Figure 2: When the Figure 1 circuit detects an IR signal, it powers and resets the microcontroller. After the IR transmission ends, the microcontroller suspends itself by releasing the Hold line.

Click to Enlarge Image Figure 2. This is the analog portion of the block diagram in Figure 1. The amplifiers and voltage reference tie into the ADC, and the ADC ties to the microcontroller. Building a ...

This circuit solved a problem encountered in developing a portable device with an ARM Cortex-M0 processor. The power supply consisted of two AA batteries (2 × 1.5 V), and I needed to signal the ...

The new Stepping A4 of the RP2350 microcontroller introduced a year ago corrects some errors. The Raspi makers invite you to hack again.

Learn how to improve your performance, reliability, and efficiency in designing microcontroller-based circuits for real-time feedback. Discover tips on hardware, software, communication, and testing.

The audio component centers around the SS8550 PNP transistor (Q1) which serves as a driver for the passive buzzer (BZ1). This ...

Most of you know how an NFC tag works. The reader creates an RF field that has enough energy to power the electronics in the tag; when the tag wakes up, two-way communication ensues. We’re ...

This microcontroller-based control circuit adjusts the speed of a small permanent-magnet DC motor to one of four speeds as selected by a pair of photosensors.