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Weather Display with ST Nucleo [160157]

Weather Display with ST Nucleo [160157]

par Lucky
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Graphic LCD shows weather forecast
249 Vues | 0 Commentaires
RF Power Meter with 1MHz-10GHz bandwidth and 55dB dynamic range

RF Power Meter with 1MHz-10GHz bandwidth and 55dB dynamic range

par BreedJ
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What is it: An RF Power Meter is a device which you can use to measure the power a transmitter outputs. Why did I built it? Read all about it!
24501 Vues | 58 Commentaires
A traffic-light system for the modell-railroad

A traffic-light system for the modell-railroad

par robvh
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By using so called ladder diagrams one can build a PLC-program like a schematic diagram using relais like in the early days of automation.
12045 Vues | 1 Commentaires
Activator for lead accumulators [160064]
Produit disponible

Activator for lead accumulators [160064]

par Lucky
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Short high current pulses can prevent or even solve sulphating of the lead accumulators and can be used to measure its state of charge
2945 Vues | 2 Commentaires
Flexible IoT sensor interface, GoNotify

Flexible IoT sensor interface, GoNotify

par Blue bird
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This is a universal IoT sensor interface. It will challenge you to create power efficient sensor-apps over WiFi.
7181 Vues | 0 Commentaires
Card Sound

Card Sound

par fasoft
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Sound file player. Play sounds stored on an SD card with 2x 7W output power.
6479 Vues | 6 Commentaires
Laser Plot Clock

Laser Plot Clock

par Axiris
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The laser plot clock writes the time on a piece of glow in the dark sticker material using a violet laser module.
1184 Vues | 2 Commentaires
Peltier Lamp
Produit disponible

Peltier Lamp

par Axiris
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Efficiency booster for candles. The peltier lamp converts heat energy released by a tea light into electric energy in order to drive a USB LED light.
9147 Vues | 6 Commentaires
Head-up Speed Display for Car

Head-up Speed Display for Car

par jojohn
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Simple circuit that projects the car's speed on the wind screen using 7-segment LED displays and an Arduino Uno.
8688 Vues | 9 Commentaires
30V-3A-SMPS [150161]
Produit disponible

30V-3A-SMPS [150161]

par TonGiesberts
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In 2010 we published a power supply called UniLab (project 090786). It was able to deliver 30 V and 3 A. This design can be considered its successor.  Maximum voltage is also 30V and the maximum output current is limited to a little over 3 A (5 A is possible, but with reservations). We used a different step down voltage regulator, the LM2677-ADJ.
16308 Vues | 11 Commentaires
Versatile Switch Mode Power Supply PWM Controller [ 150100 ]

Versatile Switch Mode Power Supply PWM Controller [ 150100 ]

par Mickael.Delayen
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Although SMPS (switch mode power supplies) can take various structures (Buck, Boost, Flyback, Forward, etc.), they are always based o
7098 Vues | 5 Commentaires
Tabula: Trackable Tangibles on Multi-Touch Displays [160123]

Tabula: Trackable Tangibles on Multi-Touch Displays [160123]

par Lucky
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How to detect objects placed on a touch screen...
2472 Vues | 0 Commentaires
Maximum Power Point Tracking for Solar Photovoltaic Panel [150411]

Maximum Power Point Tracking for Solar Photovoltaic Panel [150411]

par bera
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MPPT – Maximum Power Point Tracker
6000 Vues | 4 Commentaires
Spot welding [130286-I]

Spot welding [130286-I]

par Lucky
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A few years ago Elektor published a workshop on spot welding for smaller objects (welding battery packs) using capacitive discharge. This was not a finished project, rather a starting point for experiments and development.
11341 Vues | 16 Commentaires
Platino Battery Tester [130543]
Produit disponible

Platino Battery Tester [130543]

par Sunil_M
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IntroductionA simple Platino-based battery Tester is designed for not too demanding (hobbyist) applications. A simple way of establishing the capacity of a storage battery is to recharge it and then discharge it again in a controlled manner.
6244 Vues | 2 Commentaires
SKIP!! (single button Media Player control via USB)

SKIP!! (single button Media Player control via USB)

par Lucky
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At home we ripped all our audio CDs to a NAS and most of the time we use Windows Media Player or VLC player (we still don’t agree which one’s the best) in random order play to have some background music in our workshop.
3320 Vues | 2 Commentaires

Automatic license plate recognition (ALPR)

par Sunil_M
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Automatic license plate recognition (ALPR) is a mass surveillance method that uses optical character recognition on images to read and recognize number. They can use existing closed circuit are road-rule enforcement cameras, or ones specifically designed for the task.
33157 Vues | 4 Commentaires

Guitar BoB [150382]

par ClemensValens
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A guitar input module for easy breadboarding. This project spun of from the CoCo-ri-Co guitar tuner.
2982 Vues | 0 Commentaires
CoCo-ri-Co! Guitar Tuner [150006]

CoCo-ri-Co! Guitar Tuner [150006]

par ClemensValens
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Because the CoCo-ri-Co Cool Controller Concept is a hexagonal board with a powerfull ARM Cortex M0 processor and a ring of LEDs, we thought that a 6-string guitar tuner would be a nice application for it. By adding an analog front-end and some clever software the LEDs can indicate how well the guitar is tuned.
3348 Vues | 0 Commentaires

audio traffic light [140082]

par Niek.Laskarzewski
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The audio traffic light is a straightforward circuit which tells you whether an audio signal is dangerous for your ears or not.
2420 Vues | 0 Commentaires
Interrogation lamp (or possibly a bicycle light) [140002-I]

Interrogation lamp (or possibly a bicycle light) [140002-I]

par Ian.Field
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On discovering that my previous design based on a blocking oscillator and diac strobe pulser was a bit heavy on the battery, it seemed about time to attack the problem from a different angle with an oscillator that is easier to tweak for the most favourable characteristics.
7806 Vues | 2 Commentaires
Commentaires récents
Matthias Pleschinger
Matthias Pleschinger il y a 6 heures
Hi, your nwatch is great. I would like to build it on my own based on your article. But I have a problem to find the right touch panel and the S1-S3 buttons. Can you please give me further information or links where you have bought these parts? Thank you very much! Matthias
nWatch - build and program your own smartwatch [160326]
BreedJ
BreedJ il y a 1 jour
Hi Mans, Unfortunatly I do not own equipment with frequencies higher than 1GHz. I posted new firmware which contains the possibility to do your own callibration when you have the equipment for it. Maybe someone else reading this and owning the equipment can help us out. joost
RF Power Meter with 1MHz-10GHz bandwidth and 55dB dynamic range
TonGiesberts
TonGiesberts il y a 1 jour
This part of the circuit is in principle not any different from other oscillators. Part of the output signal is coupled back to the input of the driver. If the gain is sufficient it will cause oscillation at whatever frequency the circuit is tuned to. The current through R28 is the same as is flowing through the air (the discharges) and returns through parasitic capacitances to the mains and the AC adapter and thus ground of the circuit. At 4 MHz these capacitances can be small. Since the current is very low voltage drops, compared to 30 kV, are negligible.    
Spiral MicroTesla, USB powered [160498]
TonGiesberts
TonGiesberts il y a 1 jour
It’s possible to change the installation of  Volumio 1.55 to have the main menu item ‘Turn off visible when the rotatiion of the display is normal. It’s much like changing the zoom level of Midori in the RuneAudio project update. All it takes is to change the command line that opens Midori in Autostart:   In ~/.config/lxsession/LXDE-pi/autostart change the line  midori -e Fullscreen -a http://localhost   to  midori -e Fullscreen & ZoomOut & ZoomOut -a http://localhost   It will make Midori zoom out twice. Once would be enough but the button Turn off isn’t completely visible then and maybe an option if some letters are getting to small. The photograph shows the result with zoom out twice.  
Audio DAC for RPi - Networked Audio Player using Volumio [160198]
Mansueto Grech
Mansueto Grech il y a 2 jours
Hi Joost, Unit assembled an working Fine. I have a question If I may. Is it possible to substitute the pre defined  power calibration  with new Frequencies. As I would like it to be calibrated on the Ham Bands and mainly 144, 432, 1296 2304 5700Mhz. and possibly 10Ghz. Thank you in advance  regards Mans.
RF Power Meter with 1MHz-10GHz bandwidth and 55dB dynamic range