Popular Circuits Page 211
- Page 211
-
Here the simple schematic of multitone siren alarm circuit. This multitone siren is effective for reverse horns, burlgar alarms, and many others. It generates five various audio tones and is much more earcatching than a single-tone siren. T....
-
-
This ZIP file contains information about building a small radio transmitter, which has a PCB 1.75" x 2.5" (45mm x 68 mm) and has a range of about 30 yards or so. The documentation with the circuit says the freq range is 100-108 MHz, but I have found it to be....
-
-
IED is a hotel, restaurants, family common and effective tool for the eradication of mosquitoes, as shown in Figure 16-12a. Diode voltage doubler rectifier circuit manner to produce a high voltage. When mosquitoes see the light, toward the IED when high....
-
Range precision voltmeter electrical schematic in Figure (a) below. Amplifier circuit and a number of high-precision components, which greatly improves the performance range of the voltmeter...
-
This circuit is quickly charging the battery. If you need a faster charger, this circuit is recomended to you. And this charger is low temperature, the temperatur is 5 degree celcius. Input Voltage is 15 Volt DC, and Output voltage to charging 6 -12V and you....
-
-
Switchable Output Crystal Oscillator Circuit This oscillator circuit permits crystals to be electronically switched by logic commands. The circuit is best understood by initially ignoring all crystals. Furthermore, assume that a....
-
This Bells Ring Generator using MC14106 or 40106 Hex Schmitt Inverter IC generates a dual-tone bells ringing similar to most door-bell units....
-
One type of regulator of tone / tone controls are the Audio Graphic Equalizer. Audio Graphic Equalizer have 2 kinds in my opinion. Namely Audio Graphic Equalizer Bar and the type of parametric type is often called parametric equalizer. Audio Graphic....
-
FM Radio Receiver IC TDA 7012T is very simple, but it has an FM radio receiver sensitivity and good selectivity. Single Chip FM Receifer cool name of IC TDA7012T 7012T TDA is to build an FM receiver requires a few additional components. Feature contained in....
-
Amplitude modulation (AM) is a technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. AM works by varying the strength of the transmitted signal in relation to the information being sent. For example,....
-
-
The SPC2 is a solar power center, it can be used to handle all of the power functions for small 12 Volt solar powered devices. It contains a photovoltaic charge controller and a low voltage load disconnect circuit. The low voltage disconnect has a load....
-
It`s supposed to reduce the max. voltage between the GPIO input pin and the current source to 3. 3V, since 5V * (10K/(10K+5K) = 3. 3V. The thing is - 3. 3V is the voltage over the 10K resistor and 1. 7V is the voltage over the 5K one. As long as the current....
-
This de adapter provides a regulated 9-V source for operating a Kenwood TR-2500 hand-held transceiver in the car. The LM317T"s mounting tab is electrically connected to its output pin, so take this into account as you construct your version of the adapter. ..
-
Six LEDs are arranged to produce a display the same as the dots on a dice. When PBI is depressed, the display is blanked and the oscillator (ICl a, b, c) clocks IC2 at about 1MHz. IC2 counts from zero and resets on seven..
-
The primary goal for this project is to utilize the 555 timers to detect a motion in the nearby environment. The output of this circuit will light LED and make an audible sound like an alarm...
-
-
This is a simple video transmitter that can transmit as far as 50 meters. This video transmitter can be used with the camera or other video sources. You can view them on VHF channel analog TV. Supply voltage to the video transmitter can use 9V battery.....
-
At high frequencies, q, Cz can be seen as a short circuit (i.e. RPi not present), as shown in Figure 4-6 (a) in the apparatus shown in FIG equivalent to 4-6 (b). Then there are..
-
This is a 7 tube 20 watt amplifier that must be used in conjunction with a pre amplifier having volume an tone controls. For this, I recommend this 6 tube pre-amp. With this amplifier you may use 6BQ5 output tubes. A 5U4-G rectifier is used so that the power....
-
Using two operator triangular wave oscillator A practical application of the relaxation oscillator using a voltage comparator to perform the switching function, FIG. 2 is the use of composition operator triangular wave oscillator...
-
The 751 required turning the volume control almost to 12 o`clock before getting any hearable volume so I thought maybe something was wrong here. I replaced all the electrolytics associated with the audio path, i. e. after the detector stage and the audo amp.....
-
This very simple circuit uses a transformer, two diodes, a capacitor and an ammeter. To charge a battery just connect the + and terminals of the circuit to the corresponding terminals of the battery. When the battery is not charged, the ammeter reading shows....
-
This circuit uses the output of the IGL8049 to control the frequency of the IGL3038 waveform generator; the 741 op amp is used to linearize the voltage-frequency response. The input voltage to the 8049 can be, for example, from the horizontal sweep signal....
-
Differential input stage uses the integrated differential charge 2SC15 8 3 and 2SA798, the amplified signal is VT3.VT4 direct anyone to the power amplifier tubes VT5, VT6. Poor..
-
Circuit shown in Figure 3-69. It applies to require frequent timing control motor reversing operation of the occasion. Drawing, thyristor Vl,..
-
Here is a design for a DC motor speed control featuring: Efficient PWM H-bridge MOSFET architecture. Supply (battery) voltage range from 4.2 to 13 volts. High current capacity for driving large motors (65 amps max). Input compatible with standard RC hobby....
-
My question is what part of the circuit controls the lowest rpm that can be achieved with your circuit? I`m getting a range of 1400-3700 rpm on my motor with your circuit and want to tinker it a little bit for a slightly lower rpm...
-
A feedback amplifier having closed-loop gain, Af greater than unity can be obtained by the use of a positive feedback. This result also satisfies the phase condition and thus results in the operation of an oscillator circuit. An oscillator circuit then....
-
The driver circuit (see the complete schematic) has 4 main sections:
* the voltage definition,
* the integrator,
* the current booster, and
* the foldover. The schematic is drawn so that higher voltages are toward the top and lower....
-
As shown for the wideband sinusoidal voltage controlled oscillator circuit. The circuit oscillation frequency is determined by integrating resistor R and a capacitor C, voltage..
-
-
TV video processor. The EGG 1134 contains a picture IF amplifier, avideo detector,a video amplifier,keyed AGC with noise immunity, delayed AGC for thetuner, an AFT amplifier, a sound IF amplifier, asound carrier detector, a4.5 MHz sound carrier amplifier and....
-
-
This circuit adds a VLF AM component to an audio signal. This effect is widely used in musical instruments. U1C, a phase-sh..
-
The GLMDA is designed to detect the motion of a human or animal both in daylight and at
night and to provide a normally open relay output that can be used to activate many types of
loads. The GLMDA also has terminals for connecting an optional photocell....
-
The only downside to a single opamp stage is that it inverts the signal so needs another inverting buffer to put it back again (if absolute phase is important to you). I have seen bunch of schematics with both configurations but I don`t know which one would....
-
Field Effect Transistor is an amplifying device in which the output current depends on the input voltage. The FET Pre Amplifier described here is a sensiti....
-
-
This preamplifier was designed for low resistance sources like moving coil heads (MC). The circuit uses in parallel three duble transistors SSM2220 or MAT03 and by forming a diferential amplifier keeps noice low. Connecting this amplifier in front of a OP27....
-
Mobile robots are used in many industrial, commercial, research, and hobby applications. This project is about the control of a mobile robot using servomotors. The robot used in this project is the base of a popular mobile robot known as Boe Bot, developed....
-
A microcontroller (MCU) is a small computer in a single integrated circuit consisting of a CPU is relatively simple combined with support functions such as crystal oscillators, timers, sensors, serial and analog I / O etc. Microcontroller designed for small....
-
To assure that USB and serial segments are electrically isolated, we used an optocoupler (U1). The LED section of U1 is driven directly by DTR, so we should select a very sensitive optocoupler to prevent too much current flow from DTR (which is usually very....
-
In this circuit we demonstrate how to use SCRs to control low-voltage pulsating DC to operate homemade LED light panels. While in this circuit I use the Arduino, the concepts should work with any number of micro-controllers using either hardware interrupts....
-
Pyroelectric infrared sensor head is same with the figure. When it detects the human body infrared signal in guarding zone, the sensor head will output a positive jump pulse signal, this signal is added to input terminal P point. IC1 adopts 555 time base....
-
This circuit can be used to charge Accu and cells battery, the circuit can has a very stable output that would make the battery last longer and maximize the added battery capacity. When charge was also quite fast, so it can optimize the time. A diac is used....
-
FM Broadcast Audio Transmitter The circuit consists of a frequency modulated oscillator, an audio preamplifier with pre emphasis to supply the frequency modulating signal, and a buffer amplifier to drive the antenna connector FM radio pirate Introduction to....
-
With the wide application of SMT technology in products such as the computer, network communication, consuming electron and car electron, etc. , the assembly of the electronic product prones to complicating, high precision, melting and multi-functional....
-
A noise generator with a wideband output signal is always handy to have around when you`re adjusting receivers and other types of HF equipment. Simple RF Noise Source Circuit Diagram: read more †’..
-
The circuits on this page are for motor controls using Push buttons and would typically be found in commercial and industrial installations.
The circuits do not show the wiring of the motors themselves as this depends on the particular motor type. The....
-
-
An embedded system which is used for tracking and positioning of any vehicle by using Global Positioning System (GPS) and Global system for mobile communication (GSM). In this project AT89S52 microcontroller is used for interfacing to various hardware....
-
-
Flyback LED drivers are versatile because they can be used for applications that have input voltages above or below the required output voltages. They lend themselves to a simple circuit configuration that keeps the LED current constant without using....
-
A few months ago as I was surfing on the net, I saw an oscilloscope based on PIC18F2550 microcontroller and a KS0108 controller based graphical LCD. That was Steven Cholewiak's web site. I had never seen before so amazing microcontroller-only oscilloscope.....
-
The serial interface is working fine (Read the ID register correctly) but for some reason the on-chip current sources doesn`t seem to work. I have connected 470E resistor on IOUT1 and have configured the IO register (Value 0x03) so that 1mA is sourced on....
-
This solid state relay circuit uses 120 volts household mains and should only be attempted by someone that has the knowledge and skills to safely construct such a project. Otherwise personal injury and or property damage could result...
-
High quality audio amplifier for computer circuit diagram. The electrical circuit of the amplifier is shown in Fig. 1. For its production is chosen in a typical IC TA8205AN inclusion. Usually it is applied to a Hi-Fi class due to low harmonic distortion.....
-
This 9-minute timer switch can be used to control the light in a toilet or bathroom. The timer is started by pushing S1 and stopped by pushing S1 again. If you forget to turn it off, the controlled light will go off after nine minutes. If you need the light....
-
aquarium design, dpdt relay, 12v inverter: ONE: The relay you have selected is rated plenty sufficient for a 400 watt load. TWO: The 12v dc relay, transformer and diodes are using very little power so efficiency is of little concern. THREE: How are you....
-
This timer circuit is similar to the 5 to 30 minute timer except that when switch S1 is closed, the on/off actionof the circuit will continue indefinitely until S1 is opened again. A 7555 time and low leakage type capacitor for C1must be used. The 6 way....
-
-
A 100 second delayed turn ON relay RL1 switch, if plug power +12V in circuit. In Fig.2 see a two range 6-60 second and 1-10 minute auto turn off relay timer circuit, with 555...
-
My Machtech tester is capable of metering the capacitors, but is very complicated to measure short lead capacitors, not speaking about SMD ones. Also, I needed to measure the coils. In I found some LC meter schematics. It was quite interesting and capable to....
-
Have finished documenting/cleaning the code for my Jaycar el-cheapo Thermor/BIOS branded wireless weather station receiver. The basis for the code comes from the Practical Arduino weather station receiver project. In the end all it took was a week of....
-
It is good idea to put this circuit in a box and mark/write each LED with number 1 to 6. Now, when switch S1 is pushed momentarily, any one of the 6 LEDs will glow. The Number marked for glowing LED becomes dice`s output. Every time S1 is released, new LED....
-
The model 4017 integrated circuit is a CMOS counter with ten output terminals. One of these ten terminals will be in a "high" state at any given time, with all others being "low, " giving a "one-of-ten" output sequence. If low-to-high voltage pulses are....
-
This is a very useful circuit for those who want to transform a stereo Power Amplifier, to mono, bridging two channels from him , reversing the phase of the one power amplifier [R] and the polarity, with these connections we can have 4X times the output....
-
A tiny comparator (MAX9060/MAX9061 or MAX9028) protects the LED driver in a backlit display when you disconnect the LEDs, by generating a shutdown signal that removes the LED voltage....
-
The circuit can also be triggered by logic ICs(TTL/CMOS) using proper interfacing method. I usually use another relay that serve as the trigger button when interfacing ICs to latching relay circuit. ..
-
You can see that circuit is complete and bulb is ON. Suppose you want to OFF bulb from the upper switch at top of stair, simply Switch OFF the switch then circuit will break and the bulb will be OFF. You can switch ON the bulb again to switch ON this Switch.....
-
The circuit shown in Figure 1 uses only two ICs, and has a bandwidth that is adjustable from more than one octave down to a tenth of an octave. As shown, the frequency range is 20 Hz. to 20 KHz. in three bands, although a fourth subsonic band could be added....
-
PT2350 is a tone control subwoofer cross-over low pass filter chip utilizing CMOS Technology. It features a tone control range of + 10dB (50Hz, 4 KHz) and subwoofer low pass filter of the second order Sallen Key Design. The roll-off point can be adjusted by....
-
LochMaster is a developers tool for stripboard projects. It has useful functions for designing, documenting and testing a board. Therefore you will find features like auto-generation of components lists, a connection test, an editable library with a large....
-
This infrared alarm barrier can be used to detect persons passing through doorways, corridors and small gates. The transmitter emits a beam of infrared light which is invisible to the human eye. The buzzer at the output of the receiver is activated when the....
-
The very small DC voltages at the output of the diode detector are difficult to amplify accurately. DC offsets introduced by any op-amp are the main culprit. Low frequency noise (1/f noise) is another. Chopping the DC with MOSfet switches is an excellent way....
-
The circuit given here is designed as an LED flasher which produces a rotating effect when the LEDs are arranged properly. The circuit has very low current consumption and can be operated from even 3V button cells. The IC 1 (CMOS NE555) is wired as an....
-
The simple and inexpensive circuit in Figure 1 generates two PC-controlled analog reference voltages. You supply a wall-adapter supply and a parallel connector, and the circuit is ready to run. The circuit uses two 12-bit AD7243 DACs, which require only one....
-
The circuit shown above can be used to control a unipolar stepper motor which has FOUR coils (I've swiped it off an old fax machine). The above circuit can be for a motor current of up to about 500mA per winding with suitable heat sinks for the SL100. For....
-
RF amplifier Q3 to diode D1-D4 in the mixer, Q1-Q2 through T1 and T2 provide liquid oxygen injection 10MHz for D1, U1A and U1B and U2 is an audio amplifier. Detailed information is shown in the figure T1 and T2. ..
-
12V DC power supply circuit A typical 1V DC power supply circuit as shown in FIG. The figure for the power supply transformer Tr, which the mains voltage to the required two gr..
-
Supply voltage: 12 V. Supply current: 10 mA in stand-by, max. 80 mA. Input voltage: min. 20 mV rms. Indication range: 30 dB. LED currents: 7 mA. Ref. voltage of IC2: 5 V..
-
The Johnson digital counter or Twisted Ring Counteris a synchronous shift register with feedback from the inverted output (Q`) of the last flip-flop. Q` of the last flip flop is connected back to the input D of the first flip-flop. This inversion of Q before....
-
-
One of the author`s physics projects required an accurate 1-Hz (seconds) clock signal. Unfortunately, precision 10-MHz quartz crystals are expensive, while another problem was found in the inability of most common or garden 40xx CMOS logic chips to work at....
-
Working principle of the circuitThis medical electric aspirator waterproof controller consists of the power supply circuit, liquid level detection control circuit and alarm circuit, see as figure 9-47. The power supply circuit consists of the switch S1,....
-
Figure 39-2"s circuit combines a low-noise op amp, IC1, with a chopper-based carrier-modulation scheme to ..
-
About solid (body) relay AC solid state relay (AC-SSR) of the basic application circuit shown in Figure (a) below; With TTL drive SSR circuit is shown in (b) below; SSR with CMOS driver circuit is shown in (c) below; SSR thyristor drive circuit shown in (d)....
-
-
Using TOP269EG off-line switcher IC, (U1), in a flyback configuration can be designed a very simple high efficiency notebok laptop power adapter. TOP269EG IC has an integrated 725 V MOSFET and a multi-mode controller. It regulates the output by adjusting the....
-
This is an on-off control with isolated, low voltage input. Since the switching action is very rapid, compared with the response time of the lamp and the response of the eye, the effect produced with audio input is similar to a proportional control circuit..
-
High frequencies are here defined as those above 50, 000 cycles per second. For industrial power supply the Golpitts circuit, Fig. 28-1, or the coupled-grid self-excited oscillator circuit, Fig. 28-2, is most commonly used. In either circuit, the alternating....
-
-
Circuit power amplifier circuit in the figure below is a schematic circuit power amplifier with output power of 70 watts and operates on a class AB. Power amplifier Circuit has been equipped with a tone control circuit. Scheme 70 watt power amplifier circuit....
-
A motion detection alarm circuit using a PIR.SENSOR motion detection, if the move is a positive light from the PIR sensor, triggered by a delay circuit, Q1 and....
-
AVRDude is excellent program for burning hex code into microcontroller. USBasp is awesome USB based programmer for the AVR. In this tutorial we will see how to use AVRdude for burning hex files into AVR microcontroller using USBasp. AVRdude is not readily....
-
-
Imagine you are relaxing and reading your favorite novel while listening to music on your computer, suddenly you want to skip the current song or want to pause your mp3 player. Infrared Software : This decodes the electrical signals and takes action to....
-
Anyone who is interested in home construction will at some time or other have the need to measure the inductance of small coils. This can be a difficult problem, as commercially made equipment of sufficient accuracy is often far too expensive for occasional....
-
In 2011, designing a frequency converter circuit consists in most cases of picking out an IC that has the characteristics you need from a gain and mixer spurious product standpoint, add a couple filters, and a power supply. In many cases the oscillator is....