I’ve made a few changes to the design of the transceiver. Changed the layout of the printed on the plate. Dodalem emisje CW. I added the emissions CW. Pressing PTT microphone transmitter runs in the SSB mode, pressing the key forces CW emissions at the same time blocking the track microphone. If you plan to construct a device SSB skip the numbers from 1 to 99 For the CW must be fully fill the plate and in addition, do less, for which there is a temporary arrangement remains uncovered broadcasting BK together with the control block, built on a CMOS system in 4093 and monitor broadcasting.
LA1185 FM receiver
RF amplifier, mixer, local oscillator
Improvement in cross modulation characteristics due to the use of double-balanced mixer
Improvement in strong input characteristic
Minimum number of external parts required
Less spurious radiation from local oscillator
Operating voltage range : 1.5 to 8.0 V
Source: tyfek.republika.pl 80M Transceiver SSB-CW LA1185 alternative link:
Password: 320volt.com
Published: 2008/09/25 Tags: analog circuits projects
AT89C51 L293D Motor Control Project
AT89C51 L293D Motor Control Circuit Operation, Our project name and the name suggests, the treadmill is the motor control is required. When designing this project, I saw fit to use DC motors. Because the use of DC motors and have come to the fore in terms of ease of feeding.
An integrated circuit for driving DC motors, which use integrated’ve L293D. Integrated amplifier comprising transistors that are inside. Further information about Integrated PDFs are also available. As for operation of the circuit, in this embodiment via PWM DC motor speed control performed to obtain the sign amaçlanmaktadır.pwm Scheduler \ counter and timer 0 is used, so that a stone is set at 1 ms.