Boat Anchor Audio is offering two audio filters designed for the DIY audiophile or experimenter and, in addition, a driver for very large LED displays.
The first of these is our 10-band single channel bandpass audio filter PCB. This filter is strictly analog in design and is based on the reliable TL074 op amp. More info here.
Our second PCB is a Universal Audio Filter also based on the TL074 chip and allows a low-pass filter, high-pass filter and band-pass filter using one chip. Both Q, gain and frequency are adjustable. More info here.
Very large LED displays often have the LEDs wired in series to keep the LED currents reasonable (higher voltage = lower current). Our final PCB controls the higher voltages needed for series wired LEDs in an 8x8 matrix or 7-segment display. More info here.
All boards come fully assembled, tested and ready for use.