![]() Thus, DAVS 13 provides an output of click amplitude at three levels, i.e., Loud, Medium, and Soft. Transistor Q3 and resistor R12 operate in the same way as Q2 and R13 except that they produce an even lower voltage level. The capacitor then charges to a lower voltage which produces smaller amplitude acoustic clicks. ![]() If transistor Q2 is turned on by the control logic, the resistor R13 will be switched in to shunt the capacitor C9 and form a voltage divider between resistors R9 and R13. This charge is then available for discharge through the loudspeaker 32, which produces the maximum amplitude acoustic click (the "accented" click). If neither Q2 or Q3 is turned on, the capacitor C4 will charge to the full 30 volts. The 30 volt power is applied through R9 to charge the capacitor C4. The transistors Q2 and Q3 are connected in common emitter configuration in parallel with the capacitor C4. The inverters U2C and U2D provide impedance translation between the microcontroller output and the input terminals (bases) of the transistors Q2 and Q3. DAVS 13 is comprised of resistors R9 to R13, capacitor C4, transistors Q2 and Q3, and inverters U2C and U2D. The digital adjustable voltage source (DAVS) 13 provides the audible click of the metronome to the headphones 30 or loudspeaker 32. The microcontroller for the metronome unit can be programmed with any combination of time signatures, rhythms, or patterns with desired cues or accents. The metronome unit includes a display for menu selection, prompts, and visual cues for adjustment of the tempo and selection of types of clicks in a beat pattern. Headphones, an audio speaker, and/or an LED indicator can be used to provide audible and visual cues of the tempo to the user. A digital pulse voltage source and acoustic pulse switch are responsive to control logic to produce different amplitudes and tones for three types of clicks, i.e., Loud, Medium, and Soft, in order to provide distinctly different audible click patterns. The user operates a footswitch to increase the tempo automatically in continuous increments and to hold a desired tempo. A microcontroller is pre-programmed with a metronome click pattern in any selected note duration value. G04F5/00- Apparatus for producing preselected time intervals for use as timing standardsĪn electronically programmable metronome has a footswitch for allowing a user to adjust the tempo over a continuous range without taking hands off an instrument or interrupting playing.G09B- EDUCATIONAL OR DEMONSTRATION APPLIANCES APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE MODELS PLANETARIA GLOBES MAPS DIAGRAMS.G09- EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS.Priority to US08/052,624 priority Critical patent/US5447089A/en Application granted granted Critical Publication of US5447089A publication Critical patent/US5447089A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Marrash James G. Priority date (The priority date is an assumption and is not a legal conclusion. Marrash Original Assignee Marrash James G. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US08/052,624 Inventor James G. ![]() Google Patents Electronic metronome with variable tempo controlÄownload PDF Info Publication number US5447089A US5447089A US08/052,624 US5262493A US5447089A US 5447089 A US5447089 A US 5447089A US 5262493 A US5262493 A US 5262493A US 5447089 A US5447089 A US 5447089A Authority US United States Prior art keywords metronome microcontroller tempo click switch Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5447089A - Electronic metronome with variable tempo control ![]() US5447089A - Electronic metronome with variable tempo control ![]()
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