Remote Control Model Toy

Model Glow Plag driver circuit

model airplanes, boats, cars and use of ignition of glow plugs for their miniature (O. Bcc to 15cc) internal combustion engines. These engines happen with the heavy batteries on board, HT coil, and "condenser" spark required for ignition classic, while simultaneously developing much higher RPM (and thus power) as the compression ignition (diesel) engines . The heart of a candle is a coil of platinum alloy filament heated to start the engine by an external battery, or 1. 5 volts or 2 volts. To complete this battery, a second power supply of 12 volts is often necessary to start the engine, together with a third type 6 volt electric fuel pump. ..

Radio Control Motor speed Interface

The second half controls the steering. The mechanical design is a 3 wheeled caddy with the ´single wheel´ actually a closely spaced pair of wheels which are driven by the main drive motor top provide motive power (this is the motor controlled by the first circuit). However the pair are on a motorised swivel arrangement: this second motor is the steering and can rotate the pair through 180 degrees, thus providing not only the steering but also the direction control...

RC transmitter with MC68HC711

The first SUPERTEF version was using a 68HC11 microprocessor in extended mode i.e. with an external memory program which necessitated many integrated circuits (IC) such as the 74C138, 74C373, 68HC24 and 27C64 making the printed circuit board densely populated and prone to defects. Now, SUPERTEF 96 uses a 68HC711E9 that is to say the same basic chip but with an INTERNAL program memory operating in "mono-chip" mode without the need for all the IC's above. The coder then became ultra-simple and except for monstrous errors, cannot not function since all that is active is IN the microprocessor. The INTERNAL storage in question has a capacity of 12 Kbytes instead of the 27C64's 8 Kbytes. The program is more performant. Let us say that it was necessary all the same to add a small external memory storage to place the data for 27 possible models...

RC Receiver for model airplane

This project will explain how you can build a receiver for 35MHz. The receiver is based on the FM receiver circuit MC3371, and the frequency is PLL controlled with LMX2306 circuit. In this project I will build a radio receiver for RC air planes. There are 20 different frequencies (channels) used for radio controlling RC air planes. Each user needs it own frequency, else you will controll someone else plane. The lowest frequency is 35.010MHz and the highest is 35.200MHz. In practice there are 20 different crystalls for each channel. In my receiver I have no crystal for each frequency, instead I use a frequency synthesizer. With this system I can in a very simple way choose any channel I want to receive. I will explain how a frequency synthesizer works and how you can control it. ..

autopilot with rev 2.2 board

The servo driver is just simply two 4017 decade counters and lots of 0.1" headers. Only populate the A side headers; the B servo bank is optional and will require a few more header pieces. If you received 20 headers, you'll be short two of them. If you received 25 headers, go ahead and fill it up. You will have to cut the headers to get the 2 pin header for the power supply. There is a mistake (sorry!) in the 4017 power supply. You have to cut the two traces and solder on a jumper as shown. Zoom in to see the trace on the bottom that needs to be cut. The corresponding trace on the top also has to be cut. Zoom in on the next image to see the one to cut on top. Be sure that they are both fully severed; otherwise you will short the power supply and things won't work...

R/C Airplane LED Flasher

This was designed to flash a pair of LEDs to be mounted on the wing tips of a Parkzone Citabria R/C (remote control) airplane. The unmodified Parkzone Citabria only weights 20 grams (about 0.7 oz), so weight, and therefore the number and size of the electrical components for the flasher are critical. Another major constraint was the range of power supply voltage and current draw. The battery in the Parkzone Citabria varies from 3.7 to 4.2 volts. which rules out circuits such as the Simplest LED Flasher Circuit, which requires a higher voltage. Current draw also needs to be kept low because the battery is tiny. The CMOS AVR controller handles both of these requirements beautifully. ..

This simple circuit drives 6 LEDs in `Knightrider scanner mode`. Power consumption depends mainly on the type of LEDs used if you use a 7555 (555 CMOS version)...

Design a circuit for HO trains models, which flashes a LED in a manner that duplicates the light from a lighthouse. The circuit I came up with is shown below. It uses two dual low power op amps. The first two devices form a classic oscillator circuit whose output is a triangle waveform signal. That signal is routed to a current regulator circuit, which converts the triangle voltage signal to a triangle current signal through the lighthouse LED...

The pulse generation is done by the PIC processor. The rest of the components are power supply and reset circuitry. The transmitter sends out two different 8-bit codes, one for each LED. This makes it possible to detect the direction of the loco. I let the codes differ only in bit 7 and the parity bit. This gives a very simple PIC program...

Getting the power from your 110 volt receptacle to a suitable foam cutting format presents several problems. A standard light dimmer can be successfully used to vary the heat, but it can`t heat the wire in a direct circuit. With a light dimmer powered by straight line current, you are taking a great risk of electric shock. Also, a guitar string is not going to be longer than about 2-3 feet (unless you get it bulk). But then how long of a wire are you planning to cut with? If the wire is too short (like only a foot or two) the light dimmer won`t be able to go low enough and may self destruct from excessive current, or it may light the wire up orange hot and snap it...

Foam cutting is a relatively simple process once you have the required tools and an acquired level of experience. So once you are set up, don`t be discouraged if you butcher a couple blocks of foam. You`ll soon get use to the rhythm, and your cores will turn out nice and smooth...

This is a simple project that powers a buzzer periodically to produce a loud beep. This beeping is intended to help the operator of a model plane to locate it after a crash or distant landing...

The current concept incorporates a wireless transmitter and receiver and is thought to be used for remote controlled airplanes or appliances with two seperate parts. In other words, we have one dedicated transmitter (acquisition, filtering) and one dedicated receiver part (user-interface, look-up table, calibration, storage), capable of being connected together with any physical layer, e.g. wired, wireless, infrared. If you want to build a standalone altimeter/variometer just for hiking or mountaineering, this setup can obviously be simplified by omitting the wireless components...

No description available...

The main power supply to the system must be a regulated 12 volts DC with a minimum input from the train control AC or DC power supply of 13.5 VAC connected to pos 3 and 4 of the rectifier bridge . The ground bus of the regulated 12 volts supply must be connected to the system ground , The independent speed reference voltage is taken directly from the train speed control module or can be taken by connecting directly from the tracks to positions 5 and 6 of the rectifier bridge .The output of this bridge will always be a positive speed voltage signal whichever direction the train is going...