think about re using a fused tube light? (Which is usually thrown out). Well here I’m showing a simple circuit using 4 diode for re-using a fused tube light.



100 watt inverter schematic diagram – 12 Volt to 220 Volt

Here this is a simplest circuit for 100 watt inverter for generating 220vAC from 12vDC. I say simplest because here in this inverter circuit a minimum number of components are used to design the schematic, which is quite difficult to make a circuit like this with further fewer components.

100 watt inverter schematic diagram


Fig: Schematic diagram of 100W inverter
This 100W inverter circuit works great for small loads like a fan or 2-3 bulbs/lamps. In this circuit as IC1 we used a CD 4047 IC to generate 100Hz frequency (180 degree out of phase). CD 4047 IC is from Texas Instruments. It is mostly used as Astable/Monostable signal generator device. In this circuit it is triggered as astable multivibrator by the capacitor C1 between the Pin 1 and 3 of CD4047. And VR1 is used to adjust the frequency of signal.

Water Sensor Circuit Diagram using IC 555

This is a water sensor /rain alarm circuit diagram; it can be used on motorcycle, car or other device that we want to protect from water, rain.
This is a simple water sensor/rain alarm circuit that makes an alarm when water/rain falls on its sensor. This circuit is based on NE555/LM555 IC and two transistors (Q1&Q2). For  transistor Q1- BC547 or BC107 and for Q2-  2N825,BC548 or BC168 can be used in the circuit. This rain detector circuit can be supplied from voltage source of +9V-12V DC. The resistor 470K ohm is a POT/Variable resistor; it is used to adjust the sensitivity of water/rain sensor. Use a 8 ohm,0.5w-1W  speaker to hearing  better alarm. Less than 8 ohm speaker could be harmful for the IC 555.

Circuit Diagram of Water Sensor

Fig-1: Water Sensor/Rain alarm circuit diagram

Ceiling fan wiring diagram - with capacitor connection

Simple Wiring diagram of ceiling fan


Fig-1:  Ceiling fan wiring diagram

This is a simple illustrated circuit diagram of ceiling fan. To be noted that the wiring diagram is for AC 220V single phase line with single phase ceiling fan motor. Here a simple SPST switch is used to supply power or not to the fan motor and a Regulator is used to controlling the fan speed. Though it is very simple, but one thing to be noted that Switch and Regulator should be connected with the phase line of main power, not neutral.

Heat Sensor Circuit Diagram

This simple heat sensor circuit could senses heat from various electronics device like computer, amplifier etc. and generate warning alarm. It could senses heat from environment also, but here I mention “electronics device” because it is being using mostly in electronic device to protect them from overheat.

Circuit diagram of heat sensor:

Fig-1: Schematic Circuit Diagram Of Heat/Temperature Sensor

7805 Voltage Regulator Circuit

A voltage regulator is used to produce a constant linear output voltage. It’s generally used with AC to DC power supply. And also it can be used as well as a DC to DC voltage converter . To regulating low voltage, most used device is one single IC. 7805, 7812, 7905 etc. 78xx series are design for positive and 79xx series are for Negative voltage regulator.

7805 is a three terminal +5v voltage regulator IC from 78XX chips family. See 7805 pinout below. LM78XX series are from National Semiconductor. They are linear positive voltage regulator IC; used to produce a fixed linear stable output voltage.  National Semiconductor has also negative voltage regulator chips family, they indicate with LM 79XX. 78xx is used more than 79xx because negative voltage has a few usability purposes as we see.
I was previously posted a 5v regulated power supply circuit using 7805 IC, that circuit and this 7805 voltage regulator circuit is almost the same.


Circuit diagram of 7805 Voltage Regulator



Fluorescent Light Wiring Diagram | Tube Light Circuit

This post "Fluorescent Light Wiring Diagram | Tube Light Circuit" is about how to wiring fluorescent light and "how a Fluorescent Tube Light works". The wiring process of fluorescent tube lamp/light with Ballast,Starter is quite easy and simple. In most cases when we buy a fluorescent light it comes in a complete set with all wire connected. If you want do it yourself (DIY), you can buy all the parts individually. And you can complete all connection of the fluorescent light/lamp with the help of this wiring circuit diagram.

Fluorescent Light Wiring Diagram


Fig: Fluorescent Light Wiring Diagram

Main parts of Fluorescent Tube Light:

     1.Fluorescent Tube
     2.Ballast
     3.Starter
     4.Holder, wire etc.

Electrical Schematic Symbols

Electrical Schematic Symbols:

Electrical circuit schematic symbols are graphical sign, that is used to design electronic, electrical circuit schematic diagram. There is a quite adequate collection of symbol for electrical, electronic circuit. You can use this high quality schematic symbols to design your own schematic circuit diagram. Download high quality electrical schematic symbols image.



Ceiling Fan Regulator Circuit - Motor Speed Controller

This is a simple ceiling fan regulator circuit diagram tutorial. It is used to control the speed of a ceiling fan. In the other words it is an AC motor speed controller circuit, as because it's control the speed of a AC motor(Ceiling Fan).  This ceiling fan regulator circuit built with few numbers of parts. The circuit mainly  based on Z0607 TRIAC. This is a low power AC semiconductor device. Generally which is used to controlling speed of low power ac motor speed. 

Circuit Diagram of Ceiling Fan Regulator :


Fig: Ceiling fan regulator (AC motor speed controller)  Circuit Diagram

In this ceiling fan regulator circuit, R1=500KΩ is a variable resistor that is used to adjust the fan speed. Capacitor C1 2A104J is a Polyester film capacitor.

Dark detector circuit using LDR, LED

This is a basic dark detector/sensor circuit diagram based on a Photo Resistor (LDR) and  few numbers of parts.

Parts list of dark detector:

R1 = 330Ω Resistor
R2 = 1KΩ Resistor
R3 = 1k Variable Resistor
Q1, Q2 = BC547 Transistor
One Photo Resistor (LDR)
One 6V DC power supply or Battery

Circuit diagram of dark detector/sensor:

dark detector circuit diagram
Fig: Circuit diagram of dark detector/sensor

What is Schematic Diagram (Definition)

What is schematic diagram

Definition of schematic diagram: Schematic diagram is a visual presentation that describes the interconnection between device and power with enough detail to assemble an electronic circuit.

For example this is a schematic diagram of FM receiver:



5 LED VU meter circuit diagram using KA2284

This is a simple circuit diagram of 5-LED audio VU meter using IC KA2284/KA2285. The KA2284, KA2285 are monolithic integrated circuit. It is a logarithmic display driver IC. And it is Bar type display driver using 5-Dot LED. The KA2284/KA2285 has a wide range supply voltage capacity of 3.5V-16V, but we recommend to use about a 12VDC power supply.

Circuit Diagram:


Fig: 5-LED Dot/Bar (VU meter) circuit diagram

LA4440 Amplifier Circuit

LA4440 is a dual channel audio amplifier IC. It can be used in two modes; one is Stereo amplifier and another Bridge amplifier mode. The LA4440 is a monolithic linear IC from Sanyo. Here I give the both circuit mode of amplifier using IC LA4440.

Features of IC LA4440

  • It has 46dB of ripple rejection
  • Low distortion
  • Good channel separation
  • Thermal protector
  • Overvoltage protector
  • Surge voltage protector

LA4440 Stereo Amplifier Circuit

When the IC LA4440 is Stereo mode in the circuit, its output power is 6w+6w. In stereo mode use two pieces speaker of 2Ωto8Ω.
In the stereo amplifier configuration given below, C11 and C12 are output capacitor. But i ignore them from the circuit of bridge amplifier.

Fig-1: LA4440 Stereo Amplifier Circuit Diagram

Simple Circuit Diagram for Amplifier by TDA7052

This is a very small and simple Circuit Diagram for Amplifier of 1W mono audio output. The amplifier is based on a single IC TDA7052. It is in 8-pin DIL (Dual-In-Line) package. The IC TDA7052 is specially designed for battery-operated audio circuit for amplifier like tape recorders, radios etc.

Circuit Diagram of Simple 1W Audio Amplifier:

Fig: Simple Circuit Diagram for Amplifier
The power supply for this amplifier is 3V to 12V, but we recommend to use 6V power supply. If you want to going with battery, no problem the amplifier can also operate by even 3V Battery cell . The IC TDA7052 no needed any Heat Sink. In the circuit R2 is a Variable Resistor, used as volume controller. Capacitor C1&C2 used to filtering the supply voltage. If battery is used instead of power supply then it(C1&C2) isn’t needed anymore in the circuit. Use an 8Ω speaker at the output to hearing the mono amplification of audio.
红包扫雷游戏规则公告大全 红包扫雷app系统 聊呗红包扫雷控制开挂软件下载 红包扫雷接龙免公众号 仿微信红包扫雷源码下载