Circuit

• Bessel 12dB Highpass
• Bessel 12dB Lowpass
• Bessel 18dB Highpass
• Bessel 18dB Lowpass
• Bessel 24dB Highpass
• Bessel 24dB Lowpass
• Butterworth 12dB Highpass
• Butterworth 12dB Lowpass
• Butterworth 18dB Highpass
• Butterworth 18dB Lowpass
• Butterworth 24dB Highpass
• Butterworth 24dB Lowpass
• Butterworth 6dB Highpass
• Butterworth 6dB Lowpass
• C64 to RS232 Interface
• CD32 Keyboard to Serial Interface 1
• CD32 Keyboard to Serial Interface 2
• Linkwitz 24dB Highpass
• Linkwitz 24dB Lowpass
• Operation Amplifier: Addition
• Operation Amplifier: Inverting Amplifier
• Operation Amplifier: Non-inverting Amplifier
• S/PDIF input
• S/PDIF optical
• S/PDIF output
• TV Antenna Ground Isolator - Eliminate Ground Loops

Need help with the circuits? See the tutorial.

Filters

Active Filters

Bessel

• Highpass: 12dB, 18dB, 24dB
• Lowpass: 12dB, 18dB, 24dB

Butterworth

• Highpass: 6dB, 12dB, 18dB, 24dB
• Lowpass: 6dB, 12dB, 18dB, 24dB

Linkwitz

• Highpass: 24dB
• Lowpass: 24dB

Misc

Operation Amplifier

• Addition
• Inverting Amplifier
• Non-inverting Amplifier

Serial

• C64 to RS232 Interface
• CD32 Keyboard to Serial Interface 1
• CD32 Keyboard to Serial Interface 2

TV

• TV Antenna Ground Isolator - Eliminate Ground Loops