Electronics News Updates Projects

ATMEGA4809: An Advanced Microcontroller for the Modern Era

Today, microcontrollers are present in virtually all forms of electronic and software-based gadgets and structures. Due to these characteristics, they have been able to supply anything from home appliances, industrial products, machinery, and consumer electronics. Leading the pack in microcontroller technology is Atmel, now part of Microchip Technology, which brought a new look to the […]

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LOW POWER LCD CLOCK BASED ON AN AVR128DA48

Electronics News Updates / Muhammad Bilal

The Liquid Crystal Displays (LCDs) are a type of flat panel display that uses liquid crystals for operation. They are relatively old technology but can be seen in clocks, laptops, computers, calculators, dashboards, and other electronic projects and devices because of their advantages over newer types of displays, including low power, low cost, and readability.

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LIFEPO4 CHARGER BOARD BASED ON CN3058E

Electronics News Updates / Muhammad Bilal

A 3.6 V set point is not a de-rated 4.2 V set point Both chemistries use the same four-stage profile: precharge, constant current, constant voltage, terminate on taper. Texas Instruments puts the CV point at 3.9–4.2 V for Li-ion against 3.5–3.65 V for LiFePO4, with precharge thresholds near 3.0 V and 2.0 V respectively (LiFePO4

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TINYCHARGER – SINGLE CELL LI-ION BATTERY CHARGER WITH MONITORING

Electronics News Updates / Muhammad Bilal

Two control loops, run in order A single-cell charger is a current source that becomes a voltage source. Below the float voltage it holds the programmed current and the cell voltage climbs; at the float voltage the loop switches to constant voltage and holds it, and current falls as the cell fills. The cycle ends

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ATTINY84 OSC CALIBRATOR AND HIGH VOLTAGE FUSE RESETTER

Electronics News Updates / Muhammad Bilal

A GitHub user called Wagiminator has posted details about ATtiny84-TinyCalibrator, which is an OSC Calibrator and High Voltage Fuse Resetter for 8-Pin ATtinys. The ATtiny84 was chosen as the microcontroller for the TinyCalibrator because it has exactly the necessary number of GPIO pins. 8-pin ATtinys usually feature few GPIO pins available, so they are usually operated without an external clock.

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ISOLATED, SINGLE-CHANNEL RS232 TRANSCEIVER (ISOLATED RS232 TO UART)

Electronics News Updates / Muhammad Bilal

Why isolate an RS-232 port An RS-232 cable is a long piece of wire that connects two pieces of equipment which are usually plugged into different sockets, sometimes in different buildings. The signal ground is shared, and with it every potential difference between the two supplies. In a lab that difference is millivolts. Next to

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STRAIN GAUGE SENSOR AMPLIFIER OR SINGLE SUPPLY INSTRUMENTATION AMPLIFIER

Electronics News Updates / Muhammad Bilal

What a bridge puts out, and how small it is A bridge is specified in millivolts per volt of excitation. TI’s guide puts load cells at 1 to 3 mV/V and works an example at 2 mV/V: 5 V of excitation gives 10 mV at full scale. Each output sits at half the excitation, so

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USB POWER TESTER BASED ON ATTINY45/85

Electronics News Updates / Muhammad Bilal

USB power testers provide users with the opportunity of examining how much power a device plugged into a USB port is drawing from the port. While this is mostly used by designers who are building USB-powered devices and are trying to evaluate how much power it consumes, it is sometimes also used to appraise the

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A DIY ELECTRONIC LOAD FOR DC-DC CONVERTER CHARACTERIZATION

Electronics News Updates / Muhammad Bilal

A project by reivax-boucoi: The heart of the system is an Atmel ATmega328P AVR microcontroller with 32kB of Flash and 2k of RAM running at a whopping 16MHz. It interfaces an I2C 12bit DAC (the MCP47FEB21A1) and the LTC2992 dual power monitor chip. The USB serial interface uses the MCP2221A bridge. The display is a classic 16×2 LCD. On the

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SELF-CALIBRATING USB VOLTAGE/CURRENT METER

Electronics News Updates / Muhammad Bilal

With a code size of 1KB on an ATtiny13A MCU, this tiny module measures voltages up to 22 volts and current up to 5 amps. There are a lot of so-called “USB doctor” modules which are used for monitoring currents flowing through a USB connection. They are used for cable or charger testing, quick charge

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