Create A Low-cost- High-accuracy Lcr Meter With An Stm32 Mcu !!hot!! Site

Use the STM32 DAC with DMA and a 256-point lookup table. No external DDS needed.

: Use a high-quality op-amp with low input bias current (e.g., Go to product viewer dialog for this item. Create A Low-Cost- High-Accuracy LCR Meter With An STM32 MCU

Use two alligator clips or a ZIF (Zero Insertion Force) socket. Keep traces short. Parasitic capacitance of 1pF on your pcb traces will ruin your 100pF measurements. Use the STM32 DAC with DMA and a 256-point lookup table

But what if you could build one with for the cost of a pizza? Create A Low-Cost- High-Accuracy LCR Meter With An STM32 MCU

Use a CMOS analog switch (74HC4066 or CD4051) to select one of four reference resistors based on measured |Z|.