A switched capacitor voltage converter performs energy transfer and voltage conversion using capacitors. There are mainly two types of switched capacitor voltage converters, first is the voltage inverter circuit and the second is the voltage doubler circuit. These types of circuits are commonly known as charge pump circuits. In this project, we will design a switched capacitor voltage inverter using Texas Instruments LMC7660S IC, and […]
A buck converter (step-down converter) is a DC-to-DC switching converter that steps down voltage while maintaining a constant power balance. The main feature of a buck converter is efficiency, which means with a buck converter on board, we can expect extended battery life, reduced heat, smaller size, and improved efficiency. We previously made a few simple Buck converter
High Power High Efficiency Buck Converter Circuit using TL494 Read More »
In a previous article, I have shown you how you can build your own switched capacitor voltage converter circuit using the classic industry-standard LMC7660 IC. But oftentimes there are situations when you don’t have a specific IC available or the cost of an additional IC is ruining the harmony of your BOM. And this is where our beloved 555
You’re probably swimming in Bluetooth radio signals right now. But none of those are coming from the smallest, lowest-power end of the Internet of Things. These battery-powered and energy-harvesting millimeter-scale sensors are meant to last for years without needing replacement, but their radios can’t muster the energy needed to communicate using even the lowest energy
TEENY-TINY BLUETOOTH TRANSMITTER RUNS ON LESS THAN 1 MW Read More »
LTC7820 is, a high power fixed ratio charge pump DC/DC controller that eliminates the power inductor in a non-isolated intermediate bus converter, allowing up to a 50% reduction in circuit size and up to 4000 W/in³ power density. The 72V fixed-ratio DC/DC controller can deliver 500W. Non-isolated regulators and voltage level converters that employ energy
Linear applies switched-capacitor step-down topology for inductor-less DC/DC Read More »
MEMS Microphone Basics MEMS microphones are constructed with a MEMS (Micro-Electro-Mechanical System) component placed on a printed circuit board (PCB) and protected with a mechanical cover. A small hole is fabricated in the case to allow sound into the microphone and is either designated as top-ported if the hole is in the top cover or bottom-ported
COMPARING MEMS AND ELECTRET CONDENSER MICROPHONES Read More »
The MCP6V51 operational amplifier provides input offset voltage correction for very low offset and offset drift. This device provides a gain bandwidth product of 2 MHz, is unity gain stable, has no 1/f noise, and provides superior CMRR and PSRR performance. These products operate with a single supply voltage from 4.5V to 45V, with a
The XCL206 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package (2.5mm×2.0mm, H=1.0mm). A stable power supply with an output current of 600mA is configured using only two capacitors connected externally. Operating voltage range is from 2.0V to 6.0V(XCL20xG:1.8V-6.0V). Output voltage is internally set in a
ULTRA SMALL DC-DC CONVERTER WITH INTEGRATED INDUCTOR Read More »
The microcontroller PIC16F887 has a build in USART (Universal Synchronous/Asynchronous Receiver/Transmitter) module. This module can be used as UASAT or UART. This small post shows an example for the usage of the UART protocol with PIC16F887 microcontroller. Hardware Required: PIC16F887 microcontroller MAX232 — datasheet 4 x 10uF polarized capacitor Female COM port Breadboard 5V
UART Example for PIC16F887 microcontroller using CCS PIC C compiler Read More »
Interfacing PIC16F887 with FAT16 SD card After reading raw data (bytes and sectors) from SD card, now I’m going to use FAT16 file system to read and print text file located in 2 GB SD card. Read SD card raw data topic: MMC/SD Card raw data read with PIC16F887 microcontroller UART protocol is used to
Read text files from FAT16 SD card with PIC16F887 Read More »
