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Index 394

QM9403 three-phase motor protection circuit

Published:2011/12/7 2:04:00 Author:Ecco | Keyword: three-phase, motor protection circuit

QM9403 three-phase motor protection circuit
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QM9403 single-phase motor protection circuit

Published:2011/12/7 1:49:00 Author:Ecco | Keyword: single-phase , motor protection

QM9403 single-phase motor protection circuit
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QX3-13 Y-△ buck starter

Published:2011/12/7 1:54:00 Author:Ecco | Keyword: Y-△ buck Starter

QX3-13 Y-△ buck starter
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RSCW-102 rechargeable shaver circuit

Published:2011/12/7 1:57:00 Author:Ecco | Keyword: rechargeable shaver

RSCW-102 rechargeable shaver circuit
RSCW-102razor is suitable for AC , DC , and it has a charging function , and it isshown inthe circuit . (View)

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First-order bypass filter

Published:2011/12/6 1:49:00 Author:Ecco | Keyword: First-order , bypass filter

First-order bypass filter

Design value Example : (View)

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The first-order band-pass filter composed of an operational amplifier

Published:2011/12/6 20:44:00 Author:Ecco | Keyword: first-order, band-pass filter , operational amplifier

The first-order band-pass filter composed of an operational amplifier
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8W amplifier

Published:2011/12/6 1:37:00 Author:Ecco | Keyword: 8W , amplifier

8W amplifier
Although the TDA2030 can deliver 20 watts of output power, I deliberately reduced the output power to about 8 watts to supply 10 watt speakers. Input sensitivity is 200mV. Higher input levels naturally will give greater output, but no distortion should be heard. The gain is set by the 47k and 1.5k resistors. The TDA2030 IC is affordable and makes a good replacement amplifier for low to medium audio power systems. Incidentally, it is speaker efficiency that determines how 'loud' your music is. Speaker efficiency or sound pressure level (SPL) is usually quoted in dB/meter. A speaker with an SPL of 97dB/m will sound louder than a speaker with an SPL of 95dB/m. (View)

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CA3080 variable gain amplifier circuit

Published:2011/12/6 20:26:00 Author:Ecco | Keyword: variable gain , amplifier

CA3080 variable gain amplifier circuit
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15W amplifier

Published:2011/12/6 1:42:00 Author:Ecco | Keyword: 15W , amplifier

15W amplifier
This amplifier uses a dual 20 Volt power supply and delivers 15 watts RMS into an 8 ohm load. Q1 operates in common emitter, the input signal being passed to the bias chain consisting of Q8, Q9, D6, D13 and D14. Q8 and Q9 provide a constant current through the bias chain to minimize distortion, the output stage formed by a discrete darlington pair (Q2,Q4) and (Q7,Q11). The last two transistors are power Transitors, specifically the 2N3055 and MJ2955. The 7.02K resistor, R16 was made using a series combination of a 4.7K, 680 Ohms, and two 820 Ohms. The 1.1K resistor, R3 was made using a 100 Ohms and a 1K resistor. You can use this circuit with any walkman or CD player since it is designed to take a standard 500mv RMS signal. (View)

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Samsung T100/T108 mobile phone repairing physical diagram (2)

Published:2011/11/29 1:40:00 Author:Ecco | Keyword: Samsung , mobile phone repairing , physical diagram

Samsung T100/T108 mobile phone repairing physical diagram (2)
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Precision unity-gain buffer circuit

Published:2011/12/5 21:23:00 Author:Ecco | Keyword: Precision, unity-gain, buffer

Precision unity-gain buffer circuit
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Broadband operational amplifier

Published:2011/12/5 21:25:00 Author:Ecco | Keyword: Broadband , operational amplifier

Broadband operational amplifier
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Wideband operational transconductance amplifier buffer circuit OPA660

Published:2011/12/5 21:24:00 Author:Ecco | Keyword: Wideband , operational, transconductance, amplifier, buffer

Wideband operational transconductance amplifier buffer circuit OPA660
The internal principle circuit: (View)

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Zero-drift inverting amplifier circuit

Published:2011/12/5 21:15:00 Author:Ecco | Keyword: Zero-drift , inverting amplifier

Zero-drift inverting amplifier circuit
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Zero-drift operational amplifier circuit

Published:2011/12/5 21:14:00 Author:Ecco | Keyword: Zero-drift , operational amplifier

Zero-drift operational amplifier circuit
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Simple low-pass filter circuit

Published:2011/12/6 1:03:00 Author:Ecco | Keyword: Simple , low-pass filter

Simple low-pass filter circuit
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DC motor current detection circuit for adjusting over threshold or not

Published:2011/12/6 1:03:00 Author:Ecco | Keyword: DC motor , current detection , over threshold

DC motor current detection circuit for adjusting over threshold or not
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High-voltage high -current operational amplifier circuit 3583

Published:2011/12/6 0:55:00 Author:Ecco | Keyword: High-voltage, high -current, operational amplifier

High-voltage high -current operational amplifier circuit 3583
Figure (a) shows the methods for zerosetting ; Figure (b)shows the cylindrical package pin-out. (View)