Published:2013/2/18 0:43:00 Author:Ecco | Keyword: computer subwoofer speaker
This circuit uses a tda1521 as a two-channel power amplifier, and another tda1521 btl output is used as subwoofer amplifier. ic1 and ic2 may use the ne5532, jrc4558 or tl082. You can also use other high-end op amp such as op275, lt1057, opa2604, etc. But for computer speaker, the ordinary op put is enough.
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Published:2013/2/18 0:46:00 Author:Ecco | Keyword: Photodiode signal conditioning , barcode scanner
The circuit is used for processing the level signal of the photodiode in barcode scanner, the current output of IC1 will be converted into a voltage output and further being amplified in the IC2. The amplified signal is sent to the peak holding circuit, thereby establishing a reference level, then the comparator output is 0 or 1.
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Published:2013/2/18 0:57:00 Author:Ecco | Keyword: 10W, single-ended amplifier
6C33C-B is a low internal resistance, linear tri-polar bile. Filament voltage is 6.3V/12.6V, filament current is 6.6A/3.3A, screen consumption is 60W, 26 to 40mA / V, transconductance amplification factor is 24, the single-ended amplifier with 6C33C-B has mellow and sweet tone. The circuit is shown as figure, the former uses high μ tube 6SQ7GT for voltage amplification to promote with 6C5P as cathode follower.
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Published:2013/2/18 0:10:00 Author:Ecco | Keyword: Signal acquisition , processing
Signal acquisition and processing circuit diagram is shown as figure.
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Published:2013/2/18 0:06:00 Author:Ecco | Keyword: Band pass filter, operational amplifier
Band pass filter diagran with operational amplifier is shown as figure.
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Published:2013/2/17 20:34:00 Author:muriel | Keyword: wireless telephone bug
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Published:2013/2/17 20:33:00 Author:muriel | Keyword: VXO FM Bug
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Published:2013/2/17 20:31:00 Author:muriel | Keyword: Simple Phone Tap
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Published:2013/2/17 20:30:00 Author:muriel | Keyword: Infinity Bug
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Published:2013/2/17 20:29:00 Author:muriel | Keyword: Infinity Bug
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Published:2013/2/17 20:29:00 Author:muriel | Keyword: FM Transmitter
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Published:2013/2/17 20:28:00 Author:muriel | Keyword: FM Telephone Bug
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Published:2013/2/17 20:27:00 Author:muriel | Keyword: Telephone Transmitter
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Published:2013/2/17 20:27:00 Author:muriel | Keyword: wireless microphone
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Published:2013/2/17 20:25:00 Author:muriel | Keyword: Electronic Eavesdropping Devices, Detector
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Published:2013/2/17 20:22:00 Author:muriel | Keyword: CRYSTAL LOCKED, FM BUG
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Published:2013/2/17 20:21:00 Author:muriel | Keyword: Bug Detector, Beep
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Published:2013/2/17 20:21:00 Author:muriel | Keyword: Mini Bug Detector
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Published:2013/2/17 20:19:00 Author:muriel | Keyword: HIGH POWER, FM MIC
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Published:2013/2/17 20:15:00 Author:muriel | Keyword: Ultra , Low Noise, Precision , High Speed, Op Amps
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