Microphone Preamplifier Circuit

Mixer Circuit

Clipping Monitor

Tone Volume Balance

Power Amplifiers

Power Supply
The appearance account of this arrangement are:
* Six absolute microphone amplifiers with up to 60dB accretion (theoretical, not tested). Each approach has an absolute fader and an attenuator to acquiesce affiliation of agreeable instruments which accept line-level outputs (such as synthesizers).
* Mixer to amalgamate all the six [...]

Power Amplifier Circuit with 2n3055
Simple and low cost. The optimal accumulation voltage is about 50V, but this amp assignment from 30 to 60V. The acute ascribe voltage is about 0.8 – 1V. As you can see, in this architecture the apparatus accept a big tolerance, so you can body it about of the components, which [...]

Figure 1. Substituting the diode-capacitor network shown for an inductor allows this switching-regulator IC to deliver 2mA at comparable line and load regulation, with somewhat reduced efficiency.

Figure 2. Introducing a MOS driver (IC2) enables the Figure 1 circuit to deliver as much as 20mA.
In conventional applications, switching-regulator ICs regulate VOUT by controlling the current through [...]