Published:2011/3/29 22:43:00 Author:Ecco | Keyword: digital circuit, four 2 input, schmidt flip-flop
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Published:2011/3/31 1:44:00 Author:Ecco | Keyword: digital circuit, 3 - 8 line decoder
74 series digital circuit of 74LS137 74S137 3 - 8 line decoder(with address latching) (View)
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Published:2011/3/29 22:43:00 Author:Ecco | Keyword: digital circuit , 13 input, negater
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Published:2011/3/31 1:42:00 Author:Ecco | Keyword: digital circuit , double 4 input , non-line drive
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Published:2011/3/29 20:46:00 Author:Ecco | Keyword: digital circuit , 12 input, negater
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Published:2011/3/29 22:43:00 Author:Ecco | Keyword: digital circuit, 3 - 8 line decoder, multiplexer
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Published:2011/3/29 22:44:00 Author:Ecco | Keyword: digital circuit , 2-4 line decoder, multi-channel converter
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Published:2011/3/31 0:56:00 Author:Joan | Keyword: Amplifier input stage
Below is Measuring issue of Amplifier input stage circuit.
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Published:2011/3/21 1:49:00 Author:Joan | Keyword: dimmer control
800W dimmer circuit:
The below figure is a typical dimmer circuit.
Circuit principle: the main circuit is a triac SCR. It controls SCR conduction angle to change the current through RL, so as to achieve dimming purpose. The trigger circuit is a single junction transistor phase-shift trigger. QL bridge rectifier provides synchronization power for the trigger circuit. the R1 reduced voltage, DW regulator provided synchronous voltage for the single-junction transistor, W and C1 form phase shift circuit.
When the synchronous power charges C1 to unijunction transistor V1 peak voltage, V1 turns on, C1 discharged current generates pulses in the T1 secondary, which triggers SCR turn on. Adjusted W can change the SCR conduction angle.
Pulse transformer winding: Wire around ferrite core 60 ~ 80T each with a diameter of 0.2mm magnet in the primary and secondary.
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Published:2011/3/21 0:45:00 Author:Joan | Keyword: Amplifier, input impedance, FET
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Published:2011/3/23 20:21:00 Author:Joan | Keyword: Integrated Amplifier, Basic Application
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Published:2011/3/28 2:00:00 Author:Ecco | Keyword: Touch dimmer
Touch dimmer composed of LS7232 is as below:
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Published:2011/3/28 1:56:00 Author:Ecco | Keyword: Six channel remote
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Published:2011/3/28 1:51:00 Author:Ecco | Keyword: Four channel remote
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Published:2011/3/28 1:19:00 Author:Ecco | Keyword: sound controlling supply socket , transistor
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Published:2011/3/30 21:50:00 Author:Ecco | Keyword: crystal triode
The inside circuit diagram of crystal triode EMH15 is as below:
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Published:2011/3/30 21:50:00 Author:Ecco | Keyword: The interface circuit
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Published:2011/3/30 21:51:00 Author:Ecco | Keyword: The interface circuit
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Published:2011/3/30 21:51:00 Author:Ecco | Keyword: interface circuit
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Published:2011/3/30 21:42:00 Author:Ecco | Keyword: interface, microprocessor
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