This time, we’ll focus on interacting with the bare-metal microcontroller by handling both digital and analog inputs.
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.
It’s fun and easy to bring vintage radios back to life! Follow along as a 1937 DeWald radio is restored.
A computer, some powerful software, and a shortwave receiver combine to make decoding many types of radio transmissions possible.
This back-to-the future one-tube radio is made with readily available parts, operates on 12 volts, and offers amazing performance.
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.
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.