Circuits & Schematics: www.aaroncake.net - 5

41. A Circuit for Mains Synchronization has Two Separate Outputs for Each Half-Period
    Circuits Measurement 2N3904 1N4148
    .. shifted for bet- ter visibility. REFERENCES “DIY: Isolated high-quality mains voltage zero-crossing detector,” www.dextrel.net/ diyzerocrosser.htm. Matteini, Luca, “Mains-driven zero-crossing detector uses only a few ...
    12-09-2013

42. Low-duty-cycle LED flasher keeps power draw at 4 mW
    Circuits Light Power
    .. Q 2 . This increase reduces the collector current of Q 2 and, therefore, the base current of Q 1 and closes the loop; the net result is a reduction of the collector current of Q 1 to maintain a constant value. Note that when the output of IC ...
    21-08-2013

43. Convert your smartphone into a pedometer and tracking device
    Circuits Wireless Measurement
    .. via GPRS (general packet radio service) or send it using SMS (short messaging service) to another mobile phone. A .NET application that runs on any PC with a mobile phone connected receives the SMS to track a user in real time on maps ...
    24-04-2013
44. Voice Shield for Arduino
    Circuits Audio MCU Open-Source Platforms Microcontrollers Usage Arduino Winbond ISD1790PY
    .. from a personal computer: in this case it must be MP3 or WAV files (Figure 6). Installation and Use note: Microsoft .NET Framework 4 is required to install the software. The use of the software is fairly intuitive: you need to first ...
    24-03-2013
45. G-Force Monitor
    Circuits Measurement Microcontrollers Usage
    .. ago, I got request to find some kind of solution to measure G-Forces in moving car. I found a lot of commercial products on net, but in my country it is little bit difficult to buy them, so I decided to make my own software and hardware. For ...
    17-01-2013
46. Zero-Cross Detectors Deliver Positive And Negative Triggering
    Circuits Power
    .. may have to use long control pulse trains or dc gate current. The triac used had an IG of less than 20 mA. R4 is a safety net that protects the transistors from excessive control current. R S and C S form a snubber network, which can be ...
    30-10-2012
47. Simple Circuit Interfaces 1-Wire Temperature Sensor To A Microcontroller
    Circuits Measurement Interfaces Microcontrollers Usage
    .. this interface circuit, along with comments. The PSoC integrated development environment is available without charge from www.cypress.com. For use at longer distances, the circuit can be extended over several feet with the modifications ...
    28-10-2012
48. Front End Turns PC Sound Card into High-Speed Sampling Oscilloscope. Part 2 - Active Reconstruction Filters, Powering the Circuits, Input Attenuators
    Circuits Measurement
    .. into a complete set of measurement instruments. No new hardware is necessary as it uses the PC’s sound card. http://www.sillanumsoft.org/. Syscomp Electronic Design, Ltd. http://www.syscompdesign.com/Accessories.html. HobbyLab ...
    16-10-2012
49. Use a boost regulator beyond its rated voltage
    Circuits Power
    .. higher-voltage operation. You can design and simulate this circuit using the ADIsimPower design tool, which is available at www.analog.com/adisimpower. The tool lets you design boost, SEPIC, and SEPIC-Cuk converters using this technique and ...
    27-06-2012
50. 2.4GHz WiFi & ISM Band Scanner. Part 3 - Assembly, Using the Scanner
    Circuits Wireless Measurement Microcontrollers Usage
    .. best spots with the minimum of interference. Spikes all over the spectrum is a good indicator of Bluetooth activity. geoffg.net
    06-06-2012

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