Articles and news - 5

Transistors tame perfidious leakage inductance
Transistors tame perfidious leakage inductance
09.29.2022 Circuits

In flyback converters that use primary regulation, the loose coupling between the power secondary and the primary auxiliary windings often results in poor cross-regulation. This situation arises mainly from the leakage inductance...

Proto Power Supply
Proto Power Supply
09.29.2022 Circuits

This article describes a portable breadboard-friendly adjustable power supply, designed as an ideal supply for Arduino projects and other low-power circuits. It is capable of providing from 0 V to 5.5 V at up to 0.5 A, and is powered by two rechargable Li-ion cells...

China PCB Prototype and Fabrication Manufacturer
Linearized portable anemometer thermostated Darlington pair
Linearized portable anemometer with thermostated Darlington pair
09.26.2022 Circuits

This self-heated constant-temperature-delta transistor anemometer is cheap, rugged, and sensitive. It relies on the relationship between airspeed and thermal impedance of a heated air flow sensor...

Measure humidity temperature on one TTL
Measure humidity and temperature on one TTL line
09.25.2022 Circuits

By combining the responses of AD590 temperature sensor and a HS1101 humidity sensor, you can generate a single TTL-level signal containing information from both sensors...

Synchronous oscillator converts audio video FM
Synchronous oscillator converts audio, video to FM
09.21.2022 Circuits

The synchronous oscillator and the coherent phase-locked synchronous oscillator are universal multifunctional networks that track, synchronize, and amplify as much as 80 dB; improve SNR by as much as 70 dB; and modulate AM, FM, and FSK signals...

Schottky diodes improve comparator transient response
Schottky diodes improve comparator's transient response
09.20.2022 Circuits

In a previous Design Idea, a circuit switches precision dc reference voltages to the noninverting input of a high-speed IC comparator. The circuit uses a 2-to-1 multiplexer that functions in a BBM fashion. Multiplexers have a parasitic capacitance...

Alarm monitors rotational speed dc motor
Alarm monitors rotational speed of dc motor
09.19.2022 Circuits

You can use the circuit to monitor the rotating speed of a dc fan motor and sound an alarm if the motor stalls. One potential application of the circuit is monitoring the CPU-fan speed in a PC in which overheating the CPU can ruin the whole system...

Precision capacitive-sensor interface suits miniature instruments
Precision capacitive-sensor interface suits miniature instruments
09.15.2022 Circuits

In some applications of capacitive sensors, the instrument’s front end must be small enough to fit into a narrow space...

Wideband peak detector operates over wide
Wideband peak detector operates over wide input-frequency range
09.15.2022 Circuits

This Design Idea builds on a previous one to realize a precision peak detector with a bandwidth of 15 to 30 MHz or more, depending on the maximum input-signal level of your application...

FemtoAmp offers extreme gain range isolation
FemtoAmp offers extreme gain range & isolation
09.14.2022 Circuits

Amplification of sub-picoamp signal currents is always a design challenge, especially when gain adjustment is required that spans multiple decades. A straightforward approach to the design task would normally involve potentiometers and teraohm feedback resistors...