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Index 420

Low-noise 5MHz oscillator

Published:2011/11/11 2:34:00 Author:Ecco | Keyword: Low-noise, 5MHz , oscillator

Low-noise 5MHz oscillator
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Single-tube RF oscillator

Published:2011/11/11 2:37:00 Author:Ecco | Keyword: Single-tube, RF oscillator

Single-tube RF oscillator
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Single-tube quartz crystal oscillator

Published:2011/11/11 2:29:00 Author:Ecco | Keyword: Single-tube, quartz crystal oscillator

Single-tube quartz crystal oscillator
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Simple FM emitter circuit diagram

Published:2011/11/11 2:24:00 Author:Ecco | Keyword: Simple FM emitter

Simple FM emitter circuit diagram
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Series resonant circuit

Published:2011/11/11 2:29:00 Author:Ecco | Keyword: Series resonant circuit

Series resonant circuit
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Magnetic pendulum oscillation circuit

Published:2011/11/11 2:30:00 Author:Ecco | Keyword: Magnetic pendulum oscillation

Magnetic pendulum oscillation circuit
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4-tube FM Transmitter

Published:2011/11/11 2:18:00 Author:Ecco | Keyword: 4-tube FM Transmitter

4-tube FM Transmitter
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MC13175-76 FM receiver circuit

Published:2011/11/11 2:11:00 Author:Ecco | Keyword: FM receiver

MC13175-76 FM receiver circuit
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Key pin features LM378 audio amplifier

Published:2011/11/4 3:00:00 Author:Ecco | Keyword: Key pin features , audio amplifier

Key pin features LM378 audio amplifier
The monolithic double power amplifier can be connected to 8Ω or 16Ω load to make each channel output 4W. The ripple suppresses is 70dB; the channel isolation is 75dB, and the input impedance 3MΩ, and it contains current limiting circuit; it has the heating protection function. (View)

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The automatic controlling circuit of electric contact pressure gauge connecting intermediate relay

Published:2011/11/8 21:18:00 Author:Ecco | Keyword: automatic controlling , electric contact , pressure gauge, connecting, intermediate relay

The automatic controlling circuit of electric contact pressure gauge connecting intermediate relay
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Electric pressure gauge connecting controlling water pump circuit 1

Published:2011/11/8 21:16:00 Author:Ecco | Keyword: Electric pressure gauge, connecting, controlling water pump

Electric pressure gauge connecting controlling water pump circuit 1

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The Y-△ starting circuit 1 for motor without power switch

Published:2011/11/3 2:04:00 Author:Ecco | Keyword: Y-△ starting , motor , without power switch

The Y-△ starting circuit 1 for motor without power switch
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The Y-△ starting circuit 2 for motor without power switch

Published:2011/11/3 2:05:00 Author:Ecco | Keyword: Y-△ starting , motor , without power switch

The Y-△ starting circuit 2 for motor without power switch
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The boost circuit using Timer IC

Published:2011/11/7 21:41:00 Author:Ecco | Keyword: boost circuit , Timer IC

The boost circuit using Timer IC
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The AC voltage measuring circuit by carrier

Published:2011/11/1 21:18:00 Author:Ecco | Keyword: AC voltage, measuring circuit , carrier

The AC voltage measuring circuit by carrier
When the input voltage is ±0.1V, adjusting R3 can make the measuring voltage reach ±10V. +V1, -V1, and +V2, -V2 are 15V, but GND uses different power supplies. (View)

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The integrated infrared receiver circuit with pre- amplifier

Published:2011/11/7 21:13:00 Author:Ecco | Keyword: integrated infrared receiver, pre- amplifier

The integrated infrared receiver circuit with pre- amplifier
In the circuit, it uses the integrated amplifier, so the circuit is simple with small size. It uses the TDA4050 IC, and the weak infrared signal is received by the photosensitive diode VD,then it is amplified by transistor. As a result of the condenser lens ( diameter is about 15mm, focal length is about 30mm), it can increase the effective distance with 20 to 30 times. Capacitor C can effectively reduce the range of 50 ~ 100Hz low-frequency interference signals. (View)