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Posts tagged 水晶

Circuit diagram 75 Meter QRP SSB Transceiver

The 75 Meter QRP SSB Transceiver Theory of Operation 6-30-03 In general, the transceiver switches the 4-element 1500 ohm xtal BPF ends between the inputs and outputs of the two SA602s to reverse the signal flow for R/T operation. Since no IF amplifier is used in the design, 20 dB of additional receiver gain is […]

LM555 Electronics Schematic Diagram Triggering And Timing Helpers For Monostable Timers part 28

LM555 Electronics Schematic Diagram Triggering And Timing Helpers For Monostable Timers part 28

Electronic Circuit Diagram TV Vertical Using LA78041, LA78040

Electronic Circuit Diagram TV Vertical Using LA78041, LA78040

Adjust the Layout of Components on PCB

Adjust the Layout of Components on PCB The layout of a PCB can be very important so I always lay the components out as they are in the circuit diagram to begin with. Instead of circuit symbols I draw the component pins. The drawing is made with a pencil on 1/4″ squared paper. The compnents […]

Engineering Tools – Timbangan digital circuit

Engineering Tools – Timbangan digital circuit using 555

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