Function Generator 1.2
Dual channel function / waveform / signalgenerator for the speaker / headphone audio output.No Ads, No Permissions, No In App Purchasing, No Limited Features.Full Version.Output is 16 bit for each left and right channels and at 44.1kHz.Output will depend on your device hardware. Some device hardwaremay may filter out the DC bias and low frequency signals. At highfrequencies, the waveforms will be distorted due to limited numberof samples for each waveform (for example at 4.41kHz, a sinewaveform will be approximated by only 10 points). Therefore this isfor fun/educational use, for critical applications use a realcalibrated function generator.Left and Right audio channels can be assigned to either channel 1or channel 2.Sine, Square & Triangular waveforms.Frequency range from 1 mHz up to 22 kHz.Amplitude as percentage 0-100%.Set duty for square waveforms or skew triangular waveforms to getsaw waveforms.Offset the phase of waveforms.Sweep frequency or amplitude (Single, Repeat & Bouncemodes).Amplitude Modulation (AM).Frequency Modulation (FM).Burst mode for a specific number of waveforms (1-10000).White noise & pink noise Generator. Pink (1/f) noise falls ofat ~3dB per octave between 43 Hz and 44 kHz.Memory slots to save & recall channel configuration.Select values with spring slider or number pad.More detailed explanation available on website
Guitar Tuner 1.41
Straightforward guitar tuner. Single screenapp that starts in auto tune mode. Simply run the app, hit a stringand start tuning your guitar. Tune into the orange region for agood results or green for perfection.This app uses your microphone to detect the string being played andindicate if you should tune up or down.Pitch pipe function also included.The standard EADGBE guitar (not implemented for very small screendevices) indicates current note being played or allows fast noteselection in manual mode.Tuning range from 30 Hz (B0) to 4186Hz (C8), so can also be used totune other stringed instruments.
USB Host Test 1.1
Tests your device USB Host capability bylisting the USB devices attached.Simply run the app, plug in your USB device(s) and clickfind.Copy results to clipboard ready for pasting into othersoftware.Not all devices have USB Host capability. For USB devices to bedetected we need:Android 3.1 or newer (USB Host API support)Device that has USB hardware.Compatible Kernel that links the hardware to the API. (Rooting orchanging kernel can often solve USB connectivity issues, but onlyattempt if you know what you're doing).USB OTG connection.Sufficient power on the USB bus.If USB devices are detected, details reported include:Device Serial NumberVendor IDProduct IDManufacturer String DescriptorProduct String DescriptorClass, Subclass and ProtocolUSB VersionMax PowerNumber of ConfigurationsNumber of InterfacesInterface and Endpoint InfoNote the amount of info shown will depend on the USB device and theamount of access allowed.
Pulse Echo Sonar Meter 1.01
Uses the audio autput to generate sound pulsesand then detects the echo on the microphone. The echo signal can bevisulised in a map, Fourier transformed or just as the time-serieswaveform. Great for investigating/demonstrating acousticsprinciples. Free & No Ads.RECORD_AUDIO Permission to use microphone to detect the echo.WRITE_EXTERNAL_STORAGE Permission is so that data can besaved.Features/Specifications:• Sampling frequency 44.1 kHz.• Sampling duration 0.001 s to 5 s.• Single / Continuous modes.• Save Data in CSV files.• Pulse Generation:• Single/Train/Chirp.• Square/Sine waveforms.• Tukey/Hanning Envelopes.• Pulse frequency 20 Hz to 22.05 kHz.• Pulse duration up to 1 s.• MAP – Visualise the echo. Colour or Black and White. Pixel valuefrom RMS or absolute value. New line for each echo trace. Movedevice whilst pulse-echoing to generate a map.• Fast Fourier Transform (FFT) of 8192 data points to determinefrequency content between echo detect lines.• Peak frequency detection• FFT AveragingFor Indication Only. Use Ear Protection if required. Due to thelimits of the typical microphone dB range on most devices, distantecho signal are likely to be too weak to detect clearly unlessextra amplification or a strong echo is present.For fun/educational/research use. This is not ultrasound and NOTsuitable for any medical imaging. This app can create annoying loudsounds, so use ear protection if required.
Metronome with no ads & nopermissions.♩ Beats per Minute (BPM) from 10 up to 310 in 0.1 BPMintervals.♩ Moving pendulum with motion blur effects.♩ Accelerando slider for gradual speeding up/slowing down. (0.1 to10 BPM/bar)♩ Beats highlighted on musical staff as they are played. Accent ormute any of the beats by tapping above/below note.♩ Select up to 12 Beats per bar. Set beat value to half note,quarter, eighth or sixteenth.♩ Three different sound effects to choose from.♩ Select from 0 to 9 sub beat divisions.
Bluetooth Electronics 1.1
Control your electronic project with anAndroid device. This app communicates using Bluetooth to an HC-06or HC-05 Bluetooth module in your project. This app comes with alibrary containing 10 Bluetooth examples for Arduino. It can alsobe used with Raspberry Pi or any other rapid prototyping system inwhich you have included a suitable Bluetooth module to yourproject.Ideal for learning electronics in a fun way.Ideal for rapid prototyping a new idea.Ideal for exhibiting your project.Some electronics skills required. Requires an Android device withBluetooth capability enabled. Does NOT work with Bluetooth LowEnergy.Large selection of controls available including buttons, switches,sliders, pads, lights, gauges, terminals, accelerometers andgraphs. Drag and drop them onto the panel grid. Then edit theirproperties.20 customisable panels available. Import/Export panels.Discover, Pair and connect to Bluetooth devices. Then click Run touse the panel.Library of 10 Arduino Examples to get you started:LED Brightness - PWM with a Slider controlRC Car demo – Basic Button controlsPersistence of Vision – Text controlRepeater Demo – Send and Receive TerminalsUltrasonic Distance Sensor - Light IndicatorMEGA Monitor – GraphsUNO Monitor – More graphsTemperature and Humidity – Temperature GaugeConfigure HC-06 Demo – In-case you want to change Baud rateMotor Control Demo – Accelerometer and pad controlsFinally, You undertake any electronic project at your own risk.Please be careful. Consider what is going to happen to your projectif the Bluetooth connection is lost, or the Android devicecrashes.
Uses the Magnetic Field Sensor to convert yourdevice into a Compass. Does not need to be level. Magnetic Northand True North Needles. Free & No Ads.Location is required to determine the magnetic declination - thedifference between magnetic north and true north (Hence theACCESS_FINE_LOCATION Permission). If GPS/Network location is notavailable or turned off, then the location can still be enteredmanually.Normally a compass needs to be level to get the correct reading,but this app uses the accelerometer reading to convert the magneticfield reading back to the horizontal plane. If you would prefer itto act like a real compass (which requires being level for acorrect reading), in Settings > Mag North, select the magneticnorth to point to the maximum field in the plane of thedevice.Also:• Bull's eye Bubble in Compass to show how level it is.• Roll and Pitch Gauges.• Calibrate Bubble Level Option.• Heading in Azimuth or Quadrant Notation.• Magnetic Field Strength and Inclination.• Rotatable dial with orienting lines.• GPS/Network Location – Latitude, Longitude and Elevation (GPS canconsume a lot of battery, therefore it is only measured continuallywhen the location display is shown. Otherwise just one reading istaken from which the magnetic declination is determined).Your device must have a Magnetic Field Sensor for this app to work.Magnetic field direction can be affected by nearby ferromagneticmaterial - Therefore move into a clear area and remove any metalliccasing that might interfere with the sensor. Some sensors canbecome magnetized or gain an offset resulting in false readings –rotating the device around each of the three axis can sometimeshelp. Results depend on quality of magnetic sensor, so use forindication only.
Accelerometer Meter 1.32
View or log output from your accelerometersensor. The app has six screens to choose from:MeterThis show the output from the accelerometer and minimum and maximumvales recorded.GraphPlots the accelerometer output over time. Option to savedata.SpectrumShows the frequency spectrum of the recent accelerometer data. Useto find resonant frequency's.LightConverts the accelerometer sensor output into a colour. Wave thedevice around and the colour will change.MusicThis is a musical instrument based on the accelerometer sensor.Orientation selects the note and pitch the volume. It is based on a5 equal temperament notes per octave scale so that the music willstill sound reasonable even if played badly.InfoThis screen provides info on your sensor, such as vendor, version,resolution and range. It also shows info for other sensors on yourdevice.Free & No Ads. No time limits, no restricted features etc, thisis the full version.Write external storage permission so that you can save the data ingraph or spectrum modes.
Keuwl Guitar Tuner 1.11
Keuwl Guitar Tuner uses the microphone to autodetect the pitch of the note being played. The 3 dials will rotateto show the note being played. The middle dial shows the pitch ornote name. The inner dial shows the octave. The outer dial willshow if the note is flat or sharp - The orange region is within 10cents for good tuning, the green is within 5 cents for moreaccurate tuning.Keuwl Guitar Tuner is free. No ads. No trial version. No timelimits. No restricted features. The only permission is formicrophone access. This is the full version!Whilst optimised as a guitar tuner, this app can be used for tuningmany other musical instruments. Frequency detection from B0 (30 Hz)up to C8 (4186 Hz).In addition to 12 Tone Equal Temperament(12-TET), choose from justintonation, Pythagorean, 5-limit, 7-limit, quarter comma meantoneand N-Tone equal temperament tuning. For N-Tone ET, N can rangefrom 5 to 52.Shift feature for those that don’t want A to be 440 Hz or if youneed to tune to accompany your out of tune friends. Get them toplay a note, hit the shift key, and rotate the dial to what theythought they played. Hit the shift key again and then tune asnormal. Remember to hit reset to get back to original settings atany time.Pitch Pipe also included.
GPS Waypoint Finder 1.00
Uses the GPS sensor, Magnetic Field Sensor andAccelerometer to determine the distance and direction to a GPSwaypoint. Does not need to be held level. Free & No Ads.Normally a compass needs to be level to get the correct reading,but this app uses the accelerometer reading to convert the magneticfield reading back to the horizontal plane.In addition to the direction and distance to the waypoint, acompass ring shows the current heading. North points to True North(i.e. The direction is corrected for the magnetic declination - thedifference between magnetic north and true north).The GPS reading and the time since that reading is shown at thebottom of the screen.Use for geocaching, finding your car, hotel, or otherlocations.• Store up to 500 waypoints.• Imperial or Metric units.• Import and Export waypoints as GPX files.Arrow colour changes to green at less than 30m and blue at lessthan 10m to make it easier for littler ones to identify thatthey've reached the waypoint.Whilst walking, look where your going, not at the app or you mighttrip! The app tells you the direction of your destination, not howto get there.Only as good as the sensors in your device. Use for IndicationOnly.
Car Challenge 1.00
Guide your car to the end of each trackwithoutcrashing. Good timing and memory are required to completeeachlevel.• 25 tracks• 5 Different Cars• Designed to be played in the hard difficulty setting(nocrashing allowed), however easy and medium difficulty (carscantake some damage) are also available.No Ads & No Permissions.
A simple, but very handy on screen ruler. NoPermissions, Free & No Ads.Automatically sizes to most screens. However, check scaling with anormal ruler on first use. If it is not correct, touch CAL andstretch the ruler to the correct size.• Centimeters and inches.• Measure length between two markers.• Copy to clipboard.
Stopwatch with great graphics, no ads & nopermissions.Operate up to 8 stopwatches simultaneously (each one is coloureddifferently and selected at top of screen).Log up to 100 Lap or Split times for each stopwatch.Pressing Split before starting stopwatch will change to Lap mode& visa versa.Stopwatch settings and times are stored for the next time the appis run, so it will appear that the stopwatch has been runningcontinuously in-between.
Geo Protractor 1.01
Measure angles between two points on the geosphere with the camera and augmented reality. Free & NoAds.Device orientation is obtained with the accelerometer andgyroscope, or with the accelerometer and magnetic field sensor.Each method has advantages and disadvantages and can be selectedwith the gyro or magnet buttons (only if your device has thenecessary sensors detected).A sphere with azimuth and angle of elevation lines is shownoverlaying the camera view.Two positions can be set putting markers onto the view. The anglerequired to rotate from one to the other is shown, as is thedifference in azimuth and angle of elevation between the twopoints.For Indication Only. Note that in gyroscope mode, the azimuth willdrift slowly. In magnetic mode, the Earths magnetic field can bedistorted by nearby metallic objects and give incorrect azimuthreadings. For Indication Only.
LED Banner Scroller 1.01
Display scrolling messages. Sendencouragement, display notices, get peoples attention, and morewith this led banner scroller. Includes an experimental multiscreen option for displaying the message over multiplescreens.Features:• Up to 6 lines of text.• Portrait or Landscape banner.• Mirror option for when banner is to be viewed through amirror.• Left, right, up, down or static scroll options.• Vary scroll speed.• Choose text & background colors.• Alter LED grid size.• Auto or manual size text.• Left, center or right text justification options.• 20 Memory slots to store messages.• Create messages in any language.• Multi Screen (uses RECORD_AUDIO permission & might not workon all devices). Uses audio communication to transfer scroll infoto nearby devices to create a longer scroll comprising multiplescreens. Set one device as the Master, and the others as Minions.Hold the speaker near the microphone of the receiving device(s) forbest results.Free & No Ads. Enjoy.
Flashlight (aka Torch), Free, No Ads. Just agreat app with some cool features....Torch Mode – Turn the camera LED on and off. If no Camera LED isdetected, the torch option is not available. (uses FLASHLIGHT &CAMERA Permissions).Screen Mode - Use the display as a light - Swipe up/down to changecolor, left/right for brightness or diagonally forcolor/grey.Music Mode – Lights and graphics that move in response to sounddetected on the microphone. (uses RECORD_AUDIO permission).Accelerometer Mode – Color will change with orientation of device.Wave about at a music festival for a cool effect.Hazard Mode – In trouble, or just want some cool flashing lights.Change speed, color and blink pattern.Widget - (Navigate to widgets, hold on icon for 4s & place onhome screen). Widget turns LED on and Off (or loads the app ifthere is no LED).Please Note:1) Flashing lights can cause epileptic fits in some people, so useflashing features with caution.2) These lights do not have reflective properties - car/bike lightsare a combination of reflector and light – therefore use a properlight designed for its application when possible.3) Don't shine the bright torch in eyes - it hurts.Enjoy!
Basic calculator with 9 digits (+2 more forthe x10 exponent).Looks and acts much like a real hand held calculator.Ads only shown on exiting app.• Add things.• Subtract things.• ….• Square Root, Reciprocal and Percent Buttons.• Memory Buttons.• Enter numbers as large as 9.99999999E+99 or as small as1.00000000E-99.• Settings to turn vibrate & sound off and on.• Short user guide in app found by pressing the i button at the topright.
Accelerometer Counter 1.10
Count accelerometer events with this app byshaking or rotating your device. The accelerometer sensor iscontinually monitored and when the detection level is crossed, thecounter is increased by one.• Detect the acceleration in either of the X,Y Z axis, themagnitude of the acceleration, or the angles about the device's Zaxis or XY plane.• Detect on rising or falling past the detection level.• AC or DC coupling option.• Adjust measurement speed to one of 12 frequencies between 0.5 Hzand 2 kHz.• Reduce double counts with optional no-count wait afterdetection.• Graph to show accelerometer input in Cartesian and/or sphericalcoordinates.• Counts indicated on graph and with optional 'click' sound.Accelerometer sensors will vary in sampling speed, resolution andaccuracy from one device to the next. For indication only.
Base Converter 1.00
Convert integers from one base toanother.Binary, Octal, Decimal, Hexadecimal, or any base between 2 and62.Numbers up to 256 characters in length. (Not limited by 32 or 64bit integers, can handle 256 bit integers in binary, or larger inthe other bases).Either of the two displays can be selected and edited, with theconversion for the other display done automatically as one ischanged.
Magnetic Field Counter 1.02
The magnetic field sensor in your device iscontinually monitored and when the detection level is crossed, thecounter is increased by one.• Detect from the magnetic field in either of the X, Y, Zdirections, or from the magnitude of the magnetic field, |B|.• Detect on rising or falling past the detection level.• AC or DC coupling option.• Adjust measurement speed to one of 12 frequencies between 0.5 Hzand 2 kHz.• Reduce double counts with optional no-count wait afterdetection.• Graph to show magnetic field values.• Counts indicated on graph and with optional 'click' sound.Magnetic field sensors will vary in sampling speed, resolution andaccuracy from one device to the next. For indication only.Don't put a strong magnet too close to your device – you riskdamaging the sensor/device. However, waving your device around inall three axis should restore the magnetic field sensor to goodworking order.
AC Magnetic Field Meter 1.01
Turn your device into an AC magnetic fieldmeter by using its magnetic field sensor.Measure the RMS values from AC magnetic fields.Fast Fourier Transform (FFT) to obtain the magnetic field frequencyspectrum.• Gauge to show the RMS B-field in the X,Y or Z directions, or fromthe magnitude. Or alternatively show the DC magnetic field.• RMS graph to show the gauge readings over time.• Lower display shows time series data or a FFT from it.• Peak indicators for the frequency spectrum.• Save graph data to file.• Units of Gauss or microTesla.Magnetic field sensors will vary in sampling speed, resolution andaccuracy from one device to the next. For indication only.Don't put a strong magnet too close to your device – you riskdamaging the sensor/device. However, waving your device around inall three axis should restore the magnetic field sensor to goodworking order.This app is designed for indication and educational purposes only.Always use a suitable calibrated more accurate device appropriatefor the situation when required.
RMS Displacement Meter 1.00
Measures displacement by double integratingtheacceleration from your device's linear accelerationsensor.Any drift or error in the accelerometer and/or other sensorreadingsis quickly magnified in the double integral, such thateven astationary device will quickly show displacement readingsgoingwild. Therefore this App is for measuring alternatingdisplacements.i.e we apply a drift reduction algorithm to removeany DC componentand then measure the AC displacement by means of aRoot Mean Square(RMS) value, or perform a Fast Fourier Transform(FFT) to obtain thefrequency spectrum.• Gauge to show the RMS displacement in the X,Y or Z directions,orits magnitude.• RMS graph to show the gauge readings over time.• Lower display shows time series data or a FFT from it.• Peak indicators for the frequency spectrum.• Save graph data to file.• Units of cm, mm, m, inches or feet.An example: Move the device in a circle along two of its axis.Youshould see two sinusoidal traces 90 degrees out of phase inthetime series graph, determine the rotation frequency inthefrequency spectrum and obtain an estimate of the diameter ofthecircle from the gauge or its corresponding graph (when set topeakto peak mode in settings).Linear acceleration sensors will vary in sampling speed,resolutionand accuracy from one device to the next. Forindicationonly.
Camera RGB Color Picker 1.00
Pick, tweak and store RGB colors grabbed fromthe camera preview.• Hexadecimal RGB color code.• Store up to 250 colors.• Suggests nearest of 138 html named colors.• Copy color values to clipboard.• Pause image and move target cursor.• Setting for using volume buttons to grab and store colors.• Turn camera flashlight on or off. Zoom camera in/out.Note that the camera and screen of your device might not measure orrepresent color accurately, therefore for Indication Only.
Tabata Timer 1.0
Tabata is a form of high intensityintervaltraining (HIIT). By default one Tabata workout comprises a4 minuteworkout, divided into 8 rounds. Each round comprises a 20secondwork period of physical exercise followed by a 10secondrest.Adjustable Tabata times (0-9999 seconds for each stage).Adjust number of rounds (0 to 500). Round progress is indicatedbythe smaller circles around the timer ring.• Prepare and cool down stages.• Rename Tabata and any of its first 30 rounds.• Modify timings and names for 10 different Tabatas.• Choose form various sound and vibrate options foreachstage.• Pre-beep or vibrate countdown to next stage.