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This simple cable tester can be used to check 2 wire cable such as coax cable, telephone cable, audio cable and etc. Power the circuit using 9V battery. Plug in the cable and push "TEST" button. The dummy resistor is connected to the end of the cable which....
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Widely available AA NiMH battery chargers are in the market, even those already in a single package that can be used to charge other battery types such as NiCd, NiCad, and other types. Battery charger in this project is designed for two AA NiMH or NiCd cells....
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Wireless headphone transmitter receiver now widely available in the market with a variety of pricing options with a reliable technical specification for a variety of allocations which include wireless headphones for tv or tv headphones, wireless earbuds,....
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a year ago I designed a class-D amplifier based on the TAS5162, pcm1808 and TAS5086. During the year, was made a few hundred samples intended to be sold to radio amateurs. Most devices are functioning properly and not cause any complaints from consumers. But....
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I am looking for a simple circuit to simulate sensor inputs to PLC. Sensors take 12VDC and outputs 4-20mA. I was looking at your XTR series devices which seems to be able to achieve this but I am not sure which one will be ok to use for 12VDC voltage. Also,....
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The LMV116 is an enhanced slew rate version of the LMH6645. The high speed LMH devices are very sensitive to output capacitance (normally they drive back-terminated loads) and normally start oscillating with direct capacitive loads as low as 50pF. I just....
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I got oscillation issueon THS4271. The circuit schematic is as attached. The input is differential sine wave on positive and negative terminals with 10k differential resistor. The output oscillates at 300Mhz or mixed frequency as attached. Once turn off the....
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Also you have mentioned that the op amp in the second stage gets damaged. Can you confirm that by testing that op amp in a buffer configuration(or any simple configuration) I am asking you to do this because we need to know if the part is actually failing or....
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The approach you have shown would dissipate (12V)(3A) = 36 watts. This is quite a lot of dissipation so the complete circuit will get HOT. There are two possible alternatives: 1) Run the op amp from a lower supply voltage, if available. 2) Use a class-D type....
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I have designed the attached circuit for detecting how long an ultrasonic pulse need to to travel a distance. the input signal is going to be from a 40 k ultrasonic receiver. First stage is 40k Band pass - 1k pass band - differential MFB filter with a gain....
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I did some quick playing with the circuit. It is very close to sustaining oscillation. Changing R2 to 10. 5k will cause it to sustain oscillation. The original authors of the note that you reference are no longer with TI so we cannot consult with them.....
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In order to eliminate noise, I`ve used a 100uF capacitor and a 100nF bypass capacitor across the supply and two 10nF capacitors in parallel with the resistors Rda and Rdb (those are 10K each), As for the current limiting, I`ve used a 22K resistor paralleled....
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understanding of the function and sizing of the resistors Rg and Rf for the bubba oscillator circuit described on the application report SLOA060 - march 2011, page 17 figure 18. The oscillator porpuse is to develope a current inverter thru the H-bridge....
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My project is about constructing two similar EMG circuits (differing in gain) to measure EMG from two forearm muscles called the Flexor Digitorum Superficialis (FDS) and Extensor Carpi Radialis Longus (ECRL). The outputs from the EMG circuits will be....
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Unfortunately we do not have a direct example for you to run on IAR at this time. However I should be able to help you get things going. What MSP430 are you using Are you mostly concerned about setting up the SPI or reading and writing the device In a....
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I`ve designed IFA antenna in Altium as described in DN007 and created a balun circuit from the schematic design of CC2500EM Reference Design (swrr016a). I`m very new to RF designs, as I could understand from application notes and forum posts; this design....
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The "green area" is where should be placed the TRF7970A `s antenna (Between 0 ohm resistors, the antenna should be connected). TRF7970A `s antenna can be done step by step according to the document "Antenna Matching for the TRF7960 RFID Reader (SLOA135) ".....
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As found in SLAA458, the revised pulseoximeter application, I`ve attached an image of the USB schematic that is used to output collected data. I just had a few questions about this schematic. 1) What do J3 and J6 correspond to I can see the corresponding....
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Hmmm, if it is resistive, AC is equivalent to pulsed DC and the sensor is degraded in any case with the RMS value of the AC signal. If you appy 1VAC RMS, you could as well apply 1V DC. If you use an ADC10 or ADC12, the samples are take one after another....
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I am using BQ24020 charger IC to charge 120mAh Li-ion battery. I set the charge current to around 100mA. Attached is the circuit schematic. The problem I am facing is STAT1 and STAT2 signals indicate that battery is fully charged even though battery charge....
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I have finally finished my first prototype PCB but I am a bit worried about the amount of heat generated when using the BMSat max power in myapplication (ultralight hybrid electric vehicle). At 30A cont/50A burstI have almost 20Wloss. It seems to me that it....
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I have a circuit (see attached) provided by an LCD manufacturer that illustrates using the POL signal from the display to derive the VCOM signal. From what i`ve read, LCD Bias ICs generate VCOM from the high bias voltage. Is it possible to instead feed the....
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I made an hbridge using TPS2836 and CSD16404. The schematic is shown below. It does not work properly and I have a few questions about it. It would be great if you can point out where the design is wrong. 1. I gave a VDD-GND of 5V and tried to give the....
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My product requires a voltage-controlled, current-limited power supply and for a number of years I have used various switcher chips with an op-amp to feed back a current sense voltage to the feedback pin. For the last couple of years I have been using an....
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I am using the UCD90124/A, among other things, to monitor multiple voltages. Several of these are > 2. 5v so I have scaling circuits so as not to violate the 2. 5v max on the Mon inputs. My question is, do I enter the raw voltage values in Fusion for such....
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I have built several boards using the bq51013 EVM receiver circuit and a TPS61085 boost converter circuit(designed in SwitcherPRO Design Software) to increase the voltage level to 5. 7Volts. The problem that is that when a load of 580mA(required by end....
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The heart of this DIY metal detector circuit is CS209A. The metal detector is build with one 100 µH coil. CS209A has one oscillator which forms a LC circuit, the inductance of the coil will change when it is near metal objects. LED 1 will light and the....
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It uses very common building blocks. The high voltage power supply is a classical oscillator circuit used in many places where a low current and high voltage is needed. TR is a step-up transformer salvaged from a xenon light circuit. You can find simmilar....
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The complete circuit diagram is shown in Fig. 1. Heart of the system is lC2, National`s MM5402 clock chip. It is an MOS monolithic large scale integrated circuit. It`s pin configuration is shown in Fig. 2. The supply is derived from the mains through a....
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When the input signal is logic 1, the display shows `H` and the loudspeaker emits a note which is an octave higher than the `low` tone. Operation of the circuit can be seen from the circuit diagram in figure 1 and the truth table in figure 2. When the input....
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This V/I display module is eminently suitable for building into an existing DC power supply, where it gives a precise indication of the set voltage or the current consumption of the load. In the voltage range, the decimal point lights on LD3, and the....
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Simple Electronic Multimeter High cost deters many hobbyists from buying a conventional multimeter. Since it is difficult to obtain cheap 50 uAor 100uA meters which are essential for a highly sensitive multimeter, an electronic alternative device is....
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The circuit within the dotted line for a mini emergency light can be incorporated into any battery eliminator, provided the eliminator`s voltage is higher than the battery`s voltage. For greater load (1. e. for more light through a b1gger lamp), Tl should be....
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Electronic switch ES1 connects the frequency determining capacitor to the input of clock oscillator N1. The logic level that exists at the Dm terminal of IC; is shifted towards output Q at a speed that is defined by P1, which enables defining fixing times....
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This can be. increased readily by fitting a resistor in parallel with Ra, until the output voltage is5. 0 V precisely Switches S1 and Sz are preferably SPDT types with a centre position, but three-way rotary switches should also do if in both cases the....
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The circuit shows a two ”stage voltage amplifier driving a recording level meter. The AC signal input is amplified, rectified, and the resultant DC voltage shown on the meter. The circuit can be used with a tape recorder or audio mixer and should be fed from....
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The amplifiers of a LM3900N device can be conveniently used to make a mixer unit for audio purposes; the unit enables three separate audio signals to be mixed together to produce a composite output. The audio mixer circuit shown provides this facility using....
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The above cycle is therefore repeated only when S7 at the Q1 output is pressed in time. When all keys have been pressed in time and in the correct order, Q7 goes 5 high for about 4 seconds to enable driving the unlock circuitry, e. g. a relay driver for an j....
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Using a field effect transistor at the input of a schmitt trigger, means a low value capacitor can be employed. The trigger by Q1 and O2 has a hysteresis of approximately 3V. This is controlled by the 3V zenen Mth C1 uncharged O1 is off and O2 is forward....
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An useful feature of this circuit is that the frequency can be changed by changing a capacitor value, a switch can be add to choose between various frequencies...
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If the instruments have power when you turn on the key, then I would check the neutral safety switch. Based on Standard Boat Wiring Colors, follow the yellow/red wire from the starter post on the key switch to the neutral safety switch in the shifter....
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Simply you can control a relay through Pic Microcontroller. See a simple circuit for controlling a single relay with pic 16f628. When RB5 port of pic become High the relay will operate. This Circuit works with non-latching ralays(commonly used relays are....
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Standard serial interfacing of microcontroller (TTL) with PC or any RS232C Standard device, requires TTL to RS232 Level converter. A MAX232 is used for this purpose. It provides 2-channel RS232C port and requires external 10uF capacitors...
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Now you can burn microcontrollers in your home with less cost of making AT89S51 series microcontroller burning IC kit. AT89Sxx series IC`s have inbuilt ISP (In System Programming) module so we can burning microcontroller easily. Here is the simple board....
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With the advent of modern radio and radar systems came the need to provide stable harmonic oscillations at particular carrier frequencies to establish the required modulation and mixing conditions. While the carrier frequencies in the early days mostly....
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For all measurements with the oscilloscope, use the oscilloscope probe with the 10:1 attenuation to minimize measurement errors due to the capacitance of coaxial cable and the input resistance of the oscilloscope. Problem 1. The goal of this problem is to....
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A very interesting horn driver project presented by Microchip technology is presented in this circuit diagram. This horn driver project is based on PIC16F886 microcontroller, from Microchip. This microcontroller horn driver circuit diagram is very simple and....digital red light jump checking system with RF transmitter. By implementing this project we can trace the red light jumping car with number and the time..RF Wireless Data Transfer communication Circuit diagram.we implemented a wireless communication interface one point to another by means of RF technology...Line Follower Robot Project Using 8051 with circuit diagram is explained in this abstract. Download line follower or chaser robot full project report..An embedded C based RF controlled robot with metal detector and wireless image and voice transmission. Robotics project report for ece students with report..The power supply has been simplified. Power transformers and rectifiers have been omitted and some parts have been omitted from the MOSFET voltage regulator circuits: 1N5242 zener diodes between the source and gate and 10k resistors in series with the gate.....This Blog show the Different Electronics Circuit Design, Application, Fields and Resources which could help students, engineers, professionals, and common people whose interest is in electronics! For your comments, suggestions, or your looking for a circuit....To start in 24 seconds; 24s LOAD SW and Reset SW should be push simultaneously. If not, the count will start in 99. Pulse input can be connected to 555 astable multivibrator but must be calibrated for real time clock. The PAUSE SW must have a Switch....I`ve been getting my mosfets from Allied too. WAY cheaper than digikey. Let me see if I...On the rise of the second clock cycle, output "0" goes LOW and output "1" goes HIGH. This process continues across the tenoutputs and cycles to output "0" on the eleventh cycle...I needed a sine wave carrier for a magnetic transponder system I am working on. Various types of crystal based oscillator are available such as the Pierce, but these can be tricky to design and ensure they work correctly. Rich suggested using a square wave....We built a system that uses eight air-clamping cylinders (McMaster-Carr 62185K64) to push down on a piece of glass to seal it to a sidewall. A number of times, the glass has cracked. So, this project is an attempt to come up with an inexpensive way of....The following data and mapping are for the 2-D shift mapping algorithm that the controller will use to determine when and if to shift. The solid lines on the graph represent up-shift boundaries, and the dashed lines represent down-shift boundaries. This data....First you need a mechanical power source like a turbine(powered by water falling), wind turbine, gas turbine or steam turbine. A shaft from one of these devices is connected to a generator to make power. Dynamos and generators work using the wild complex....Imagine devices that can disable and destroy microorganisms-viruses, bacteria and fungi - by means of a pulsed, intense, magnetic field! They are not devices for the distant future. They are for today! Already several different pulsed magnetic field....Rf = 100 k preset - The slider is set about a quarter of the way round. This is used to control the gain. The gain should be as small as possible consistent with the oscillator starting up reliably. The zener diodes limit the oscillator output by decreasing....The Clapp oscillator is one of several types of electronic oscillator constructed from a transistor (or vacuum tube) and a positive feedback network, . Meissner (Armstrong) Oscillator The Meissner oscillator circuit is a harmonic (sinusoidal) oscillator....60-Hz, This high-Q notch filter is based on the "Twin-T" design. It produces a very deep notch in the response curve at about 59. 7 Hz. This is useful to remove 60-Hz hum and noise from audio recordings or live performances. Response is down over -60db at....555 timer circuits LM555 - Astable Oscillator Calculator + Capacitor Calculator, Basic Circuits For The LM555 Timer, Triggering And Timing Helpers For Monostable Timers, Controlling Circuits For LM555 Timers, Advanced Circuits For The LM555 Timer, LM556....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....DC Motor Control Using A Single Switch this simple circuit lets you run a DC motor in clockwise or anti-clockwise direction and stop it using a single switch, pdf file DC motor reversing circuit DC motor reversing circuit, A DC motor reversing circuit using....Amateur laser construction basic information on the construction of various types of lasers from scratch including: home-built laser safety, setting up a home laser lab, sources of supplies and chemicals, vacuum systems, glass working, structural materials,....Audio test oscillator audio test oscillator circuit, This generally results in a square wave if the frequency of oscillation is low enough relative to the amplifier`s bandwidth Crystal Controlled Oscillator schematic of a low frequency sine wave oscillator....Field Strength Meter Using A Biased Schottky Detector A temperature compensated Schottky diode is used in an amplified, untuned field strength indicator that is powered by two AA cells idicates the relative field strength of RF fields from a few kHz into the....Dark Activated Switch or Porch Light Switch This circuit will activate a relay when light falls to a preset level. Light level can be adjusted with VR1 and the relay contacts may be used to operate an external light or buzzer Dark Activated Switch This....Controller for Hybrid Power Plant block diagram of the HPP, comprised of 440 Wp photovoltaic modules, 1 kW wind turbine and 5 kW diesel engine as a back-up. HPP is a centralized PV and wind power generation plant, using battery to store the produced dc....9-line telephone sharer This circuit is able to handle nine independent telephones (using a single telephone line pair) located at nine different locations, pdf file Bidirectional telephone line simulator without using telephone lines, couple, test and....1200 Watt lamp dimmer circuit The circuit is a lamp dimmer circuit that is capable of controlling up to 1200 Watts. The circuit uses the Q4015LT combination Diac and Triac 230V dimmer This is a standard circuit which can be used to adjust the brightness of....Fresnel lens a thin disc of glass or plastic carrying a series of concentric stepped rings, each successive step from the central ring having the surface curvature of a much thicker lens Fresnel lens Fresnel Lenses for Rear Projection Systems, Film Fresnel....Electron tubes How Electron tubes work, Early tube history, The triode, The tetrode, Beam power tubes, The pentode, Combination tubes, Tube parameters, Ionization (gas-filled) tubes, Display tubes, Microwave tubes, Tubes versus Semiconductors Electron tubes....Designing and implementing this circuit was really very exciting for us. When designing the interface, we learn things of controlling a device from a computer. We use parallelport cable for this purpose and instantly controlled the rotation of the....After fail finishing the robot for the competition, I stopped updating my blog for a while. This is because I feel a bit disappointed for not be able to finish the robot in time. Today I am going to update the result of the entire work we hove done so far.....That hum noise is produced by electronic device with improper design, yes you`re right. And you might choose to solve the trouble maker, the source. You begin to check the grounding, the cabling, casing, and many more things you can do to eliminate the hum....Side tone coupling:In telephones, it is the hearing of one`s voice in the receiver when one speaks. Too muchside tonemake people speak lower and can cause feedback. Too littleside toneand people may think the phone is not working or may shout. Figure This is....