Designing a simple and cheap temperature logger. Part 4: The junk in the trunk. Posted on February 3, 2012 I somehow managed to solve the problem of the serial flash memory write block size vs. the erase block size. I just had to write a custom FAT12 filesystem.. As seen before, the Temperature Logger will act like […]
Today I stumble across a neat/new feature in Eagle I haven’t seen before. Prolly in there since early versions 7, but at least it is present in version 7.5.0 (current version at writing is 7.7). Some PCB manufacturers will accept panelized PCB and you can save a few bucks by combining a few small designs into a larger design. This
This Arduino-based pager by Mike Schaus will allow you to send and receive real SMS text messages. This messaging device has its own SIM card and phone number. 4 January, 2017elab 2128 1 This Arduino-based pager by Mike Schaus will allow you to send and receive real SMS text messages. This messaging device has its own SIM
Description Create a design and simulate using EE-Sim: [MAX15058] The MAX15058 high-efficiency, current-mode, synchronous step-down switching regulator with integrated power switches delivers up to 3A of output current. The device operates from 2.7V to 5.5V and provides an output voltage from 0.6V up to 94% of the input voltage, making the device ideal for distributed
Maxim adds mosfets to ‘smallest’ DC-DC converter Read More »
I was thinking about making a resistor decade box, but I found the rotary switches that are used in these most of the time rather expensive and a bit old fashioned. That’s why I decided to use a rotary encoder and select the resistors with a microcontroller. Now I only had to find a way
UPDATE: I eventually decided to use a single switching regulator that I found on digikey which is both awesome and well priced. See this blog post update about it. My first DoorBell Mote prototype was working nicely and it allowed monitoring the door bell (while also triggering it remotely – toddlers love it). But I wanted more.
Modern DC/DC controllers from company Infineon, like TLF51801ELV manage even big challenges. Perhaps everyone knows, that modern switch-mode power supplies are able to efficiently convert voltage and to replace linear power supplies. Features of ready-made DC/DC modules as well as SMPS controllers themselves are still better and nowadays it´s no problem to construct a 10A
10A with 96% efficiency … no problem for TLF51801 Read More »
Description The ISL9307 is an integrated mini Power Management IC (mini-PMIC) ideal for applications for powering low-voltage microprocessor or multiple voltage rails with a battery as an input source, such as a single Li-ion or Li-polymer. ISL9307 integrates two high-efficiency, 3MHz, synchronous step-down converters (DCD1 and DCD2) and two low-input, low-dropout linear regulators (LDO1 and
Introducing… the Energy Wristband A wristband that tells you energy changes in your home. It connects via a Raspberry Pi computer to a base station like a‘current cost’ or similar. When a change in energy usage occurs, the wristband vibrates and a small LED bargraph shows your current usage from 1 to 4. Realtime energy
Scientists working at the Stanford Institute for Materials and Energy Sciences (SIMES) claim to have created a molecule-sized electronic component just a few nanometers long that conducts electricity in only the one direction. In essence, a rectifier diode, but one so small that it may one day help replace much bulkier diodes and other semiconductors
Buckyballs and diamondoids combined to create molecule-sized diode Read More »
