App note: Using 1-wire for flexible electro-mechanical contact applications

1-wire solution from Maxim Integrated for electro-mechanical attachment. Link here Adding electronic functionality to traditional nonelectronic peripherals and consumables is a common application requirement. This is typically driven by system requirements, including storage of calibration data, manufacturing information, or original equipment manufacturer (OEM) authentication of the peripheral, accessory, or consumable. In addition to selecting the […]

App note: How to improve ADC measurement accuracy with high input source impedance

Improving ADC accuracy a topic reviewed in this app note from Maxim Integrated. Link here Unbuffered ADCs are commonly used due to their simplicity of design. However, these ADCs have limited acquisition time and require input signals to settle within the allocated time. These ADCs must track their input signals for intervals longer than the […]

App note: dV/dt ratings for low voltage and high voltage power MOSFET

App note from Alpha & Omega Semiconductor, Inc. about the importance of voltage ramp and diode recovery dV/dt and avalanche breakdown ratings of power MOSFET. Link here (PDF) dV/dt rating is an important parameter for the ruggedness of power MOSFET. It is usually a parameter shown in high voltage Power MOSFET (BVdss ≥ 500V) datasheets, […]

App note: Reliability of the OSLON® Black Series family

App note from OSRAM about their new OSLON® series LEDs. Link here (PDF) The OSLON® Black Series family was developed particularly for applications that require maximum luminous flux with little consumption of space. The package also makes the series predestined for applications that experience high temperature fluctuations because very good solder point reliability can be […]

Reverse-engineering a vintage comparator chip

Reverse-engineering a vintage comparator chip: So what is this chip? Maybe it’s simply four comparators, but they could have a specific purpose. The chip could be a converter for four differential input signals, e.g. DCS (Differential Current Switch) logic. Another chip in the family seems to be Emitter-Coupled Logic, so this chip could be four […]

App note: Active cable usage with ON Semiconductor Redrivers

App note from ON Semiconductors about the need for long cables for high speed Type-C and Type-A connectors. Link here (PDF) With the increasing requirement for high speed transfer of larger bulk of data, better quality video and power delivery, change over from analog to digital videos, bi−directional transfers, it become essential to use a […]

App note: Automotive pre-regulator reference design and evaluation board overview

App note from ON Semiconductors on their various reference designs on automotive regulator topologies. Link here (PDF) ON Semiconductor provides several reference designs for automotive synchronous buck pre−regulators covering a broad range of applications such as ADAS, cluster, body and infotainment.

A passive tunable HF preselector

Dave Richards (AA7EE) has written an article detailing his tunable passive HF preselector: When I built the VE7BPO DC Receiver Mainframe recently, it wasn’t intended to end up as a final finished project. The intention was more to have it as part of an experimental platform. The little box that contains the DBM, diplexer, and […]

App note: Super Barrier Rectifier (SBR®) improves automotive supply line protection to ISO7637

App note from Diodes Incorporated on their SBR technology which can supports ISO standard supply protection. Link here (PDF) Electrical disturbances in an automotive environment present reliability and functional risks to the various electronic systems and components that may be exposed. Many modules, for example electronic control units (ECUs), have sensitive microcontrollers at their core […]

App note: AL8860Q LED driver remote mounting and LED open/short to GND protection solution

App note from Diodes Incorporated on their AL8860Q LED driver with built-in faults protection. Link here (PDF) The AL8860Q is a hysteresis mode DC-DC buck LED driver, designed for driving single or multiple series connected LEDs in automotive lamps. In some circumstances the LED string should become in fault status such as open-circuit, short-circuit, LED […]

MetaClockClock build

Erich shared detailed instructions of how to build the MetaClockClock project, a set of individual analog ‘clocks’: The ‘MetaClockClock’ project is using multiple small dual-shaft stepper motors which are usually used in instrumentation clusters. In this project multiple such motors are interconnected on a RS-485 bus and can be controlled by a master to display […]

App note: Performance comparison of 1200 V SiC MOSFET and Si IGBT Used in power integrated module for 1100 V solar boost stage

App note from ON Semiconductors comparing the performance between SiC MOSFET and Silicon IGBT in a similar and compatible power modules. Link here (PDF) This application note compares the performance of two power integrated modules (PIMs) in the boost stage of an 1100 V solar inverter. One PIM used state−of−the−art silicon 1200 V IGBT (part […]

App note: Characteristics and driving recommendations of ON Semiconductor Gen 1 1200 V SiC MOSFETs & modules

App note from ON Semiconductors on their SiC MOSFET’s key characteristics and how to drive them. Link here (PDF) Silicon carbide (SiC) is part of the wide bandgap (WBG) family of semiconductor materials used to fabricate discrete power semiconductors. Conventional silicon (Si) MOSFETs have a bandgap energy of 1.12 eV compared to SiC MOSFETs possessing […]

App note: The thermal measurement point of LEDs

App note from OSRAM on different thermal masuring locations of LEDs. Link here (PDF) When current passes through the junction area of a chip, light is emitted. Not only light is generated, but also a lot of heat. Good thermal management is a major factor for the stable performance of LEDs in applications. However, a […]

HP 27201A, the world’s first speech synthesizer by a major computer company

smbakeryt has written an article on reverse-engineering the protocol used by the HP 27201A: The HP 27201A is a TMS5220 based speech synthesizer released in 1983. According to the HP museum, it’s the first synthesizer designed by a major computer computer. Yes, the TI99/4A’s speech synthesizer uses the same IC and is at least contemporary […]

Over engineered true random value generator

maker_ATOM shared detailed instructions of how to build over engineered true random value generator, project instructables here: Random numbers are often used in daily for example in encryption, gambling, gaming and much more. These numbers are generated by computers using complex algorithm but it can be predicated if we know the seed value and the […]