Essential 10 Arduino DIY Arduino board schematics
https://www.electronics-lab.com/essential-10-arduino-diy-arduino-board-schematics/
James @ seeed.cc has compiled a list of the most popular Arduino boards including schematics and PCB. You can download the files here. Arduino is now a very popular open source development board, many people are using the Arduino Development Board to develop interesting, creative product prototypes. Do it yourself DIY Arduino Development Board, isn’t […]
Reverse engineering a server CPU voltage regulator module
https://www.electronics-lab.com/reverse-engineering-server-cpu-voltage-regulator-module/
Andy Brown wrote a detailed article on reverse engineering a CPU voltage regulator: A recent ebay fishing expedition yielded an interesting little part for the very reasonable sum of about five pounds. It’s a voltage regulator module from a Dell PowerEdge 6650 Xeon server. I originally bought this because I had the idea of salvaging […]
Sonicare toothbrush teardown: microcontroller, H bridge, and inductive charging
https://www.electronics-lab.com/sonicare-toothbrush-teardown-microcontroller-h-bridge-inductive-charging/
Ken Shirriff did a teardown of a Sonicare electric toothbrush: The photos below show the top and bottom of the toothbrush internals. I expected to find a simple, low-cost mechanism, so I was surprised at how much complexity there was inside. The vibration mechanism (right) is built from multiple metal and plastic parts screwed together, requiring […]
LT3086 – 40V, 2.1A Low Dropout Adjustable Linear Regulator with Monitoring and Cable Drop Compensation
https://www.electronics-lab.com/lt3086-40v-2-1a-low-dropout-adjustable-linear-regulator-monitoring-cable-drop-compensation/
Graham Prophet @ www.edn-europe.com discuss about LT3086 LDO. The 40V, 2.1A low dropout linear regulator (LDO) includes current monitoring with externally settable current limit and temperature monitoring with external control of thermal limit temperature. The device includes a programmable power-good status flag, cable drop compensation and easy paralleling. The current reference in the LT308x LDO […]
The new 800V CoolMOS MOSFET from Infineon
https://www.electronics-lab.com/new-800v-coolmos-mosfet-infineon/
Thomas Scherer @ elektormagazine.com shares the news about a CoolMOS Mosfet from Infineon. The latest 800V CoolMOS P7 800V MOSFET from Infineon is based on their superjunction technology. The device is available in twelve classes of RDS(on) beginning with 0.28 Ω and in six package options. It is particularly suited to high voltage switching applications, flyback […]
230V AC dimmer, mains isolated, using PIC12F629
https://www.electronics-lab.com/230v-ac-dimmer-mains-isolated-using-pic12f629/
This is a very simple mains isolated dimmer with a triac output (phase control). It uses timer0 to do the timing. There is no user interface, the value of the triac ignition delay after a zero crossing is defined by setting the reload value of timer0 (Tmr0) in the software directly. This value can e.g. […]
Short circuit tracer uses low power
https://www.electronics-lab.com/short-circuit-tracer-uses-low-power/
Dan Meeks shares his design idea on edn.com: This Design Idea presents a low power short circuit finder that capitalizes on the ear’s sensitivity to changes in frequency. The heart of the circuit is a voltage-to-frequency converter (based on Linear Tech’s AN45, Figure 13, by Jim Williams), which converts millivolt-level DC voltages to a wide […]
L293D Motor Direction Controller
https://www.electronics-lab.com/l293d-motor-direction-controller/
baelza.bubba @ instructables.com show us how to build a DC motor direction controller using L293D. I designed this DC Motor Direction Controller so that I could give direction control to DC motors that I am building into mini tools (drill, lathe, table saw, solder smoke extractor, etc.). While, I don’t need direction control for all […]
Convert $2 LED Lamp to $50 Smart Lamp
https://www.electronics-lab.com/convert-2-led-lamp-50-smart-lamp/
taifur @ instructables.com show us how to convert a simple LED lamp to a smart one that can be controlled using a smartphone. A smart bulb is an internet or Bluetooth-capable LED light bulb that allows lighting to be customized, scheduled and controlled remotely. Smart bulbs are among the most immediately successful offerings in the […]
Laser for sending music over a distance
https://www.electronics-lab.com/laser-sending-music-distance/
Light is a very popular means of communication. Today, optical fiber communication is the backbone of telecommunication and internet. Light is guided through a fiber optic cable in such systems to achieve low-attenuation and high speed data transmission. Question is: Is it possible to use light for communication without a guiding medium? The answer is […]