The versatility of the venerable LMC555 CMOS analog timer is so well known it’s virtually a cliche, but sometimes it can still surprise us...
Tune 555 frequency over 4 decades
Measure resistance and temperature with a sound card
Unless you add a measurement instrument to your computer, you have only the sound card as an analog I/O port. You can use the sound card to digitize ac analog voltages but only within a limited range...
Littelfuse expands magnetic sensor portfolio with ultra-low-power omnipolar TMR switches
Littelfuse, Inc. announced the launch of two next-generation omnipolar magnetic switches, the LF21173TMR and LF21177TMR. These devices combine Tunneling Magnetoresistance and CMOS technologies in a compact LGA4 package...
Charge coupled MOSFET relay
This circuit acts as an AC/DC relay with a rating up to 50 volts peak and up to 10 Amps of current...
Combine two TL431 regulators to make versatile current mirror
Various designs for current mirror circuits have been an active topic recently here in Design Ideas. Usually, the mirror designer’s aim is to make the mirror’s input and output currents accurately equal, but Figure 1 shows one that takes a tangent...
FM receiver/radio using Arduino and TEA5767
The schematic diagram of the device. As it is clear, the circuit consists of 3 main parts: Arduino-Nano (Controller), FM receiver module, and the audio amplifier...
Ignoring the regulator's reference redux
Stephen Woodward’s “Ignoring the regulator’s reference” Design Ideas is an excellent, working example of how to include a circuit in the feedback loop of an op amp to support the stabilization of the circuit’s operating point...
Nuvoton releases compact high-power violet laser diode (402 nm, 1.7 W)
Nuvoton Technology announced the launch of its compact high-power violet laser diode KLC435FS01WW (402 nm, 1.7 W) which achieves industry-leading optical output power in the industry-standard TO-56 CAN package...
Allegro sets new standard for efficiency in high-power systems with ultra-low-loss isolated current sensor
Allegro MicroSystems announced the ACS37200, a galvanically isolated current sensor that provides a breakthrough solution to the efficiency and power density challenges in high-current applications...
Extend the LM358 op-amp family's output voltage range
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...