Circuits & Schematics: net - 4

31. High-impedance FET probe extends RF-spectrum analyzer's usable range
    Circuits Analogue Design Measurement Texas Instruments OPA656
    .. loads for a total load of 100 Ω, which results in a 6-dB gain loss for which IC1's gain of two compensates for a net gain of unity. The OPA656 also introduces lower noise and distortion than that of most commercially available, ...
    14-02-2016

32. Sound-Card Signal Generator Interface Adds Variable Offset Control
    Circuits Audio Computers and Peripherals
    .. and offset by the inverting summing amplifier U2A to form the signal-generator’s output. Figure 3. The associated VB. Net code provides an easy-to-use PC graphical interface for setting the function generator’s critical parameters.
    11-02-2015

33. One-chip 11×10 LED matrix
    Circuits Microcontrollers Usage Light PIC16F688
    .. video - it all works well. Code can be downloaded here - download . Charlieplexing little helper tool - http://www.modelci.net/charlieplex/ dmitry.gr
    29-05-2014
34. Gnat-power sawtooth oscillator works on low supply voltages
    Circuits Oscillators TS12011 TS12012
    .. to set and latch again (which happens due to the switched reference current causing the integrator to ramp negative). The net result: No glue logic is needed. The battery voltage ranges down to 0.9 V with a miserly V DD current of 3.2 uA. ...
    19-12-2013
35. A Generic Optimized 16-bit LCD Adaptor for the Arduino. Part 1 - Schematic
    Circuits Interfaces MCU Open-Source Platforms Microcontrollers Usage Arduino
    .. XMEM interface that is exposed in the block of pins starting at 23 (Figure 4). The letter ‘H’ in the net designators indicates that these are high level 5V signals. I should probably have used ‘T’ for TTL but ...
    05-10-2013
36. A Circuit for Mains Synchronization has Two Separate Outputs for Each Half-Period
    Circuits Measurement 2N3904 1N4148
    .. 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 high-voltage ...
    12-09-2013
37. 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
38. 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
39. 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
40. 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

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