Circuits & Schematics: 10 - 4

31. Low-noise ac amplifier has digital control of gain and bandwidth
    Circuits Analogue Design Audio Analog Devices LT1884 LTC6910-1
    .. input LTC6910-1, IC 1 , provides digital gain control from 1 to 100 using a 3-bit digital input to select gains of 1, 2, 5, 10, 20, 50, and 100. The circuit's lower 3-dB frequency is fixed and set to 1 Hz. A second LTC6910-1, IC 3 , is ...
    05-09-2020

32. How I home-built an electricity producing Wind turbine. Part 3
    Circuits Wind Energy
    .. head unit I attached a 1 inch iron floor flange centered 7 1/2 inches back from the generator end of the 2X4, and screwed a 10 inch long iron pipe nipple into it. The nipple would slip into the top of the piece of conduit I'd use as a tower and ...
    10-11-2009

33. Build a charge pump with ultralow quiescent current
    Circuits Supply Maxim MAX981 MAX4685
    .. larger than the actual load current. Though several inductor-based converters offer maximum quiescent current of less than 10 µA, designers usually prefer or require a regulated charge pump for cost-sensitive designs that must be ...
    22-11-2020
34. Key-Glove. The Cheapest Wearable Keyboard on Earth
    Circuits Computers and Peripherals
    .. wrap wire from Radio Shack ($3) (Douglas J.A.R. Sasse suggested: doll house wire) 1 spool of black heavy duty thread ($ 1) 10+ plastic zip ties ($ 1) Directions fasten 13 male snaps to fingers of leather glove (4 each per first three fingers ...
    04-11-2008
35. Solar day lamp designs use passive and active current-limiting circuits
    Circuits Supply Light Solar STMicroelectronics TIP31C
    .. method of current limiting is to place a resistance in series with an array of LEDs. Typical specifications of a 12 V 10 W solar photovoltaic (PV) panel are as follows: Voltage at maximum power V MP = 17.4 V Current at maximum power I MP ...
    23-06-2020
36. Embedded MP3 module. Part 2 - Configuration of the module, Software
    Circuits Audio Microcontrollers Usage
    .. memory. Timeout : defines the duration in milliseconds of time for entering the track number, the value can vary from 1 to 10,000 ms (default is 3000, ie 3 s). Parameters for Pin-to-Pin and Mixed mode: Time Wait Play and Time Wait Vol : are ...
    31-10-2011
37. Solenoid-protection circuit limits duty cycle
    Circuits Supply Analog Devices AD822
    .. duty-cycle limiter. Figure 2 highlights the circuit’s timing components. Capacitor C 2 , a tantalum electrolytic with 10% tolerance, diode D 1 , and resistors R 2 and R 5 constitute a double-RC (resistor-capacitor) circuit. During ...
    25-06-2020
38. Novel circuit isolates temperature sensor from its host
    Circuits Measurement Microcontrollers Usage Maxim MAX845 MAX6576
    .. of IC 1 ’s digital output varies as a function of temperature. The circuit’s output period varies at a rate of 10 µsec/K. User-selected scale factors range from 10 to 640 µsec/K. The complementary, fixed-frequency ...
    23-06-2020
39. Active Antialias Filter for 24-bit ADC Features Low Distortion, High SNR
    Circuits Analogue Design Audio Measurement Analog Devices LT6202 LTC2380-24 LTC6363 LTC6655
    .. an increase in signal-to-noise ratio (SNR). Figure 2. The combined frequency response of filter plus ADC is flat out to a 10-kHz input. The inputs of this circuit are driven differentially with a 2.5-V p-p signal range via R3 and R5 (or one ...
    12-07-2020
40. SPI2CF - WLAN for AVR. Part 1
    Circuits Wireless Microcontrollers Usage
    The complete WLAN solution for AVR and other CPUs The page is about equipping an Atmel AVR microcontroller based system with a PRISM WLAN interface. This document is intended for people that already have experiences with the AVR microcontrollers ...
    30-06-2010

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