2011年11月27日星期日
this is “2.1 Channels LM1875 HiFi Audio Power Amplifier ”. only $24
Features
- Designed with National Semiconductor LM1875 and famous audio operational amplifier NE5532.
- 2 x 6800uF power filter capacitors
- ±1% metal film resistors are used to guarantee the SNR
- 1.6mm high quality double side 2oz PCB
HiFi audio power amplifier designed with NE5532 + LM1875, 2.1 channel, 25W + 25W
this is “2.1 Channels LM1875 HiFi Audio Power Amplifier ”. only $24
- Designed with National Semiconductor LM1875 and famous audio operational amplifier NE5532.
- 2 x 6800uF power filter capacitors
- ±1% metal film resistors are used to guarantee the SNR
- 1.6mm high quality double side 2oz PCB
HiFi audio power amplifier designed with NE5532 + LM1875, 2.1 channel, 25W + 25W
this is “2.1 Channels LM1875 HiFi Audio Power Amplifier ”. only $24
2011年11月24日星期四
What is the principle of radio?
Radio is in free space (including air and vacuum) electromagnetic wave propagation, the frequency 300GHz or less (lower frequency than the non-uniform, in a variety of RF specifications book, the common three 3KHz ~ 300GHz, 9KHz ~ 300GHz, 10KHz ~ 300GHz). Radio signal by radio wave propagation techniques.
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