Circuits & Schematics: www.aaroncake.net - 6

51. 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

52. Simple PC thermometer
    Circuits Measurement Computers and Peripherals
    .. Send Ready DSR = Pin 6 Transmit Data TXD = Pin 3 (If you have 25-pin connector for modem, find pinout for your connector on net) Build it, hook it up, calibrate./p Through the day temperature logging - You can throw it through the window and ...
    17-03-2008

53. Autozeroed Amplifier with Halved Noise Needs Few Components
    Circuits Analogue Design Analog Devices AD8553
    .. ICs is harmless here because the output resistances of the voltage-to-current converters are theoretically infinite. The net result of paralleling N input stages is that they output current of N(V INP V INN )/(2R 1 ), or N times that of a ...
    27-11-2007
54. Gain-Of-Three Amplifier Requires No External Resistors
    Circuits Analogue Design Analog Devices ADA4862-3
    .. requires a gain of three, you can use the circuit in Figure 1. Amplifier A3 serves as an impedance converter with a net voltage gain of one and a low-impedance driver for A1's gain-setting network. Amplifier A2 provides a gain of two ...
    29-11-2007
55. Microcontroller Simplifies Battery-State-of-Charge Measurement
    Circuits Wind Energy Power Solar
    .. QACC, where QREM is the remaining battery charge, QPREV is its previously calculated charge, a plus sign indicates a net charge, and a minus sign indicates a net discharge. The circuit comprises an eight-pin version Freescale's low-cost ...
    21-01-2008
56. Composite instrumentation amplifier challenges single-chip device for bandwidth, offset, and noise
    Circuits Analogue Design Analog Devices AD8250 AD8253
    .. three ICs connect. The AD8250 has a typical bandwidth of 3.8 MHz and a guaranteed bandwidth of 3 MHz at a gain of 10. The net result is that the bandwidth of the amplifier is 1.9 MHz at a gain of 1000, which is more than six times that of ...
    27-10-2020
57. Nokia 3310 Lcd Thermometer Using DS18B20
    Circuits Measurement Microcontrollers Usage
    .. connectors so this one is much easier to use). This is a Phillips PCD8544 display , it can be easily found on the net if you want more information about it. PCB The second step is making the board which is small and isn't that ...
    04-02-2008
58. Wind Generator from Old Scanner
    Circuits Wind Energy Supply
    Tigrezno I'll show you how to recycle an old scanner into an amazing wind generator. You need it, clean energy! What you need: Old scanner Rectifier diodes (I used 8 1N4007 ) 1000 uF Capacity LM7805 (voltage regulator for 5 volts) PVC pipe (for ...
    18-03-2008
59. Build Your Own PC Interface
    Circuits Networks Interfaces
    .. the unit supporting so many modes like PSK31, MFSK16, MT16, Hellschriber, SSTV, RTTY,AMTOR, PACTOR, PACKET, CW and over the net Echolink and Echostation. Its time to conquer new digital domains for The world is not enough!
    02-12-2008
60. Automatic Room Lights
    Circuits Domestic Light
    .. inverter gates N1 through N4) are ANDed by AND gates (A1 through A4) are then wire ORed (using diodes D5 through D8). The net effect is that when persons are entering, the output of at least one of the AND gates is high, causing transistor ...
    01-07-2009

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