Circuits & Schematics - Microcontrollers Usage - 6

Jeff Magee It is emphasised that this should not be used for medical purposes. Displays your pulse rate, blood oxygen level and a moving graph of each heart beat, the photoplethysmogram (PPG). About this project This project implemented on an ...

This module is an isolated full-duplex differential line driver and receiver for TIA/EIA RS485/RS422 applications (Figure 1). The module is ideal for long transmission lines because the ground loop is broken to allow for a much larger common-mode ...

Tirdad Sadri Nejad Hackster.io With a code size of 1 KB 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 ...

Inexpensive, 16-bit, monolithic DACs can serve almost all applications. However, some applications require unconventional approaches. This Design Idea design concerns circuitry I recently designed for a tunable-diode laser spectrometer for a ...

Many devices require programming through a serial bus, such as I 2 C. The programming can be done during final test, after the circuit board has been assembled. In many cases, the pins used for programming can then be utilized for something else ...

Soumitra Bhattacharjee EDN In PIC microcontrollers, the MSSP (master synchronous serial port) module uses multiplexed pins for the I 2 C and SPI peripherals. There is typically no issue using either of the two peripherals. But what if both ...

The circuit that's shown in Figure 1 implements a programmable 0- to 20-mA precision current source. The REF192 low-headroom 2.5-V voltage reference (U1) can source up to 30 mA. An AD5280 digital potentiometer (U2) controls the voltage-divider ...

David Conrad Electronic Design In this Idea for Design, placing this circuit setup between the battery V DD bus and the PIC microcontroller allows you to execute in-circuit programming while protecting the application circuit. Many PIC processors ...

Batteries are the typical power sources for portable-system applications, and it is not unusual these days to find microcontroller-based portable systems. A variety of microcontrollers operates at low power-supply voltages, such as 1.8 V. Thus you ...

The enduring simplicity of PWM DACs will always earn them a place in the designer’s cookbook, but slow response time and the problem of PWM ripple tend to limit their appeal and utility. The usual way of attenuating PWM ripple, an RC low pass ...