* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download FUTURE KIT
Survey
Document related concepts
Telecommunications engineering wikipedia , lookup
Electronic engineering wikipedia , lookup
Battle of the Beams wikipedia , lookup
Opto-isolator wikipedia , lookup
Audio power wikipedia , lookup
Radio transmitter design wikipedia , lookup
Superheterodyne receiver wikipedia , lookup
Immunity-aware programming wikipedia , lookup
RLC circuit wikipedia , lookup
Integrated circuit wikipedia , lookup
Valve RF amplifier wikipedia , lookup
Crystal radio wikipedia , lookup
Radio receiver wikipedia , lookup
Home cinema wikipedia , lookup
FM broadcasting wikipedia , lookup
Index of electronics articles wikipedia , lookup
Regenerative circuit wikipedia , lookup
Transcript
Figure 1. Installing the componants ELECTROLYTIC CAPACITOR RESISTOR Figure 2. The AM radio receiver (stereo) circuit + C .....µF R POTENTIOMETER C + C + Figure 3. Connections Watch the polarity! CERAMIC CAPACITOR COIL R .....Ω C .....µF SPEAKER 4Ω ANT + VR The AM radio receiver circuit consists of a few components so it is very easy to assemble. Technical specifications: - power supply : 4.5-9VDC. - consumption : 150mA. max. @ 9VDC. - PCB dimensions : 2.61 x 1.98 inches. How to works: This circuit can divided into two sections; receiver and amplifier. IC function as a receiver. The VC (variable) and coil are frequency station tuners. The received signal will transmitted to be amplified by IC MK484. After that it is transmitted through the "OUT" pin passed on R4 and C5 to VR1 which is available for adjustment of increasing and decreasing of the sound. The middle pin of the volume is connected to the pin 3 of IC2 which is the input of amplifier. Therefore the signal is transmitted throughout the speaker. PCB assembly: Shown in Figure 3 is the assembled PCB. Starting with the lowest height components first, taking care not to short any tracks or touch the edge connector with solder. Some tracks run under components, and care should be taken not to short out these tracks. If the pins will not enter the holes with ease, use a small drill to slightly enlarge the opening. All components with axial leads should be carefully bent to fit the position on the PCB and then soldered into place. Make sure that the electrolytic capacitors are inserted the correct way around. Some components are particularly sensitive to heat ( ie: Transistors, IC's, diodes etc.) extra care must be taken to only apply the iron for as little time as possible, using a pair of pliers to grip the leads will help conduct heat away. Trim components leads with wire cutters to prevent excess lengths causing a short circuit. Now check that you really did mount them all the right way round! R AM RADIO RECEIVER (STEREO) LEVEL 1 CODE 708 VR FUTURE KIT FUTURE KIT HIGH QUALITY ELECTRONIC KITS Testing: The assembly should begin with smaller components first before proceeding to larger components accordingly. Upon completion of the assembly check to ensure that it is in order many times. After that adjust the volume to the highest frequency station compare with the other radio. If the highest station is not in the highest position, turn the variable to that point and use a screw to adjust the trimmer a little at "G" spot. The highest station will be at position that variable is turned to highest. C C IC IC + +6V + + SP + VARIABLE + + VR + IC Watch the 1 position of the notch! G 1 FT318, FK708-1 Troubleshooting: The most problem like the fault soldering. Check all the soldering joint suspicious. If you discover the short track or the short soldering joint, re-solder at that point and check other the soldering joint. Check the position of all component on the PCB. See that there are no components missing or inserted in the wrong places. Make sure that all the polarised components have been soldered the right way round. HIGH QUALITY ELECTRONIC KIT SET FOR HOBBY & EDUCATION G +6V NEW KIT SET CODE FK 511 674 675 NEW DESCRIPTION POWER TWO FUNCTION INFRARED SENSOR POWER AMP. 2W. MONO WITH SPEAKER POWER AMP. 2+2W. STEREO WITH SPEAKER 12VDC 9-12VDC NOTE: FUTURE BOX FB04 is suitable for this kit. http://www.futurekit.com 9-12VDC