Focus Stunt - Multi control
Focus Stunt is the second version of uAstro multi-control system that comprises a hand full of functions for auto focusing and AF (Astro-Photography) aid.
The 2014 version combines in a single system the control of 2 focusers with temperature compensation, dew heaters (fans, lighs, etc) with variable power and temperature/humidity threshold limits, filter wheel and telescope cap. It interfaces with the external would via Blue Tooth, USB, SPI and UART (COM) and allows the system to be controlled using a PC, Smart Phone, uAstro Key pad, external device (AZetEQ Drive, EQ, etc) ... and also serves as a "hub" do control Synta EQ mounts from a single connection, please see the full list of features and functional diagram below.
| Connection | Description | Use |
| Motor 1 | Stepper motor driver | Focus motor |
| Motor 2 | Stepper motor drive | Focus motor Filter wheel Telescope Cap |
| Output 1 | Mosfet power output | Dew heater Fan etc |
| Output 2 | Mosfet power output | Dew heater Fan etc |
| USB | USB type B | USB (V-COM) communication ASCOM driver - third part control soft Proprietary control software SkyWatcher protocol to control mount on AUX port EQ-MOD to control mount on AUX port |
| Bluetooth | Bluetooth wireless connection | Same functionality as USB Andoid App for remote control |
| PAD | Keypad/DRO port | External uAstro keypad with LCD |
| AUX | Auxiliary port | Control from AZetEQ Drive / other uAstro devices Pass-through to SW mounts |
| SENSE | Temperature & humidity port for supplied sensor |
Connect the temp/humidity sensor to this port |
| SPI | SPI BUS | Telescope Cap Future use |
| Power supply voltage range: | 9V to 14V DC |
| System power consumption: | ~150mA (motors and Output devices not included) |
| MCU: | 32 bits @ 80Mhz |
| High power motor drivers: | up to 2A (configurable) per motor |
| Motor steps: | Full, 1/2 step, 1/4 step and 1/8 |
| Auto motor sleep: | 30 secs after last use |
| Auto Focus position e temp save: | 30 secs after last use |
| Bluetooth transceiver: | up to 15 meters range |
| Temp/humidity sensor range: | humidity 0-100%RH; temperature -40~125Celsius |
| Temp/humidity update freq: | 10 secs (firmware configurable) |
| Max Amps per Output: | 8A RMS, 20A peek |
| IO levers on PAD and AUX ports: | TTL |
| Working ambient temperature range: | -30ºc to +85ºC |
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