The circuit has been designed to simulate a canary “Harzer Roller”. It consists of six timer ICs NE555.
Schematic
Please see attached files.
Theory of Operation
When powering up the circuit IC4 (a nonretriggerable monostable oscillator) is triggered by the low output of IC1, thus activating IC5, which – together with IC6 generates a winding up frequency (similar to a siren). P1 controls frequency of IC5 (approx. 20Hz) and P2 controls the frequency of IC6 (approx 1.5KHz), which is modulated by IC5 output into the “CV” input of IC6.
When S1 (TRIGGER) is pushed IC1 becomes active (output H) which in turn switches on IC2, which is an astable oscillator working at about 20Hz. The output of IC2 activates IC3, another astable oscillator working at about 2 KHz, causing a timed (10seconds) tone burst.
When IC1 times out it triggers IC4 which then generates the winding up tone as described when powering up the circuit.
A speaker of 8 to 32 Ohm impedance might be connected to the output. If loudness is too low JP1 might be set for higher volume.
Since the sound generated has no sinusoidal wave shape the sound is considerably ugly – that’s why the circuit’s name is CANARIA FURIOSO.
Parts List
Qty Value Package Library Parts
1 1K R-10 DISCRETE R4
2 1N4001 D-10 DISCRETE D2, D3
1 1N4148 DO35-7A DIODE D1
4 1µ/16 ES-2,5-6 DISCRETE C2, C9, C11, C20
4 2,5-SHORT 2,5-L PADS +12V, GND, SP+, SP-
1 3M3 R-10 DISCRETE R7
2 4K7 R-10 DISCRETE R6, R10
1 5K PT-05 DISCRETE P2
1 6M8 R-10 DISCRETE R1
1 8R PC-SPKR BUZZER SPK1
1 10K RV-2,5 DISCRETE R9
5 10n MKS-02 DISCRETE C3, C5, C7, C10, C12
2 10n MKS2-5 DISCRETE C6, C8
1 15K R-10 DISCRETE R2
1 18K R-10 DISCRETE R8
1 27K R-10 DISCRETE R5
1 47K PT-05 DISCRETE P1
1 100R R-10 DISCRETE R11
1 100n MKS-02 DISCRETE C4
7 100n MKS2-5 DISCRETE C13, C14, C15, C16, C17, C18, C19
1 100µ/16 ES-3,5/8 DISCRETE C1
1 390K R-10 DISCRETE R3
1 JP-2 JP-2 JUMPER JP1
6 NE555 DIL-08 NE555 IC1, IC2, IC3, IC4, IC5, IC6
1 TRIGGER TA5 SWITCH S1
Parts list generated from eagle.
Schematic
Please see attached files.
Theory of Operation
When powering up the circuit IC4 (a nonretriggerable monostable oscillator) is triggered by the low output of IC1, thus activating IC5, which – together with IC6 generates a winding up frequency (similar to a siren). P1 controls frequency of IC5 (approx. 20Hz) and P2 controls the frequency of IC6 (approx 1.5KHz), which is modulated by IC5 output into the “CV” input of IC6.
When S1 (TRIGGER) is pushed IC1 becomes active (output H) which in turn switches on IC2, which is an astable oscillator working at about 20Hz. The output of IC2 activates IC3, another astable oscillator working at about 2 KHz, causing a timed (10seconds) tone burst.
When IC1 times out it triggers IC4 which then generates the winding up tone as described when powering up the circuit.
A speaker of 8 to 32 Ohm impedance might be connected to the output. If loudness is too low JP1 might be set for higher volume.
Since the sound generated has no sinusoidal wave shape the sound is considerably ugly – that’s why the circuit’s name is CANARIA FURIOSO.
Parts List
Qty Value Package Library Parts
1 1K R-10 DISCRETE R4
2 1N4001 D-10 DISCRETE D2, D3
1 1N4148 DO35-7A DIODE D1
4 1µ/16 ES-2,5-6 DISCRETE C2, C9, C11, C20
4 2,5-SHORT 2,5-L PADS +12V, GND, SP+, SP-
1 3M3 R-10 DISCRETE R7
2 4K7 R-10 DISCRETE R6, R10
1 5K PT-05 DISCRETE P2
1 6M8 R-10 DISCRETE R1
1 8R PC-SPKR BUZZER SPK1
1 10K RV-2,5 DISCRETE R9
5 10n MKS-02 DISCRETE C3, C5, C7, C10, C12
2 10n MKS2-5 DISCRETE C6, C8
1 15K R-10 DISCRETE R2
1 18K R-10 DISCRETE R8
1 27K R-10 DISCRETE R5
1 47K PT-05 DISCRETE P1
1 100R R-10 DISCRETE R11
1 100n MKS-02 DISCRETE C4
7 100n MKS2-5 DISCRETE C13, C14, C15, C16, C17, C18, C19
1 100µ/16 ES-3,5/8 DISCRETE C1
1 390K R-10 DISCRETE R3
1 JP-2 JP-2 JUMPER JP1
6 NE555 DIL-08 NE555 IC1, IC2, IC3, IC4, IC5, IC6
1 TRIGGER TA5 SWITCH S1
Parts list generated from eagle.
