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74 series digital circuit of 74132 74LS132 four 2 input with the schmidt flip-flop

Published:2011/3/29 22:43:00 Author:Ecco | Keyword: digital circuit, four 2 input, schmidt flip-flop

74 series digital circuit of 74132 74LS132 four 2 input with the schmidt flip-flop

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74 series digital circuit of 74LS137 74S137 3 - 8 line decoder

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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74 series digital circuit of 74S133 74LS133 13 input and negater

Published:2011/3/29 22:43:00 Author:Ecco | Keyword: digital circuit , 13 input, negater

74 series digital circuit of 74S133 74LS133 13 input and negater
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74 series digital circuit of 74S140 double 4 input with non-line drive(50Ω）

Published:2011/3/31 1:42:00 Author:Ecco | Keyword: digital circuit , double 4 input , non-line drive

74 series digital circuit of 74S140 double 4 input with non-line drive(50Ω）

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74 series digital circuit of 74S134 12 input and negater

Published:2011/3/29 20:46:00 Author:Ecco | Keyword: digital circuit , 12 input, negater

74 series digital circuit of 74S134 12 input and negater
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74 series digital circuit of 74LS138 74S138 3 - 8 line decoder/multiplexer

Published:2011/3/29 22:43:00 Author:Ecco | Keyword: digital circuit, 3 - 8 line decoder, multiplexer

74 series digital circuit of 74LS138 74S138 3 - 8 line decoder/multiplexer
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74 series digital circuit with 74LS139 74S139 2-4 line decoder/multi-channel converter

Published:2011/3/29 22:44:00 Author:Ecco | Keyword: digital circuit , 2-4 line decoder, multi-channel converter

74 series digital circuit with 74LS139 74S139 2-4 line decoder/multi-channel converter
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Measuring Amplifier input stage issue circuit

Published:2011/3/31 0:56:00 Author:Joan | Keyword: Amplifier input stage

Measuring Amplifier input stage issue circuit
Below is Measuring issue of Amplifier input stage circuit. (View)

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800W two-way dimmer control circuit

Published:2011/3/21 1:49:00 Author:Joan | Keyword: dimmer control

800W two-way dimmer control circuit
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. (View)