The LM358 family of dual op amps is among those hoary industry work-horse devices that are inexpensive and still have their uses. These parts’ outputs can approach (and for the inputs even include) their negative supply rail voltage. Unfortunately, this is not the case for the positive supply rail...
Extend the LM358 op-amp family's output voltage range
SCR topology transmogrifies into BJT two-wire precision current source
Recently, frequent Design Idea author Christopher Paul showcased an innovative and high performance true-two-wire current source using a depletion mode MOSFET as the pass device...
Ultra-low VCE(sat) NPN and PNP bipolar transistors from Diodes Incorporated maximize power density and efficiency in compact automotive designs
Diodes Incorporated announces an expansion of its automotive-compliant bipolar transistor portfolio with the introduction of the DXTN/P 78Q & 80Q series...
Simple speedy single-slope ADC
Ages ago, humankind crawled out of the primordial analog ooze and began to do digital. They soon noticed and quantified a fundamental need to interconnect their new quantized numerical novelties with the classic continuum of the ancestral engineer’s world. Thus arose the ADC...
Read isolated digital signals without power drain
Electronic systems must often isolate their inputs or outputs from the main reference common (ground). Various conditions can make necessary such galvanic isolation: the type of input sensor or driven actuator...
Tuneful track-tracing
Another day, another dodgy device. This time, it was the continuity beeper on my second-best DMM. Being bored with just open/short indications, I pondered making something a little more informative...
Active two-way current mirror
EDN Design Ideas published a design of mine in May of 2025 for a passive two-way current mirror topology that, in analogy to optical two-way mirrors, can reflect or transmit...
Ignoring the regulator's reference
DAC control (via PWM or other source) of regulators is a popular design topic here in Design Ideas (DIs) corner...
Quickly find pc-board shorts with low-cost tracer technique
A predominant failure mechanism for production pc boards is shorted traces. Finding hidden shorts is often time-consuming and frustrating...
Buck boost converter using XL6019 (bifilar choke)
This project features a compact and efficient DC-DC buck-boost converter, based on the XL6019 chip, designed to maintain a stable 12 V output over a wide input voltage range of 9 V to 30 V...