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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 […]

Make the switch touch with the Electronics Schematic Diagram

Make the switch touch with the Electronics Schematic Diagram Turn on and off electrical devices using the touch of a button, so you can “play” your electronic devices more enjoyable, Touch the switch can be used in dry places and will not survive wet or very dusty areas.. You only need to add a relay […]

Dancing LEDs pcb diagram

Dancing LEDs pcb diagram using 4017, 555

Quality Inverter-Chargers

Quality Inverter-Chargers Quality Inverter-Chargers using 2N2222, 74AUC1G14DBVR High Quality Inverter-Chargers High amp charger circuit diagram Inverter charger circuit diagram using 2N2222, 74AUC1G14DBVR

Make Schema PC via a USB connection to RS232 converter

USB to RS232 Converter Circuit Description For the complete equipment needed to make schema PC via a USB connection to RS232 converter We scan controller is an independent board that communicates with the PC via USB connection. This encourages galvos XY scanner and generate signals for data acquisition time. USB to RS232 converter board is […]

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