Apple dedicated storage USB flash drive reference design

Schematic PCB

ERASynthMicro: USB powered, portable, open source, RF signal generator, supports 12.5MHz - 6.4GHz

It can be powered via a USB port and has an LCD interface for standalone use without a PC. ERASynth Micro uses a dual-loop PLL architecture to provide fast frequency switching and fine tuning resolution. Frequency, amplitude and pulse modulation capabilities are also available.

Schematic PCB

Reverse Engineering and Repair of LeCroy High Frequency Active Probe HFP2500

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Magnetic levitation system based on STM32F407

Support revolution, fixed height, side floating

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170 W AC-DC reference design with input voltage range for e-bike and power tool battery chargers

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Quadrant: Gesture audio adjustment based on 4 TOF sensors

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A low-profile version of full-featured software radio based on Raspberry Pi Pico (fully open source + detailed explanation)

With just a Raspberry Pi Pico, an analog switch and an op amp, you can build a powerful SDR receiver covering the LW, MW and SW bands. Capable of receiving signals from halfway around the world.

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DI-163 - Wide-range set-top box power supply with latch-off overvoltage (OVP) shutdown protection

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RDR-839 - 12 W power supply for devices using TinySwitch-4

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DER-881 - 14.5 W Dual Output Isolated Flyback Power Supply Using TinySwitch-4

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DER-243 - 65W adapter

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DER-566 - 70 W Universal Input Non-PFC Flyback Charger Power Supply

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DER-580 - 118 W High Line Input Non-PFC CV/CC Flyback Charger Power Supply

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DER-583 - 106 W High Line Input Non-PFC CV/CC Flyback Charger Power Supply

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RDR-706 - 26.5 W dual output isolated flyback power supply for devices using TOPSwitch-JX

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DER-218 - 100 W cooling power supply

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DER-217 - 22 W (48.6 W peak) 3-output power supply

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DER-417 - <5 mW no-load input power, 8 W backup power

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RDR-962 - 12 W non-isolated dual output device power supply using LinkSwitch-XT2SR

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DER-963 - 5 W non-isolated flyback small appliance power supply using LinkSwitch-XT2SR

Schematic PCB