I’ve been working with dc power supplies and batteries for over 30 years now and every day I employ Ohm’s Law, V = I·R, to solve some problem or make some calculation related to dc power...
Generating negative resistance
Passive RC circuit produces gain
Could a simple passive RC network without any transformers, inductors, switches, or non-linear components produce a voltage gain?...
Toshiba introduces 40V eFuse ICs in small TSOP6F packages for power line circuit protection in industrial and consumer applications
Toshiba Electronics expands its electronic fuse (eFuse) lineup with the introduction of the 40 V TCKE6 series...
Self-oscillating sawtooth generator spans 5 decades of frequencies
There are many ways of generating analog sawtooth waveforms with oscillating circuits. Here’s a method that employs a single supply voltage rail to produce a buffered signal whose frequency can be varied over a range from 10 Hz to 1 MHz...
Transformerless 85-260VAC to 12VDC-0.2A power supply
Whenever you hear the transformerless supply term, you initially imagine the capacitor-based solution: a high-voltage non-polarized capacitor in series with the mains line, a bridge rectifier, a Zener diode, and a filtering electrolytic capacitor...
Toshiba launches high-speed colour CCD linear image sensor for Automated Optical Inspection equipment
Toshiba Electronics introduces the TCD2400DG, a new lens reduction type CCD linear image sensor designed to meet the demanding requirements of modern optical inspection equipment...
Full circle current loops: 4 mA-20 mA to 0 mA-20 mA
A topic that has recently drawn a lot of interest and no fewer than four separate design articles here in Design Ideas, is the conversion of 0 to 20 mA current sources into industrial standard 4 mA to 20 mA current loop signals...
Another silly simple precision 0-20mA to 4/20mA converter
A recent Design Idea, “Silly simple precision 0/20 mA to 4/20 mA converter,” by prolific DI contributor Stephen Woodward uses the venerable LM337 regulator in a creative configuration along with a few passive components, to translate an input 0-20 mA current source...
Short push, long push for sequential operation of multiple power supplies
Industrial systems normally use both analog and digital circuits. While digital circuits include microcontrollers that operate at 5 VDC, analog circuits operate generally at either 12 or 15 VDC...
IR distance ranger covers 1 to 20 cm
Commercially available IR distance rangers typically handle a 3- to 30-in. detection distance. Many times, it is necessary to determine smaller distances...