DOD FX75 Flanger Guitar Effect Pedal circuit diagram
– Specifications (1984): Input impedance = 500 k Ohms, Output impedance = 1 k Ohms; Gain = 0 dB; Delay Time = 0.5-6 ms; Signal-to-noise ratio = 90 dB
– Specifications (1986): same as above, plus Maximum Input Level = 4 V P-P, Bandwidth = 40 Hz-16 kHz (dry), 90 Hz-12 kHz (delay); Sweep Speed = 0.1-8 Hz
– Official schematic provided with pedal by DOD (dated 10/14/1984)
– Notable IC chips: MN3007 BBD chip driven by a MN3101 clock generator/driver CMOS chip; three TL022CP op amps (early versions) or one TL022CP and two 1458-type op amps (later versions)
– Internal trim pots: three; however, we do not recommend messing with trim pots
In the electrical sector, a schematic diagram is usually used to describe the design or model of equipment. Schematic diagrams are usually utilized for the maintenance and repair of electronic and electromechanical devices / units. Original schematics were made by hand, using standardized templates or pre-printed adhesive symbols, but nowadays Electrical CAD computer software is often used.
In electronic design automation, until the 1980s schematics were virtually the only formal representation for circuits. More lately, using the progress of computer system technology, other representations were introduced and specialized computer languages were developed, because with the explosive development of the complexity of electronic circuits, classic schematics are getting less practical. As an example, hardware description languages are indispensable for contemporary digital circuit design.