When your friends are off to the post-apocalyptic Wasteland Festival and present you with a defunct Power Wheels clone toy Jeep to make ready for the festivities, what are you to do? If you happen to be [Victor Frost], soup it up with new electrics and uprated steering, and send it forth into the hideous no-mans […]
A TOY JEEP FOR AFTER THE APOCALYPSE Continue Reading
What’s round, has what looks like a vacuum tube in the center, and was made in the 1950s by HP? We don’t know either, but [The Signal Path] restored one and shows us this mystery instrument in a recent video that you can see below. We aren’t going to spoil the surprise over what the device is,
MYSTERY HP GEAR TEARDOWN Continue Reading
Maxim’s MAX17301 and the MAX17311 1-cell fuel gauge devices allow fine tuning of voltage and current thresholds based on various temperature zones with a low quiescent current of 24μA Maxim Integrated Products has developed a 1-cell battery fuel gauge that can provide counterfeit and cloning protection with low quiescent current. The configurable setting in the MAX17301 and
FUEL GAUGES OFFER HIGHEST LEVEL OF BATTERY PROTECTION Continue Reading
Relays are often used as electrically controlled switches. Unlike transistors, their switch contacts are electrically isolated from the control input. On the other hand, the power dissipation in a relay coil may be unattractive for battery-operated applications. You can lower this dissipation by adding an analog switch that allows the relay to operate at a
HOW TO LOWER RELAY POWER CONSUMPTION Continue Reading
This sketch is used by Exercise: Sensor Fade. Full Source Code The full code is all in one file SensorFade.ino. // SensorFade – read a photosensor and control several LEDs at different brightnesses // // Copyright (c) 2016, Garth Zeglin. All rights reserved. Licensed under the // terms of the BSD 3-clause license as included in LICENSE.
Arduino Sketch Sensor Fade Continue Reading
The MAXREFDES1048 synchronous step-down dc-dc converter reference design from Maxim Integrated Products is based on the MAX17504, a high-efficiency, high-voltage, synchronously rectified step-down converter with dual integrated MOSFETs can operate over a 4.5V to 60V input. The MAXREFDES1048 reference design operates over an input voltage range of 18- to 36-Vdc and delivers an output of 3A. The MAX17504 can deliver up to
3.3V/3A, WIDE-INPUT, SYNCHRONOUS, STEP-DOWN DC-DC REFERENCE DESIGN Continue Reading
I have always wanted to build a fairly capable LCR meter that could cope with real world use in my own personal lab. This would mean reasonably good accuracy across a wide range of L, C and R. Fortunately, I got the time to do just that this year in the 3rd year Instrumentation module
LOW COST HIGH ACCURACY STM32 FFT LCR METER Continue Reading
Sasa Karanovic build an analog monitoring system that is able to show your computer’s resources on 4x beautiful dials. He writes: In the video above, you can see first a power up sequence where all four dials go from zero to 100% and back to zero after which they start showing real time CPU, Memory, Network
DIY ANALOG RESOURCE MONITOR FOR YOUR PC Continue Reading
Many years ago (September 2009) I made a simple bench power supply using an LT1083 7.5A linear regulator with adjustable output voltage designed to be used with a 19.5V 3.42A laptop power supply. It still works fine after years of abuse, but my choice of output power connectors was poor (3 pin headers, the sort
LAPTOP BENCH POWER SUPPLY WITH FAN CONTROLLER Continue Reading
Allegro Microsystems’ device consists of a linear Hall sensor circuit with a copper conduction path located near the surface of the die. The Allegro ACS711 provides economical and precise solutions for AC or DC current sensing in <100 V audio, communications systems, and white goods. The device consists of a linear Hall sensor circuit with a copper conduction
ACS711 HALL EFFECT LINEAR CURRENT SENSOR Continue Reading
