The circuit in Figure 1 lets you switch high-voltage power to a grounded load with a low-voltage control signal. The circuit also functions as a submicrosecond circuit breaker that protects the power source against load faults. Power switches to the load when you apply a logic-level signal to the output control terminal. circuitWhen the signal […]
Inexpensive power switch includes submicrosecond circuit breaker Read More »
In an effort to resume previous work [A, B, C, D] on developing a crystal oven for radio frequency transmitter / receiver stabilization purposes, the first step for me was to create a device to accurately measure and log temperature. I did this with common, cheap components, and the output is saved to the computer (over 1,000 readings
Precision Temperature Measurement Read More »
Saelig Company, Inc. (www.saelig.com) has introduced the new CGM-101 CircuitGear Mini – a unique, low-cost PC-based instrument which provides the features of six devices in one USB-powered compact box: 2-channel 11-bit 2MSa/sec 200kHz oscilloscope, 2-channel spectrum analyzer, 2MSa/s 8-bit arbitrary-waveform/standard-function generator with 8 digital I/O lines. It also functions as a network analyzer, and a
CircuitGear Mini CGM-101 Oscilloscope Read More »
This project is a departure from that of my normal sort. It is based around an operational amplifier (op-amp)… Yup I’ve transgressed to the dark side. Actually I have nothing against integrated circuits (IC) or solid state devices and in fact use a number of solid state components in my designs. This project is for
DIY OPA2134 RIAA Phono Preamplifier Read More »
This collection of circuits provides step-up voltage regulation for single cell and dual cell Alkaline, NiMH, and Li+ battery driven applications. Regulate your battery driven app with an efficient converter from Maxim. Your battery-powered application needs regulation. This collection of circuits provides step-up voltage regulation for single- and dual-cell Alkaline, NiMH, and Li+ battery-driven applications.
Maxim Power for Single-Dual Cell Battery Driven Apps Read More »
Introduction For some time I have been planning to build a number of devices that make use of stepper motors. Since I have no experience in using stepper motors I had no idea what parts, what driver and controller circuits I would need to get them running. After extensive research on the internet I decided
Bipolar Stepper Motor Driver Circuit with LMD18245 Read More »
Analysts have noted Apple’s comments on the importance of new services in its plans and an integrated fingerprint sensor capability in a mobile phone could prove the key enabler – literally opening the door to a new class of authentication-based apps and services – likely leveraging Apple’s move into automotive markets that Apple CEO Tim
Inside the iPhone 5S and iPhone 5C Read More »
Here is a small collection of circuits that provide an interface to sensor transducers including pressure, temperature, and others. ere’s a resistance temperature detector (RTD) interface circuit that is compatible with a range of standard RTD sensors including PT100. Output is digital via SPI bus. This circuit provides a highly integrated analog sensor signal conditioner
Maxim’s Sensor Interface Circuits Read More »
The silicon MOSFET has become a key component in the design of DC/DC converters, providing the high-speed switching and current-handling capability needed to implement high-efficiency, pulse-width-modulation-based control strategies. The drive towards higher efficiency is placing more intense demands on MOSFETs, particularly in designs that have constraints on size, reducing the amount of space that can
MOSFETs Target the Major Efficiency Losses in DC/DC Converters Read More »
Before working as an applications engineer, I worked as an IC test development engineer here at TI. One of my projects was to characterize an I2C temperature sensor. After writing some software, I threw together a hand-wired prototype board. I was in a hurry, so I left off that pesky decoupling capacitor. Who needs it,
The decoupling capacitor…is it really necessary? Read More »
