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Tb2901hq Car Audio Amplifier Circuit Schematic Circuits
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The Subwoofer Filter Circuit Allows The Addition Of Subwoofers To An
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handmade gsm gps tracker second edition
New uTracker on GE865 Small size. New edition of tracker (SIM300DZ, EB-230/LEA-5S). Add OBD-II (ISO) sensor, accelerometer and RFID reader. Add TR24 2.4GHz module except USB link to host. Change all to SPI (free 3 pins to buttons ?) Add u-blox LEA-5S.
Simple SWR Protection Circuit Easy to build
Here is a simple SWR protection circuit you can easily build. The directional coupler and detector components are from an old VHF SWR meter. You may want to replace the meter`s existing RF bypass Capacitors with higher quality (mica) ones. You may also want to replace the line coupler`s termination Resistors which higher wattage ones. Be sure to us
PWM Speed Rotation Forard-Reverse and Regenerative Braking
This is PWM Speed DC motor Rotation circuit. It can Forard-Reverse and Regenerative Braking function. By this circuit use a signal PWM control the speed of DC 12V motor with Power mosfet IRF150. The relay RY1 use control Reverse with the digital alarm, change, Q10. The Relay RY2 work be, function brake resistor. By control Run or stop with the
FM Radio Receiver Circuit for Battery Supply
This is a schematic for radio receiver circuit. This circuit is based on the TDA7088T that can be used in mono portable and pocket radios. This is a bipolar integrated circuit. This is the figure of the circuit; When a minimum of peripheral components (of small dimensions and low cost) is important, we can use TDA7088T. Frequency-locked -loop (FLL
Pulse Width Modulators using LM339
The first example uses the standard op-amp oscillator circuit to generate a triangular waveform which is level-shifted and fed to a comparator (e. g. LM339) to give the PWM waveform. Most people will want to use two comparators rather than one op-amp and one comparator so that is what we show here. Disclaimer All files are found using legitimate se
12V Battery Charger for Lead/Acid
The battery charger circuit below is very simple to build requiring only a handful of cheap parts and an extra winding on your power tranny (or a separate tranny). Since the charger described is not active during sound reproduction, I have made no criteria on parts quality, so el-cheapo was the way to go. There are many circuits available for char
BC337 Light Relay Switch By BC547 &
Disclaimer All files are found using legitimate search engine techniques. This site does not and will not condone hacking into sites to create the links it list. We will and do assume that all links found on the search engines we use are obtained in a legal manner and the webmasters are aware of the links listed on the search engines. If you find
ICL7107 Digital LED Voltmeter
This circuit is a digital voltmeter with LED display. It`s ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199. 9V with a resolution of 0. 1V. The voltmeter is based on single ICL7107 chip and may be fitted on a small...
Automatic 12V Lead Acid Battery Charger
R2 will have to be adjusted to set the proper finish charge voltage. Flooded and gel batteries are generally charged to 13. 8V. If you are cycling the battery (AGM or gel) then 14. 5V to 14. 9V is generally recommended by battery manufacturers. To set up the charger, set the pot to midway, turn on the charger and then connect a battery to it`s...
Railway Grade Crossing Circuit
The protected section of track can be as long or as short as desired and does not have to be the same length on both sides of the crossing. The circuit works in both directions and can be connected to other grade crossing circuits to provide fully automatic protection for multiple track crossings. The Grade Crossing circuit provides prototypical o
Subwoofer Filter circuit and explnation
Here is the ambit diagram of an opamp based subwoofer filter. Audio frequencies beneath 200Hz are advised to be in the subwoofer range. So a subwoofer clarify will be about a low canyon clarify with a cut off abundance of 200Hz. The alive of this beeline advanced ambit is as follows. The larboard approach of the audio antecedent is affiliated to th
Beat Balance Metal Detector
Here`s a metal detector circuit that frequencies of the two oscillators are then mixed in similar fashion to BFO, to produce an audible heterodyne. On the surface of it, this design would seem to represent little more than a twinned BFO metal detector. What makes the metal detector different above all else ( check a simple metal detector ), and si
Latest Intruder Alarm Super Sensitive circuit and explantion
Here is the circuit diagram of an ultra sensitive intruder alarm. The shadow of an intruder passing few meters nearby the circuit is enough to trigger the alarm. Here IC2 uA 741 is wired as a sensitive comparator, whose set point is set by R6 &R7. The voltage divide by LDR and R9 is given at non inverting pin of IC2. At standby mode these two...
The Design of Car Audio Power Amplifier
This article is for those who wants to make their own car amplifier. The basics of calculation will be discussed below. If you have understand it you will be able to make car amplifier yourself. Actually the difficulty of designing the car power amplifier does not lies with the audio power amplifier, but it is more to providing the switching power
The Link Telephone Intercom Every Home Should Have One!
The Link circuitry is simple and efficient, employing just two ICs, half a dozen transistors, and a handful of garden variety components. It all runs on 12 volts and is easily assembled. You can have your own home intercom between the kitchen, the garage, the rumpus room and at your poolside barby` and all for less than $100! The Link intercom
Two sirens sound with ic 555
Operation of the circuit. Circuit is divided into three parts: low frequency production. The manufacturing high frequency and extension of production low frequency is obtained from IC1 connected to astable multi vibrator circuit frequency is set by R1, C2 frequencies that are coming out of pin 3 is about 1 Hz through R2 to be good 5. of IC2, a div
with scr new alarm Window foil burglar
Here is a simple but effective burglar alarm circuit that can be fixed on windows to detect break throughs. The circuit uses a fine wire element fixed as a network through the window glass for sensing the break through. Normally the base of Q1 is held to ground potential by the wire element. So Q1 will be off and SCR H1 will not be conducting, and
ZN414 Portable AM Receiver circuit and description
Designed around the popular ZN414 ic this receiver covers the AM band from 550 - 1600 KHz with the values shown. For Longwave the coil needs to be changed. Use one from an old MW radio to save time. The ZN414 is a tuned radio frequency designed and incorporates several RF stages and an AM detector. It is easily overloaded and the operating voltage
0-50V 2A Bench power supply circuit and explanation
I use the lm10 IC because it has a reference voltage and that`s useful for dc power supply. With two ICs can take different output voltage and amperage. This circuit is protected from short circuit. P2 is for controlling the current at the range of 0-2A. Stabilize the output voltage with R4 on negative pin on op-amp and with R2 & P1 on positive pin
500W low cost 12V to 220V inverter
Using this circuit you can convert the 12V dc in to the 220V Ac. In this circuit 4047 is use to generate the square wave of 50hz and amplify the current and then amplify the voltage by using the step transformer. Disclaimer All files are found using legitimate search engine techniques. This site does not and will not condone hacking into sites to
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
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