Electronic Circuits for R/C Modeling

Useful applications for radio-controlled modeling

Table of Contents [Toc]

Projects for R/C Modeling
   CAMPAC clones
   Servo-Checker JR / Futaba / Graupner
   Servo-Checker JR / Futaba
   2.7 V to 5 V Amplifier for Futaba-Receivers
   2-Channel Switch for Futaba Systems
   2-Channel Switch for Graupner Systems
   Low-Power Accu Voltage Controller with a single LED
Microcontroller Projects
   Precision Digital Altimeter
Peripheral support
   Hardware Interface for Win95/98 Oscilloscope
Repairs
   ELV ALM 7010, ALM 7002 oder ALC 7000 defekt?

Projects for R/C Modeling [Toc] [Top]

CAMPAC clones [Toc] [Top]

Self-made memory module for Futaba R/C transmitters
Manufacture your own cheap 16kB CAMPAC module to store more model-specific configuration settings. For R/C transmitters like Futaba FC-18 V3 plus, FC-28,...

Servo-Checker for JR / Futaba / Graupner [Toc] [Top]

Self-made servo checker for Futaba or Graupner servos
Manually control your servos and adjust settings - without using any R/C transmitter & receiver
for JR / Futaba / Graupner systems (output signal level: 5 Volt)

Servo-Checker for JR / Futaba [Toc] [Top]

Self-made servo checker for Futaba servos
Manually control your servos and adjust settings - without using any R/C transmitter & receiver
for JR / Futaba systems (output signal level: 2.7 Volt)

2.7 V to 5 V Amplifier for Futaba-Receiver [Toc] [Top]

Level converter for Futaba input signals in case you want to connect 5V-level-only circuits.

2-Channel Switch for Futaba Systems [Toc] [Top]

2 channel switch for JR / Graupner / Futaba (signal levels: 2.75 Volt)

2-Channel Switch for Graupner Systems [Toc] [Top]

2 channel switch for JR / Graupner / Futaba (signal levels: 5 Volt)
Does not work directly with Futaba receivers due to different output levels.

Low-Power Accu Voltage Controller [Toc] [Top]

Voltage controller using single LED.

Note: I used common CMOS components (logical levels: 0/1 correspond to physical levels: 0/5 Volt), so remember that you need a servo-signal-amplifier for circuits you want to use with Futaba-Receivers, if circuits are not specifically designed for it.
Or consider using TTL-level compatible devices.

Microcontroller Projects [Toc] [Top]

Precision Digital Altimeter [Toc] [Top]

MPXS4100 absolute pressure sensor, PIC16F84 and wireless transmitter & receiver
Altimeter for my radio controlled modelplanes, but can also be used for hiking, climbing, mountaineering and other outdoor activities. Has an excellent resolution of 1 meter and a range of 4100 meters. This project is 'work in progress'.

Peripheral Support [Toc] [Top]

Hardware Interface for Win95/98 Oscilloscope [Toc] [Top]

Use your PC soundcard as oscilloscope
If you don't have your own oscilloscope, you can use your PC's soundcard line-in as input for a primitive oscilloscope (range 0-20 kHz). Here is the schematic of the interface. A/C coupling only.

Repairs [Toc] [Top]

ELV ALM 7010, ALM 7002 oder ALC 7000 defekt? [Toc] [Top]

Reparatur der defekten Lade-Leistungsstufe der ELV Ladegeräte ALM 7010, ALM 7002, und ALC 7000
Die Ladestufe der ELV Ladegeräte ALM 7010, ALM 7002 und ALC 7000 verwenden alle den Leistungstransistor BUZ272. Dieser kann aber nach einiger Zeit durchbrennen, unter anderem auch wegen zu schwachem Gate-Source Überspannungsschutz mit der bidirektionalen Suppressordiode BZW06-15B, welche bei älteren Geräten verbaut worden ist. (This page is intentionally written in german, since this type of appliance is mainly sold in Germany, Switzerland, and Austria.)

Last updated: 2010/10/01

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