Description
UM66 is a melody generating IC commonly used in calling bell, phone, toys, musical bell in doors, home security alarm systems, burglar alarms etc. It is a three pin IC looks like a transistor. Its first pin is ground, second is VCC and the third is the melody output. Supply voltage that can be given to the IC is in the range of 1.5V- 4.5V. These are CMOS ICs and have very small power consumption. Melody generator will reset when the power is turned on and then the melody begins from the first note.
The melody generator has an inbuilt beat and tone generator. The time base for beat and tone generator is an inbuilt oscillator. Tone generator and beat generator are programmed divider. Tone generator produces certain frequency. These frequencies are a factor of the oscillator frequency. Beat generator contains 15 available beats. Of these four beats can be selected. It has a 62 notes ROM to play music. A set of 4 bits controls the scale code while 2 bits control the rhythm code.
Many versions of UM66 are produced to generate tones of different songs, for eg. UM66T01 generates tone for songs ‘Jingle bells’, ‘Santa Claus is coming to town’ and ‘We wish you a merry X’mas’, UTC UM66T05L for ‘ Home sweet home’, UTC UM66T19L for ‘ For Alice,’ UTC UM66T32L for ‘COO COO waltz’ and UTC UM66T68L ‘It is a small world’.
.The supply input to the IC should not exceed 4.5V. Otherwise it may damage the IC. So if we want to combine this circuit with some other circuit having VCC greater than 4.5V then use zener diode voltage regulator.
The following diagram shows the working of UM66 as a musical IC.
UM66 Musical Bell Circuit Diagram
Wiring in breadboard,
UM66 Music Circuit on Breadboard
In this zener diode voltage regulator is used. This will maintain the required supply voltage less than 4.5 while combining with other circuits. Here zener diode with a breakdown voltage of 3.3V is used. This will maintain output voltage nearer to 3.3V for a wide range of reverse current. Supply input (pin 2) of the UM66 is given to the regulator output. Melody output is taken from pin3. This output is lower in amplitude and cannot drive a loudspeaker. Thus an NPN transistor is used for amplification. Output of the melody generator is given to the BC547 NPN transistor through 1K resistor for limiting the current. Amplified output is given to the loudspeaker.
Note : You can use a low power speaker like 8Ω, 0.5W.
Additional information
Weight | 0.002 kg |
---|
You must be logged in to post a review.
PCB For ESP32 8 Relay 5V Module
Carbon Resistor 0.25W 150R 150 Ohm
SMD Chip Resistor size 0603 10K Ohm
HDMI Male to DVI-I Dual Link Female Adapter
Refund Policy for UGE Electronics “Https://uge-one.com “
1. Returns and Refunds
Thank you for shopping at UGE Electronics “Https://uge-one.com “. If you are not entirely satisfied with your purchase, we’re here to help.
2. Eligibility for Refund
To be eligible for a refund, please make sure that:
– The item was purchased in the last 14 days.
– The item is in the original packaging.
– The item isn’t used or damaged.
3. How to Initiate a Refund
To initiate a refund, please contact our customer support at [[email protected]] or [01066552125]. Provide your order number and details about the product you would like to return.
4. Refund Processing Time
Once we receive your item, we will inspect it and notify you that we have received your returned item. We will immediately notify you on the status of your refund after inspecting the item.
If your return is approved, we will initiate a refund to your credit card (or original method of payment). You will receive the credit within a certain amount of days, depending on your card issuer’s policies.
5. Shipping Costs
Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
6. Exchanges
If you wish to exchange an item, please contact our customer support. You will be responsible for the return shipping costs, and we will cover the shipping costs of the replacement item.
7. Damaged or Defective Items
If you received a damaged or defective product, please contact us immediately for assistance. We will work with you to resolve the issue promptly.
8. Contact Information
If you have any questions about our Refund Policy, please contact us at [[email protected]].
Important Note: This Return & Refund Policy is applied only for Orders invoiced VIA UGE Electronics, and regarding any Orders has been invoiced VIA any Other Vendor you can check the Return & Refund Policy of this Vendor VIA the Vendor Stroe Page, and it’s not our responsibility for any issue between you and the Vendor.
Reviews
There are no reviews yet.