Circuits & Schematics: www.aaroncake.net - 4

31. Raspberry Pi GPIO Explained. Part 2
    Circuits MCU Open-Source Platforms Raspberry Pi
    .. by Gordon Henderson. First off, install the wiringpi library: mkdir development cd development git clone git://git.drogon.net/wiringPi cd wiringPi ./build Next, save the following code into a file called voltmeter.c . The code can be ...
    13-09-2017

32. Square-root function improves thermostat
    Circuits Analogue Design Measurement Texas Instruments LM399
    .. linearization with constant loop gain. E is the product of A and C and is the achieved loop-gain linearization. The net result is a linear relationship between the control circuit and heater outputs and a consequent optimization of the ...
    26-04-2017

33. How to make your own electronic clock in retro style
    Circuits Microcontrollers Usage ON Semiconductor MC34063A
    Čestmír Hýbl elbastl.sweb.cz Introduction Some time ago I was poking in my box of old components. I was searching something else, but I stopped when a few of nixies came up into my hand. Once upon a time (a long, long time ago) I ...
    26-04-2017
34. Battery-powered amplifier has optical isolation
    Circuits Analogue Design Measurement Maxim MAX406
    .. less than 1% transfer-function nonlinearity. With suitable adjustment of the SPAN potentiometer, a 50-mV input produces a net Q 2 , Q 3 , Q 4 composite current of 500 µA and 5 V output voltage, ideal for direct input to a typical A/D ...
    03-11-2016
35. Configurable logic gates' Schmitt inputs make versatile monostables
    Circuits Digital Fairchild NC7SZ57 NC7SZ58
    .. requirement for adding pulse-generation functions to a crowded PC board, I searched Fairchild Semiconductor's Web site (www.fairchildsemi.com) for small-footprint Schmitt-input logic gates and found only old faithfuls familiar ...
    24-08-2016
36. 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
37. 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
38. One-chip 11×10 LED matrix
    Circuits Microcontrollers Usage Light PIC16F688
    .. see in the 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
39. 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
40. 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

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