voltage

Simple Automatic Battery Discharge Analyzer

Simple Automatic Battery Discharge Analyzer using ATmega48 microcontroller

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The project allows you to analyze characteristics of unknown/junk battery especially the capacity and variation of the voltage on discharge. It is controlled with a PC via a serial port. No external power supply is required because it is powered by RS-232C signals. It uses ATmega48 as main controller for dummy load and constant current circuit. For …

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Hardware Protection – OverVoltage and OverCurrent

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Power Supply Parameters Three major power supply (Figure 1) architectures are defined for any engineer: 1.Linear Regulators. 2.Pulse width modulated switching (PWM). 3.High resonant technology switching. Vin(low), Vin(high) – minimum and maximum allowed input voltages, hence input voltage range. Iin(max) – maximum average input current. Outputs: Vout(min), Vout(max) – minimum and maximum allowed output voltages, …

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power supply circuit (1)

1 Watt White LED Power Supply Circuit for battery operation Using Atmega

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Download FreePC project file, gerber and png copper and silk-screen: 1wattledbuck.zip Introduction I have some 1 watt warm white LEDs left over from a project and the application for them was obvious: A better battery operated lamp for use when the power fails, which it does frequently, especially during the rainy season. And this one should …

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Overvoltage protection

An NRF24L01+ and FTDI Ready Atmega 328P-PU (3.3V, 500 MA) Microcontroller With Dual Power Capability, Undervoltage, Hysteresis, and Thyristor-Crowbar Overvoltage Protection

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This board is designed to safely drive a 3.3V microcontroller and connected accoutrements. It supports primary and backup power sources and provides numerous over and under voltage safeguards. The microcontroller here is a bare-bone, no-frills Atmega 328P-PU with no leds, driven by a 16 MHz crystal. An 8-Pin female connector is wired up to the …

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SST26WF064C – Low-voltage 64-Megabit SuperFlash® Memory Device From Microchip

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Microchip introduced a new 64Mbit Serial Quad I/O™ memory device—SST26WF064C with proprietary Super Flash® technology. The SST26WF064C writes with a single power supply of 1.65-1.95V and significantly lower power consumption. This makes it ideal for wireless, mobile, and battery-powered applications. This 64Mbit memory device also features DTR or Dual Transfer Rate technology. DTR lets the user access data of the …

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Increasing Battery Life With UB20M Voltage Detector

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Engineers at the University of Bristol have developed a three terminal pico-power chip that can cut standby drain in sensor nodes – even compared with today’s low-power microcontrollers. It does this by replacing the low duty-cycle sleep-wake-sleep pattern used on MCU-based sensor monitors, with ‘off’. A voltage detector powered by the sensor – there is …

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LT6658 – Precision Dual Output, High Current, Low Noise, Voltage Reference

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Features Dual Output Tracking Reference Each Output Configurable: 2.5V to 6V Output 1: 150mA Source/20mA Sink Output 2: 50mA Source/20mA Sink Low Drift: A-Grade: 10ppm/°C Max B-Grade: 20ppm/°C Max High Accuracy: A-Grade: ±0.05% Max B-Grade: ±0.1% Max Low Noise: 1.5ppmP-P (0.1Hz to 10Hz) Wide Operating Voltage Range to 36V Load Regulation: 0.1ppm/mA AC PSRR: 96dB …

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