Sound Generator Kits & Sirens

Southern China is now the major centre for making chip-on-board (COB) electronics. And DIY Electronics is the only supplier that we know of that is supplying these items to the public in general & the hobbyist in particular. We have put together a range of these items. If you are interested to buy these or similar items in bulk then please email us with your requirements.

COB means that the very small die form of the IC is bonded directly onto a PCB and the copper tracks come out from it. A blob of black epoxy covers & protects it. The benefit is a saving in space. We are buying these COB's on larger than usual PCB 16mm x 29mm, so that the student can solder the external components to it with a minimum amount of difficulty. They were reviewed in Electronics Australia, April, 1995, p72.

SG1 through 14 are COB Kits which give a sound of some sort. An 'M' suffix denotes that the Kit comes with a mother-board to support the COB PCB and components. You can view a scan of the motherboards below.




Price: $9.99USD

 

SG1M - Three Train Sounds Whistle-blowing, chugging, level crossing bell and clackety clack of train crossing bridge. Just 4 switches and 4 components to add. COB PCB: 16mm x 29mm. Mother board supplied to fit COB PCB & components into.

SG1M Documentation

Back to top


Price: $12.25USD

Imitates real phone tones, engaged and ringing sounds, two door chimes. COB PCB: 16mm x 29mm. Mother board supplied to fit COB PCB & components into.

Scan of motherboard

Back to top

 

Price: $9.99USD

Sixteen door chime tunes. Tunes cycle through the sixteen tunes with each keypress. LED fluctuates according to the sound level. Designed for high quality melody products. Supplied with motherboard.

Scan of motherboard

Back to top

 

Price: $9.99USD

The classic noises little children love! Three sirens- ambulance, police and fire engines-plus a machine gun. All with 2 flashing LEDs. COB PCB 16mm x 29mm with motherboard.

Back to top

 

Price: $9.99USD

The classic door chime ding dong. Adjust the component values in the two RC networks to get exactly the tones you want. 3V low stand-by current. COB PCB 16mm x 29mm

Back to top

 

Price: $8.99USD

Melody IC in TO-92 package. Just connect 3V and speaker. Tune repeats continuously while power is connected. Total of 128 notes. Cmos LSI. For Alice tune.

SG6 PDF documentation

Back to top

 

Price: $8.99USD

Complete Card Melody Unit- "Love Story" Melody IC COB, battery and piezo all ready to play. As found in Christmas cards and books which play when you open the page. Self-adhesive backing. Tune repeats continuously while power is connected. Total of 128 notes. Cmos LSI. Two supplied per kit.

Close up view

Back to top

 

Price: $9.99USD

SG10M 4 animal sounds. Same motherboard/COB as SG1M, just the sounds are different.

Hen, cat, cow and dog sounds. Just 4 switches and 4 components to add. Ideal for schools. Supplied with motherboard.

Close up view

Back to top

 

Price: $9.99USD

18mm x 15mm COB contains a standard siren driver as found in piezo horns and toys. Drive circuit will tolerate a wide range of components values. 2V to 5V operation.

Back to top

 

Price: $12.25USD

Similar to SG1, 2 and 10 but with gun & bomb sounds inside. COB PCB: 16mm x 29mm.

SG12 Documentation

Back to top

 

Price: $8.99USD

"Happy Birthday" Melody IC COB, battery and piezo all ready to play. As found in Christmas cards and books which play when you open the page. Self-adhesive backing. Tune repeats continuously while power is connected. Total of 128 notes. Cmos LSI. Two supplied per kit. Same as SG7.

Back to top

 

Price: $8.99USD

"Three Christmas Carols" Same as SG7 & SG13 but three Christmas Carols play.

Back to top



$13.89

K31 Kit 31 9V Siren

A surprisingly loud siren for such a simple circuit. Uses voltage controlled oscillator. 1/2 Watt, 8 ohm speaker supplied. 9V operation. Ideal to attach to an alarm system which needs an sound module.

Scan of PCB





$20.59

K15 Kit 15 6-to-12V Piezo Screamer

Powerful 6V to 12V piezo alarm. Uses 556, auto-transformer and two piezo alarm elements. Circuit will deliver over 110dB at 1 meter. Uses sweep circuit so there is no need to trim the circuit to match the cavity resonant frequency. We supply a plastic box with two piezo elements (35mm diameter) already mounted in their own resonant cavity. This is part of a commercial alarm unit but it uses our (better!) drive circuit. Ideal alarm unit for Kit 53 (Codepad/Burglar Alarm).

Scan of PCB





$17.00

K116 Kit 116 Alarm Siren Driver

Driver circuit for 8 ohm horn speakers. Based on the Zetex ZSD100 siren driver IC. 4V - 18V. 120dB of sound.

Scan of PCB

 

Email us if you have any questions.

Place an order

Back to the main kits page

A1 Electronic Parts
196 North Queen St.
Toronto, Ontario
M9C 4Y1
Tel: (416) 255-0343
Fax: (416) 255-4617