Changing of the Guard

I would like to introduce myself as the new editor-in-chief of Marian Popescu has created a wonderful and broad community that I look to continue to engage with and have fun.

High-band DPD Demodulator with Integrated DSA and RF Switch

GaryC - 02/22/2016

The IDTF1370 is a digital pre-distortion demodulator (DPD) for power amplifiers linearization in BTS transmitter that utilize the [...]

Power-on Reminder with LED Lamp

GaryC - 02/21/2016

Many a times equipment at workstations remains switched on unnoticed. In this situation, these may get damaged due [...]

F1200 Low-noise Digital IF VGA with FlatNoise

GaryC - 02/20/2016

The F1200 of an IDT is a digitally controlled intermediate frequency differential variable gain amplifier that adjusts the [...]

Staff with Click Sound and Obstacle Alarm

GaryC - 02/16/2016

People who are visually impaired usually use a staff to guide them as they walk. They tap with [...]

Wearable WiFi Detector

GaryC - 02/14/2016

A WiFi (Wireless Fidelity) is a technology that uses the 2.4GHz UHF and 5GHz SHF ISM radio bands to allow devices such as computers, smartphones, digital cameras, tablet computers, etc. to network. Nowadays the WiFi [...]

MC34937 Typical Connection for 3 Phase Motor

GaryC - 02/12/2016

This reference design is a typical connection for MC34937APEK to a 3-phase brushless DC motor. The supply of [...]

MC9RS08KB4CFK Minibot

GaryC - 02/10/2016

The Minibot is a small autonomous robot vehicle that uses phototransistor that can detect lightness patterns on the [...]

Kinetis KEA128 StarterTRAK for CAN Applications

GaryC - 02/05/2016

This reference design is a low-cost development kit based on Kinetis EA series MCUs that allows faster prototyping [...]

Battery Powered Frequency Meter (0 to 20kHz)

GaryC - 02/02/2016

The circuit is a simple digital frequency meter that is made of a frequency-to-voltage converter and an analog-to-digital [...]
555 Propagation Delay Oscillator Schematic

555 Propagation Delay Oscillator

Jim Keith - 01/19/2016

With no external components, a 555 can be turned into an oscillator that runs typically in the range of 1 to 2.5mHZ –or who needs a timing capacitor? It is essentially a stripped down version [...]

Unipolar Stepper Motor Driver Circuit

GaryC - 01/18/2016

This unipolar stepper motor driver circuit is used to drive a 12V unipolar stepper motor with a current [...]
555 Schmitt Trigger Logic Inverter Level Translator

Versatile 555 Schmitt Trigger /Logic Inverter /Level Translator

Jim Keith - 12/13/2015

More undocumented applications for the 555 ‘oscillator:’ Not all applications oscillate as we will see. Most are knowledgeable [...]
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