Small value rc helicopters capacitors can be ceramic or metallic polyester according to the values given in the list of materials. In his welding avoid excessive heat by this operation quickly.
In case you are not familiar with rc helicopters details, you might want to find out that the overall functionality depends on its system functioning. Thus, you must focus on details. The capacitors together with the circuits vary and this represents its strength.
The coil is the last component to install- it can and should be mounted by the same owner or hobbyist. This coil is shown in Figure 6 and consists of 5 turns of 22AWG magnet wire (or close to it width) without form and diameter 0.8 to 1 cm. When welding this coil, scrape well the tips to remove the enamel layer that covers it, because otherwise the solder will not "stick" and the transistor will not work.
If you mount terminal jumper, complete interconnection soldering the wires and then the wires to the pressure switch, battery holder and antenna. If you mount a PCB, then solder only the battery holder, antenna and switch. Fixing the items in the box can be done in various ways. The printed rc helicopters circuit board can be screwed like the bridge of the battery terminals and maintained in the appropriate place for a piece of nylon foam. When the box is closed, the pressure remains fixed foam battery.
Adjustment and Operation
After refitting, the reader should verify all connections, if everything was in order, but without the receptor, may make a test run with an ordinary FM radio.
For this rc helicopters proceed you might follow these steps:
- Place the battery in the transmitter and connect support in its vicinity an FM radio, tuned to the lower end of the range, or at 88MHz, as shown in Figure 8.
- Then, while you press the transmitter switch with a screwdriver will open the trimmer until the signal is captured on the radio. This signal is given by a continuous hissing sound in the frequency of 1,000 Hz or so.
- If nothing else happens it may be because the transmitter is not oscillating, you should check the RF device, that is: Q1 around the rc helicopters components.
If you hear just a "puff" in the FM receiver is a sign that only the RF is working and there is no modulation. The reader should verify the transistors Q2 and Q3 and also components in its vicinity, as the multi vibrator is not operating. The audio signal, as we saw, is given by the values of the capacitors C2 and C3.We give below a list of two
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