A real challenge for the board
 

well i think this is a challenge, just a little background on me, i am finishing my Junior year at Uconn as an Electrical Engineer, and i am looking for a little design help... so bless your souls if you can help me out...
now what i think i am trying to build is something called a chirp circuit, it supposedly implements a 556 but i looked them up and dont see how it does what i want. What i need is a device that outputs a slowly increasing frequency. My professor claims a 556 and some RC relationships do this, but i was wondering if anyone on this board possibly knew anything about this topic and could give me a little more information.
post ?s if you have them so i can respond
Mods if this isnt the right place please let me know so i can repost.

Tilted Electronics?

Tastes like chicken,smells like chicken,looks like chicken,sounds like chicken, feels like chicken.. it must be chicken.

I have access to an older, but still useful database of electronic circuits that have appeared in periodicals.

I can search by device, so I ran a search and here are some of the results for "556" that look like they might make sounds.

These articles can then be requested through your library inter-library loan system, and can usually be faxed/scanned to your library from libraries that have that issue.

I hope this helps a bit.


Title: TIMER IC CIRCUIT SEPARATES REP RATE AND DUTY CYCLE CONTROL


Author: SANCHOLUZ,A.

Affil: LABORATORIO NACIONAL DE HIDRAULICA, CARACAS, VENEZUELA


Mag: ELECTRONICS

Date: 771110 Vol: 50 No: 23 Page: 105 Article length: 1

CCT(s): DUAL TIMER IC CCT ALLOWING INDEPENDENT CONTROL OF FREQUENCY & DUTY
CYCLE

Devices: 556/531/

# of Circuits: 1 # of Devices: 1 Index of Complexity (0-100): 1
Analog/Digital: A PCB: No Program: Remarks:
Extra Keywords: MONOSTABLE MULTIVIBRATOR/OA./BUFFER

-------------------------


Title: "TUG-OF-WAR"


Author: FROSTHOLM,R.C.

Affil:


Mag: POPULAR ELECTRONICS

Date: 750200 Vol: 7 No: 2 Page: 43 Article length: 5

CCT(s): PLAYER CCTS OF ELECTRONIC GAME TO CHALLENGE REFLEXES/CCT INCLUDING
CLOCK OSCILLATOR/SOUND-OUTPUT CCT (2 GATED TONE-BURST GENERATORS)

Devices: 556A/553B/7400/8251B/74192/8241A/LM309DB/MV5253/MV5053/1N914

# of Circuits: 4 # of Devices: 5 Index of Complexity (0-100): 25
Analog/Digital: DA PCB: Yes Program: No Remarks:
Extra Keywords: UP-DOWN COUNTER/PS./LED.S/1-SHOT/BCD.-TO-DECIMAL

-----------------------------


Title: SOME ALARMING TECHNIQUES


Author: WILLIS,J.

Affil: WA4CCA, 18456 OVERLOOK RD., LOS GATOS, CA 95030


Mag: 73 AMATEUR RADIO

Date: 840100 Vol: 0 No: 280 Page: 32 Article length: 3

CCT(s): ALARM CONTROL PANEL WITH ENTRY-EXIT DELAY SUITABLE FOR RESIDENTIAL
USE

Devices: 1N4001/7805/556/7400/

# of Circuits: 2 # of Devices: 3 Index of Complexity (0-100): 7
Analog/Digital: DA PCB: Program: Remarks:
Extra Keywords: BURGLAR-PROOF/CLOSED-LOOP/OPEN-LOOP

-----------------------------


Title: VERSATILE WAVEFORM GENERATOR FOR TESTING NEUROELECTRIC SIGNAL PROCE
SSORS, A

Author: KOHN,A.F.

Affil: ESCOLA POLITECNICA, D.E.E., UNIVERSIDADE DE SAO PAULO, LABORATORIO
DE ENGENHARIA BIOMEDICA, CX. POSTAL 61548, CEP 05508, SAO PAULO, SP=

Mag: JOURNAL OF NEUROSCIENCE METHODS

Date: 890800 Vol: 29 No: 2 Page: 157 Article length: 7

CCT(s): 1 CHANNEL OF MULT-CHANNEL WAVEFORM GENERATOR TO TEST NEUROELECTRIC
SIGNAL PROCESSING SYSTEMS, USING IC SWITCHED CAPACITOR FILTER

Devices: MF10A/LM556/LM555/TL074/74LS221/74LS74/CD4040/74LS08/74LS04/

# of Circuits: 1 # of Devices: 9 Index of Complexity (0-100): 11
Analog/Digital: AD PCB: No Program: No Remarks:
Extra Keywords: DURATION, WAVESHAPE, LATENCY, AMPLITUDE & SNR.

--------------------------


Title: WORLD'S FIRST 16-BIT CMOS MICROPROCESSOR, THE EXPERIMENTING WITH A
PIEZOELECTRIC SPEAKER [1ST/CMOS./UP.]

Author: MIMS,F.M.,III

Affil:


Mag: COMPUTERS & ELECTRONICS

Date: 831200 Vol: 21 No: 12 Page: 86 Article length: 8

CCT(s): SPEAKER DRIVER CCT OF MULTI-OUTPUT ALARM/SONIC-ULTRASONIC SIREN CCT
USING COMPLEX SOUND GENERATOR & PIEZOELECTRIC TWEETER

Devices: 556/SN76488/

# of Circuits: 2 # of Devices: 1 Index of Complexity (0-100): 2
Analog/Digital: AD PCB: No Program: No Remarks:
Extra Keywords: VOLUME/SWEPT-FREQUENCY, UP-DOWN OSCILLATOR/TONE

---------------------------------


Title: ELECTRONIC DOORBELL


Author: ELAM,A.

Affil:


Mag: ELECTRONICS TODAY INTERNATIONAL

Date: 830400 Vol: 7 No: 4 Page: 21 Article length: 2

CCT(s): ELECTRONIC DOORBELL THAT EMITS GENTLE WARBLING


Devices: NE556/BC239C/MPS6515/

# of Circuits: 1 # of Devices: 3 Index of Complexity (0-100): 4
Analog/Digital: A PCB: Yes Program: Remarks:
Extra Keywords: VISITORS

-----------------------------


Title: BURGLAR-ALARM CIRCUIT USES ONE CHIP [1]


Author: BARTYS,J.

Affil: ALPHA, MARCO ELECTRONICS DIV., KRAKOW, POLAND


Mag: EDN

Date: 850516 Vol: 30 No: 11 Page: 230 Article length: 2

CCT(s): SINGLE-CHIP BURGLAR-ALARM CCT THAT USES DUAL TIMER, DRAWS 10MA OF S
TANDBY CURRENT & GENERATES PULSING ALARM SIGNAL TO CONSERVE ENERGY

Devices: 556/

# of Circuits: 1 # of Devices: 1 Index of Complexity (0-100): 1
Analog/Digital: AD PCB: No Program: No Remarks:
Extra Keywords: BATTERY/CAR DOOR/LIGHTING CCT/SENSORS/OPEN/CLOSED


----------------------------


Title: BUG-OFF: THE POPULAR ELECTRONICS(R) PEST REPELLER


Author: YACONO,J.

Affil:


Mag: POPULAR ELECTRONICS

Date: 910400 Vol: 8 No: 4 Page: 36 Article length: 4

CCT(s): PORTABLE ELECTRONIC PEST REPELLER USING DUAL-TIMER CHIP AS SWEEP-FR
EQUENCY OSCILLATOR INCLUDING OSCILLATOR WITH 50% DUTY CYCLE, & VCO.

Devices: 556/1N4001/

# of Circuits: 1 # of Devices: 1 Index of Complexity (0-100): 1
Analog/Digital: AD PCB: No Program: No Remarks:
Extra Keywords: ASTABLE MULTIVIBRATOR/FET./ULTRASONIC/INSECTS


-----------------


Title: TWO-TONE ELECTRONIC DOORBELL [2]


Author: SHOEMAKER,C.

Affil:


Mag: MODERN ELECTRONICS

Date: 890200 Vol: 6 No: 2 Page: 46 Article length: 5

CCT(s): 2-TONE ELECTRONIC DOORBELL THAT SOUNDS DIFFERENT AUDIO TONES WHEN F
RONT & BACK (REAR) DOORBELL BUTTONS ARE PRESSED, USING DUAL TIMER

Devices: LM556/

# of Circuits: 1 # of Devices: 2 Index of Complexity (0-100): 2
Analog/Digital: A PCB: Yes Program: No Remarks:
Extra Keywords: LED./OSCILLATOR/ASTABLE MULTIVIBRATOR/935HZ/190HZ

-------------------


Title: SUPER SIREN ALARM


Author: KRAENGEL,W.D.JR.

Affil:


Mag: RADIO-ELECTRONICS

Date: 820400 Vol: 53 No: 4 Page: 44 Article length: 2

CCT(s): POWERFUL SIREN ALARM CCT THAT PRODUCES VARIETY OF DISTINCTIVE ATTEN
TION-GETTING SOUNDS & PROVIDES 10W OF OUTPUT TO SPEAKER

Devices: 556/TIP33/1N4001/

# of Circuits: 1 # of Devices: 2 Index of Complexity (0-100): 2
Analog/Digital: AD PCB: No Program: No Remarks:
Extra Keywords: LF. ASTABLE MULTIVIBRATOR (LFM)/TRIGGERED/AF.











Below here pasted in results.......