Showing posts with label 2. Show all posts
Showing posts with label 2. Show all posts
Saturday, July 6, 2013
Simple 2 1 Surround Speaker System Circuit Diagram
Part List
| Component No: | Value | Usage |
| All C1 | 100MF | Grounding |
| All C2 | 100nF | Grounding |
| All C3 | 100nF | Grounding |
| All C4 | 100MF | Grounding |
| All C5 | 100MF | Feedback |
| All C6 | 100MF | Audio Coupling |
| All C7 | 220nF | Noise Grounding |
| All R1 | 1K | |
| All R2 | 10K ( Not 1K ) | |
| All R3 | 22K | |
| All R4 | 22K (Not 1K ) | |
| All RV1 | 100K | Volume Controlling |
| All D1 To D2 | IN4007 | Potential Breaking |
| U1 To U6 | TDA2030 | Amplification |
Applications
* 2.1 Surround Amplifier
* 2.1 Home Theater
9 Volt 2 Ampere DC Power Supply Circuit Diagram
There is little to be said about this circuit. All the work is done by the regulator. The 7809 can deliver up to 2 amps continuous output whilst maintaining a low noise and very well regulated supply. The circuit will work without the extra components, but for reverse polarity protection a 1N5400 diode (D1) is provided at the input, extra smoothing being provided by C1. The output stage includes C2 for extra filtering, if powering a logic circuit than a 100nF (C3) capacitor is also desirable to remove any high frequency switching noise.
Circuit diagram:
Circuit diagram:
Parts:
C1 = 100uF-25V electrolytic capacitor, at least 25V voltage rating
C2 = 10uF-25V electrolytic capacitor, at least 6-16V voltage rating
C3 = 100nF-63V ceramic or polyester capacitor
IC = 7809 Positive Voltage Regulator IC
D1 = 1N5400 Diode
C1 = 100uF-25V electrolytic capacitor, at least 25V voltage rating
C2 = 10uF-25V electrolytic capacitor, at least 6-16V voltage rating
C3 = 100nF-63V ceramic or polyester capacitor
IC = 7809 Positive Voltage Regulator IC
D1 = 1N5400 Diode
Wednesday, May 29, 2013
Sound Effects Generator 2
This circuit uses the Holtek HT2884 IC to produce 8 different sound effects. All sound effects are generated internally by the HT2884 IC. Power is a 3 Volt battery, but the IC will work with any voltage between 2.5 and 5 Volts. Switch S1 is the on / off switch.
The output at pin 10 is amplified and drives a small 8 ohm loudspeaker. Pressing S3 once will generate all the sounds, one after another. S2 can be used to produce a single sound effect, next depression gives the next sound effect. There are 2 lazer guns, 1 dual tone horn sound, 2 bomb sounds, 2 machine gun sounds and a rifle shot sound. Standby current is about 1 uA at 3 Volt, so battery life is very economical.
The IC may be obtained from Maplin Electronics order code AZ52G
Sound Effects Generator 2 Circuit Diagram:
The output at pin 10 is amplified and drives a small 8 ohm loudspeaker. Pressing S3 once will generate all the sounds, one after another. S2 can be used to produce a single sound effect, next depression gives the next sound effect. There are 2 lazer guns, 1 dual tone horn sound, 2 bomb sounds, 2 machine gun sounds and a rifle shot sound. Standby current is about 1 uA at 3 Volt, so battery life is very economical.
The IC may be obtained from Maplin Electronics order code AZ52G
Tuesday, April 2, 2013
Ding Dong Door Bell Circuit Design using 8021 2 IC
The following schematic shows a Ding Dong Door Bell Circuit Design using 8021-2 IC. The 8021-2 IC is an 8-pin DIP having an in-built circuitry to produce dingdong sound each time its pin 3 is pulled low. The Ding Dong Door Bell Circuit Design consists of: On-Off Switch, 3Volt Battery, push to on switch, speaker, transistors and resistor.
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