A high qualitiy voltage regulation must be built using high quality parts. It is however no longer necessary to use discret semiconductors as there are now very good integrated voltage regulator ciurcuits available. I chose the adjustable regulators LT1085 (positive) and LT1033 (negative) which are compatible to LM317/LM337. The standard fixed voltage regulators of the [...]
Use this circuit as a low cost alternative to a commercial DAC. It is important that the latch be a CMOS device, so that the outputs drive to Vcc when they are high. (TTL devices only drive to 2.4 volts or so). I have shown the ‘573 latch rather than the ‘373 which can also [...]
If your stereo amplifier does not have an input for a record player, you should use this circuit between your turntable and your amplifier. The output of your turntable follows a gain-bandwidth curve called the RIAA compensation curve. The standard AUX input on your stereo does not. Records will sound very strange without an RIAA [...]
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