Contactless Controlled Automatic Wardrobe LED Light

Contact-less controlled automatic wardrobe light turns on the LED when you open the wardrobe door. Τhe project is based on Hall effect IC including LED driver and tiny magnet. Board doesn’t require any mechanical switch. When magnet is close to the board, LED is off, when you open the wardrobe door magnet goes far from hall IC and its turn on the LED, the IC also has special features like soft start and soft off. This board can be used in other applications like Automotive Gloves boxes and Storage, task lighting, automotive vanity mirrors. The APS13568 is the heart of the project. The IC can drive LED current up to 150mA. I have set the current 100mA approx. with help of R3. C2 is provided to set the FADE-IN/FADE-OUT time. The value of C2 can be changed as per application requirement.

Contactless Controlled Automatic Wardrobe LED Light – [Link]

Build the World’s Smallest Atomic Clock

Illustration: Emily Cooper

Build the World’s Smallest Atomic Clock, Trap a Nitrogen Atom in a Carbon Cage. By Kyriakos Porfyrakis and Edward A. Laird @ ieee.org:

An atomic clock begins with an oscillator [see diagram], which creates a frequency close to the energy level of the atom being used. If the oscillator deviates from the reference frequency, the atom’s absorption pattern changes, the change is detected by a laser, and the laser’s signal is used as feedback to tune the oscillator. For the very best performance, the atoms must be electromagnetically isolated, which requires equipment that can take up entire rooms.

Build the World’s Smallest Atomic Clock – [Link]

Open Source Ethernet Audio Broadcaster

Luca Pascarella @ open-electronics.org presents how to setup their open source ethernet broadcaster. He writes:

Recently, we have presented an Ethernet audio streaming unit. In particular, we have shown how to configure the boards to work with other similar devices or with VLC Media Player, setting up a point-to-point or a broadcast streaming in all possible configurations. Also in the first episode, we analyzed the electrical circuit and the components choice. Now it is time to describe the board software advanced options and how to update firmware via Internet or manually.

Open Source Ethernet Audio Broadcaster – [Link]

Teardown, Repair & Experiments with an Agilent 8562E 30Hz – 13.2GHz Spectrum Analyzer

Teardown, Repair & Experiments with an Agilent 8562E 30Hz – 13.2GHz Spectrum Analyzer – [Link]

AMSAT MPPT

by Bryce Salmi @ faradayrf.com:

The Radio Amateur Satellite Corporation, AMSAT, recently designated RadFxSat as AO-91 after its successful deployment from a Delta II rocket as a secondary payload to NASA’s JPSS-1. RadFxSat is the first of several AMSAT satellites which are flying a Maximum Power Point Tracker (MPPT) designed and built by Brent and I as a continuation of our Rochester Institute of Technology (RIT) senior design project. The story of the Fox-1 MPPT is a great example of how amateur radio is what you want it to be.

AMSAT MPPT – [Link]

36V, 2-ch, 1.6A synchronous buck LED driver has I²C dimming

Under the “Power by Linear” branding it recently created for the product lines it acquired with its purchase of Linear Technology, Analog Devices has added the LT3964, a dual channel, 36V, high efficiency, synchronous, step-down LED driver with internal 40V, 1.6A power switches and an I2C interface that simplifies LED dimming control.

IoT Protocols for the Electronics Designer

Here is an interesting article from autodesk.com about IoT for the Electronics Designer. Learn how to choose the Right Protocol for Your First Project.

The Internet of Things (IoT) is connecting our world together more intimately than ever. It’s also adding a whole new level of complexity and confusion on the shoulders of the electronic designer. The biggest problem is the overwhelming amount of choices and considerations that have to be made for an IoT project. Which protocol is the best? Will my chosen protocol be irrelevant a year from now? Do I have the time to design RF and an antenna? In this blog, we’ll be focusing on the topic of protocols, how they fit into the networking stack, and how you can use modules to make easy work for your first IoT project.

Solid-state battery – a hybrid of battery and capacitor

With CeraCharge, TDK has developed the world’s first solid-state battery in SMD technology. In contrast to most common battery technologies, CeraCharge works without any liquid electrolytes. by Christoph Hammerschmidt @ eenewseurope.com:

Similar to ceramic capacitors, the CeraCharge is based on multilayer technology and combines a high energy density in the smallest possible space with process reliability in the manufacture of multilayer components. The use of a ceramic solid as electrolyte also excludes the risk of fire, explosion or leakage of electrolyte fluid.

In the compact size EIA 1812, the battery, which can be rechargeable several dozen to 1000 times, offers a capacity of 100 µAh at a nominal voltage of 1.4 V depending on the requirements. In the short term, currents in the range of a few mA can also be drawn.

Neutrino 3.0: The 32-bit Arduino Zero compatible!

The Neutrino 3.0 is an inexpensive, open source, miniaturized version of the Arduino Zero! Featuring a 32-bit ARM processor running at 48MHz, and boasting 32K of ram, the Neutrino is far more capable than your typical Arduino. And because it has the same processor and pinout, all libraries written for the Zero will work on the Neutrino without any modification!

Technical Specs

  • Microcontroller: Atmel ATSAMD21G18 ARM Cortex M0+
  • Clock speed: 48 MHz
  • Operating voltage: 3.3V
  • I/O pin limits: 3.3V, 7 mA
  • Digital I/O pins: 14, with 12 PWM
  • Analog input pins: 6, 12-bit ADC channels
  • Analog output pins: 1, 10-bit DAC
  • Flash memory: 256 KB
  • SRAM: 32 KB
  • Voltage regulator: 3.7-5.5V input / 3.3V, 300mA output
  • Dimensions: 1.4 x 0.7″ (36mm x 18mm)

The project is live on kickstarter and has 14 days to go.

Wand-Pi-8M: New Open Source SBC

The Wand-Pi-8M is an open source hardware project with community support and a full range of Linux-based distros, starting with Yocto, Ubuntu, and Android Oreo. The board schematics and software source will be available for free download.

This Raspberry Pi like SBC comes in three different  models:

  • Wand-Pi-8M-Lite ($89) – 1GB of DDR4 and 4GB eMMC
  • Wand-Pi-8M-Pro ($99) – 2GB DDR4 and 8GB eMMC
  • Wand-Pi-8M-Deluxe ($119) – 2GB DDR4 and 16GB eMMC

All three Wand-Pi-8M models use the quad-core, Cortex-A53 i.MX8M Quad clocked at up to 1.3GHz.

Specifications

  • Processor — i.MX8M (4x Cortex-A53 @ 1.3GHz); Vivante GC7000Lite GPU; Cortex-M4 MCU
  • RAM — 1GB DDR4 (Lite) or 2GB DDR4 (Pro and Deluxe)
  • Storage — 4GB (Lite), 8GB (Pro), or 16GB (Deluxe) eMMC
  • Display — HDMI port at up to 3840 x 2160 (4K HDR)
  • Wireless (Pro and Deluxe only) — Qualcomm Atheros QCA9377 module with 802.11 a/b/g/n/ac and Bluetooth 4.2 (BR+EDR+BLE) and MHF4 antenna connector
  • Networking — Gigabit Ethernet port (Atheros AR8035)
  • Other I/O:
    • USB 3.0 host port
    • USB 3.0 Type-C port with 5V input support
    • Micro-USB debug port
    • 2x MIPI-CSI
  • Expansion — 40-pin RPi-compatible GPIO header; mikroBus connector
  • Other features — Reset button
  • Power — 5V DC input via USB Type-C; NXP PF4210 PMIC
  • Operating temperature — 0 to 50°C
  • Shock resistance — 50G/25ms
  • Vibration resistance — 20G/0-600Hz
  • Dimensions — 85 x 56 x 19.3mm
  • Operating system — Linux, Yocto, Ubuntu, Android Oreo