N&V May 2015
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Price: $6.00
Product ID : SKU17307




  • Beyond the Arduino — Part 3 by Andrew Retallack 
    This time, we’ll focus on interacting with the bare-metal microcontroller by handling both digital and analog inputs.
  • How to Use a Transistor as a Switch by Roger Secura 
    Whether you need to flash an LED, energize a relay, turn a buzzer or alarm on or off, or invert a voltage level, the NPN transistor switch can easily solve your problem. This article shows you how to use a transistor as a simple SPST switch.
  • Fix Up that Old Radio! by J.W. Koebel 
    It’s fun and easy to bring vintage radios back to life! Follow along as a 1937 DeWald radio is restored.
  • Receiving Data with a Low Cost Shortwave Radio by George R. Steber 
    A computer, some powerful software, and a shortwave receiver combine to make decoding many types of radio transmissions possible.


  • Build the Retro Regen Radio by Dick Whipple 
    This back-to-the future one-tube radio is made with readily available parts, operates on 12 volts, and offers amazing performance.


  • Q&A by Tim Brown
    Reader Questions Answered Here
    A question on op-amp accuracy, getting certified, and some tips on batteries.
  • PICAXE Primer by Ron Hackett
    PICAXE-PC Serial Communication — Part 1
    We’ll continue our experiments with the Prolific cable, but this time focus on sending data back and forth between a PICAXE processor and a PC.
  • The Ham’s Wireless Workbench by H. Ward Silver
    RF Oscillators
    Move up in frequency to the oscillators which make the signals that drive the ham’s wireless world.
  • Open Communication by Louis E. Frenzel
    Serial I/O Data Interfaces: Part 2
    Get familiar with the high speed gigabit serial interfaces that dominate I/O today since we all use at least one of these regularly.
  • The Design Cycle by Fred Eady
    Wi-Fi on the Big Wire
    Classic embedded Wi-Fi web servers based on microcontrollers have met their match. The ACKme Numbat stuffs an ARM microprocessor, Wi-Fi radio, TCP/IP stack, UART, real time clock, multiple GPIO pins, analog-to-digital converters, PWM generators, SPI portals, 1 MB of serial Flash, and an I2C interface into a 0.8” x 0.6” x 0.11” SMT package. All you need is a PC serial port and a terminal emulator to gain access to the Numbat’s rich set of resources.

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