Showing posts with label metronome. Show all posts
Showing posts with label metronome. Show all posts
Monday, September 30, 2013
Mini Metronome
Linear scale-Small size 40 to 208 beats per minute
Mini Metronome Circuit diagram:
Notes:
- Q1 & Q2 provide linear frequency operation of IC1 following P1 resistance variation.
- Q3 was added in order to obtain a louder click, similar to clockwork metronomes.
- 12V micro battery was used to obtain more output power and more compactness.
- Rotate P1 fully towards R2, then set R1 to obtain 40 beats per minute (compare with another metronome).
- Rotate P1 fully towards R3, then set R4 to obtain 208 beats per minute.
- Finally mark the entire scale with the usual metronome steps as following:
- 40 - 42 - 44 - 46 - 48 - 50 - 52 - 54 - 58 - 60 - 63 - 66 - 69 - 72 - 76 - 80 - 84 - 88 - 92 - 96 - 100 - 104 - 108 - 112 - 116 - 120 - 126 - 132 - 138 - 144 - 152 - 160 - 168 - 176 - 184 - 192 - 200 - 208.
Parts:
P1______100K Linear Potentiometer
R1_______10K 1/2W Trimmer Cermet
R2_______10K 1/4W Resistor
R3______330K 1/4W Resistor
R4_______50K 1/2W Trimmer Cermet
R5______100K 1/4W Resistor
R6,R7_____1K 1/4W Resistor
C1________1µF 63V Polyester Capacitor
C2_______10nF 63V Polyester Capacitor
C3_______47µF 25V Electrolytic Capacitor
IC1_____NE555 General purpose timer IC
Q1,Q2___BC560 45V 100mA Low noise High gain PNP Transistors
Q3_____ZTX753 100V 2A PNP Transistor
SW1______SPST Switch (Ganged with P1)
SPK______8 Ohm 40mm. Loudspeaker
B1_____12V Battery (MN21, GP23A or VR22 type)
Tuesday, September 24, 2013
Metronome Generator Circuit using NE555
Here is a simple circuit with NE555 IC that can be used to generate metronomes.Such circuit is very useful for those who learn music. The circuit is simply an astable multivibrator NE555 cable around. The components R1, R2 and C1 determine the frequencyNotes.
- The circuit can be wired on a general purpose PCB or common board.
- The circuit can be powered from a 9V PP3 battery.
- The POT R1 can be used to adjust the rhythm of the sound.
- The POT R2 can be used as volume control.
- The speaker k1 can be a n 8 Ohm tweeter.
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