Posted on Thursday, April 8, 2010 • Category: Audio DAC
This is a simple USB Audio DAC based on PCM2902 chip from Texas Instruments. The power is drawn directly from USB port. Circuit includes DAC and ADC, SPDIF outputs, input and HID part with 3 buttons for MUTE, VOL+ and VOL-.
Build Accurate LC Meter and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging and reset function to make sure the readings are as accurate as possible ... [more]
