Notch Filter Development Board

The Notch Filter Development Board is an active T-filter using OP AMPS with pin-outs of the TL074. The circuit uses feedback and is designed for audio frequencies. Two pots are provided to fine-tune the notch depth.

Audio Filter Development Board

The Audio Filter Development Board is to aid in the development of audio filters using TL074 pin-outs.

With this board, low pass, high pass and bandpass audio filters may be designed. The frequency controlling components are easily changed without the need for any tools thus allowing the effects of various component values to be observed.

An uncommitted amp on the IC may be used as a buffer or amplifier if desired.

The design is based on the state variable filter.

Audio OP AMP Development Board

The Audio OP AMP Development Board is to aid in the development of audio circuits using OP AMP with the pin-outs of the TL074.

With this board, inverted and non-inverted OP AMP audio circuits may be development. Numerous circuit configurations may be implemented, such as:

Using all amps simultaneously, inverted, non-inverted or mixed

Using amps cascaded (feeding the output f one amp into another amp)

Components are easily changed without the need for any tools thus allowing the effects of various component values to be observed.

All our boards are fitted with a rail splitter providing dual polarity power to the ICs. This provides for the use of a single polarity power source.

The boards are shown with a ON-OFF switch, which is an option.