NEC Computer Engineering case studies
NEC Computer Engineering · Put your knowledge to work in context.
The Nepal Engineering Council (NEC) is the statutory regulator for the engineering profession in Nepal, described in its own materials as "an autonomous government body formed on 11 March 1999 under The Nepal Engineering Council Act." Its mandate is to mobilise the engineering profession in a systematic and scientific manner and to register engineers according to their qualifications. For a computer engineering graduate, the relevant pathway is the Professional Engineer (PE) registration stream that appears in the Council's main navigation alongside General Registration, Foreign Engineer Recognition and Accreditation. The NEC Computer Engineering case studies are 5 cases and about 5,513 words.
1SPI Clock Doubling That Passed on the Bench and Failed in the Field
A pressure-sensor node uses an MCU as SPI master in mode 0 (CPOL=0, CPHA=0) to read a 16-bit sensor. The release firmware ran SCLK at 24 MHz.
1,049 words, about 5 min2Unbounded Blocking in a Motor-Drive RTOS Because the Mutex Is a Binary Semaphore
An induction-motor drive runs FreeRTOS on a Cortex-M4 at 168 MHz. Three tasks touch shared resources: Control - priority 5, period 1 ms, worst-case execution 150 µs, hard deadline equal to its period.
996 words, about 5 min3Cache-Coherent DMA on a Cortex-M7 Power Analyser
A three-phase power analyser uses an STM32H7 (Cortex-M7) with the D-cache enabled, 32-byte cache lines, write-back write-allocate policy. Two 16-bit ADC channels are sampled at 48 kS/s each through DMA1 into a circular buffer of 512 samples per channel (2 KB total) placed in AXI SRAM at 0x2400 0000.
1,176 words, about 6 min4A VFD Interferer That Aliases Straight Into the Measurement Band
A condition-monitoring card samples a piezoelectric accelerometer with a 3.3 V, 12-bit SAR ADC (1 MS/s capable) at fs = 8 kS/s. The signal of interest is 20 Hz to 2 kHz.
1,208 words, about 6 min512 V to 3.3 V with a Burst Load: Is a Bigger LDO Enough?
An industrial control board runs from a 12 V rail and needs 3.3 V for a Wi-Fi module plus an MCU. The workload is bursty: 400 mA average, with 700 mA bursts lasting 60 ms every 2 s during association and transmit, plus 40 mA for the MCU.
1,084 words, about 5 min