Diagram Plus guide

For car alarms, emphasis should be put on hearing the audible alert and identifying it as belonging to your wheels. Unfortunately, modern car alarm systems seem to have more or less the same alarm sound especially if they are from the same brand. Also, to comply with legal noise restrictions, the alarm sound is not always loud enough to be heard if the car is parked down the road. Simple Car Alarm Sound Booster Circuit Diagram The circuit shown here is designed to help boost the alarm sound by also...

This is a simple ultrasonic mosquito repeller circuit diagram. The circuit is design on the theory that pests like mosquito can be repelled by ultrasonic frequency around (20KHz-25KHz). This ultrasonic mosquito repeller circuit is based on a single CMOS IC CD4017. C1,R1 & VR1 is used to adjust the output frequency.Circuit Diagram:Fig: Ultrasonic mosquito repeller circuit diag...

This is the simple 1-Ma Current Sink Circuit Diagram. A fixed current flows through any load that is connected between the positive supply and Ql`s collector. The non inverting terminal of the op amp is grounded, and negative feedback flows between the output of the circuit (Ql`s emitter) and the inverting terminal. The voltage across Rl is thus equal to the voltage at the inverting terminal (approximately 0.55 V), so a fixed current of about 1 mA flows through the load, Ql`s emitter, and Rl. 1-Ma...

     Using this low-cost project one can reproduce audio from TV without disturbing others. It does not use any wire connection between TV and headphones. In place of a pair of wires, it uses invisible infrared light to transmit audio signals from TV to headphones. Without using any lens, a range of up to 6 metres ispossible. Range can be extended by using lenses and reflectors with IR sensors comprising transmitters and receivers.     IR transmitter uses two-stage...

In this tutorial we are going to learn how to design and simulate a circuit schematic in CircuitMaker 5. For example we are going to design a 12V to 5V  dc-dc converter circuit diagram.  This is the circuit below that we are going to design. Fig-1: 12V to 5V  dc-dc converter circuit diagramLet’s start design the circuit in circuitmaker 5. Step-1: Open a new document.Go to “File>New” as shown below or simply press “CTRL+N”   This will opened a new workspace named...

Then find someone that you enjoy doing it with - a friend, your dog or do it on your own and make it your time to focus on your body and empty your mind!If you are just too tired to exercise, try just walking around the block everyday, maybe twice a day. Then increase the number of times around the block as your energy builds and your stamina increases. There may be days when even this is too much. On those days, simply honour the messages from your body, without being hard on yourself, and give...

Now here’s a digital lock unlike any other, as  it has only two buttons instead of the usual  numeric keypad. The way it works is as simple  as its keypad. Button S1 is used to enter the  digits of the secret code in a pulsed fashion-i.e. the number of times you press the but-ton is determined by the digit to be entered.  A dial telephone uses the same type of coding (now maybe there’s an idea?). Press four  times for a 4, nine times for a 9, etc. Pressing button S2...

How to Build a Programmable Zener Circuit Diagram. The ICL8212 is connected as a programmable zener diode. Zener voltages from 2 V up to 30 V can be programmed by mostly suitable selecting R2. The zener voltage is: Because of the absence of internal compensation in the ICL8212, CI is necessary to ensure stability.  Two points worthy of note are the extremely low-knee current (less than 300 ) and the low dynamic impedance (typically 4 to 7 ohms) over the operating current range of 300 to...

This is the Shift Register Driver Power Supply Circuit Diagram. A16 V power supply can be synthesized as shown using IN1692 rectifiers. A shift pulse input saturates the 2N2714 depriving the Darling-ton combination (2N2714 and 2N2868) of base drive.The negative pulse so generated on the 15 V line is differentiated to produce a positive trigger pulse at its trailing edge. Shift Register Driver Power Supply Circuit Diag...

        This circuit using a dual-timer NE556 can produce 1Hz pulses spaced 5 seconds apart, either manually or automatically. IC NE556 comprises two independent NE555 timers in a single package. It is used to produce two separate pulses of different pulse widths, where one pulse initiates the activation of the second pulse.        The first half of the NE556 is wired for 5-second pulse output. When slide switch S2 is in position ‘a’, the first time is...

More and more people are using a PC (conventional or notebook) to view films. The VGA output can be used to provide a matching ‘Ambilight’ effect for this. If you restrict your-self to a single RGB LED, you can also draw the power for this circuit from the VGA connector, along with the RGB signals. The following pins of the 15-way VGA connector (three rows of five pins) are used for  this circuit:Pin 1:  Red video signal Pin 2:  Green video signal Pin 3:  Blue video...

When looking for a quality laser pointer, the first thing that you should do is to ask yourself on what standards of quality you are looking for in such products. Many people want a pointer that will last for a long time. This means that they will no longer be bothered by always changing the device. Aside from that, having a quality product that will give quality results for a long time can actually save you money. If you want to be sure about the quality of the laser pointer that you are going...

This sensor is particularly suitable for use in small spaces, such as the petrol tank of a  motorbike. It has the advantage of not having any moving parts, unlike a conventional sensor with a float and float arm that make it difficult to fit in a tank. The sensor circuit is made from standard, inexpensive components and can be put together for little money. Petrol/Diesel Level Sensor Circuit diagram : The operating principle is  based on  measuring  the forward volt-ages of two...

Requestors are as many as cell phone jammer Obviously, if we choose the conditions to determine if else, to judge the success of the conditions in the final else, we will unfortunately have to get to the data compared with all possible scenarios, a switch is the efficiency of many, will jumped into the branch we need this code is written in the run thread, that is, before closing the game will be an unlimited number of execution, we add a counter in the run thread, and then entered the game in figures...

This low cost bass treble circuit consists of some capacitors, resistors, and two T/C pot for BASS and TREBLE control. this circuit can be made without even a veroboard. You just solder components as this circuit network is not so complex. It has only two-pin parts. Let’s take a look at he circuit diagram. Nothing to say about it, as it is so simple that a beginner level hobbyist can even understand and build this circuit.But there are some -ve points of this circuit which I must say, after giving...

This is a Simple Power Pulse Using by LM350 and NE555 Circuit Diagram. This circuit can use to drive lamp,power LED,DC motor etc. Adjust R5 for output amplitude.Adjust R1 for output power .Power Pulse Circuit DiagramThe LM350 is adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 3A over a 1.2V to 33V output range.This circuit requires 5-15V power supply....

This is the simple Lcd Display Power Supply Circuit Diagram. Laptop computers often use large-screen LCDs, which require a variable and a negative supply to ensure maximum contrast. This circuit operates from the system`s positive battery supply and generates a digitally variable negative voltage to drive the display. This figure`s switching regulator creates a negative voltage from the battery supply. The microprocessor data bus drives a 4-bit DAC, which in turn varies the actual regulator output...

    Here is a Hobby Circuit for electronics hobbyists that can switch on & off a light, Fan, Radio etc. by the sound of clap.The sound of clap is received by a small microphone that is shown biased by resistor R1 in the circuit. The microphone changes sound wave in to electrical wave which is further amplified by Q1.Transistor Q1 is used as common emitter circuit to amplify weak signals received by the microphone. Amplified output from the collector of transistor Q1...

         Simple Logic Processor Circuit or you can say a simple computer.               Picture of our Logic Gate Project      We have made three logic gate in our project. 1st is OR Gate, 2nd is AND Gate and 3rd one is NOT Gate.  LED’s as indicator glows to show output level high or low.Here we have kept glow as “1″ and dark for “0″ This circuit...

The compact, low-cost condenser mic audio amplifier described here provides good-quality audio of 0.5 watts at 4.5 volts. It can be used as part of intercoms, walkie-talkies, low-power transmitters, and packet radio receivers. Transistors T1 and T2 form the mic preamplifier. Resistor R1 provides the necessary bias for the condenser mic while preset VR1 functions as gain control for varying its gain. In order to increase the audio power, the low-level audio output from the preamplifier stage is coupled...

Here is a VLF receiver tuned to 300 kHz designed to detect the crackle of approaching lightning. A bright lamp flashes in sychrony with the lightning bolts indicating the proximity and intensity of the storm. Figure 1 shows the simple receiver which consists of a tuned amplifier driving a modified flasher circuit.The flasher is biased to not flash until a burst of RF energy, amplified by the 2N3904, is applied to the base of the 2N4403. The receiver standby current is about 350 microamps which is...

A DTMF-based IR transmitter and receiver pair can be used to realize a proximity detector. The circuit presented here enables you to detect any object capable of reflecting the IR beam and moving in front of the IR LED photo-detector pair up to a distance of about 12 cm from it. The circuit uses the commonly available telephony ICs such as dial-tone generator 91214B/91215B (IC1) and DTMF decoder CM8870 (IC2) in conjunction with infrared LED (IR LED1), photodiode D1, and other components as shown...

The material test of cell phone booster cannot be cancelledFurther established the worlds largest cell phone users status. Industrial scale, concentration increased as of April 2007, 41 new cell phone companies, including 11 foreign-invested enterprises, Chinese enterprises to 30, with production capacity of about 140 million while the new cell phone manufacturers in the low-end products based mainly on the Chinese market, the annual demand of about 60 million to 100 million units, made in China...