Home > Robot Kits > Full Robotic Systems > VEX > VEX Parts and Accessories >
VEX Micro Controller
Item #:
FRS-V-276-2170
Availability: In Stock
Retail: $149.99
Price: $134.95
- VEX Microcontroller
- Radio controlled + programmable
- 16 Analog/Digital I/O ports
- 8 Motor outputs
- 6 Interupt ports
- Onboard Serial
- 10 MIPS PICmicro® PIC18F8520
- Programmable in 'C'
|
 |
| Inputs and Outputs |
| Battery input |
7.2 volts nominal, 6 to 9 volts min/max input range |
| Battery Type |
6 AA batteries (not included) or VEX Robotics Power Pack |
| Interrupt inputs |
6 |
| Digital I/O |
16 max with no Analog, Each can be input or Output (shared with Analog) |
Input Impendence
|
Analog/Digital - The input consists of a 470K pull-up to +5V and a series resistance of 1K to the uP.
Interrupts - The input consists of a series resistance of 1K to the uP. More info - input Schematic. |
| Analog inputs |
16 max with no Digital, 10-bit resolution (shared with Digital) |
Digital/Analog
as inputs |
3 dB bandwidth of 150 kHz, weak pull-up of 470k-ohms to 5.0 volts,
need 0.0 to 0.6 volts for a low and 4.0 to 5.0 volts for a high |
Interrupts
as inputs |
3 dB bandwidth of 150 kHz, weak pull-up of 47k-ohms to 5.0 volts,
need 0.0 to 0.6 volts for a low and 4.0 to 5.0 volts for a high |
Digital/Analog
Interrupts
as Outputs |
As outputs these ports can drive an open circuit to 0.6v or lower for a low and 4.0 volts or higher for a high.
They can drive a 1 mA load to 1.6v or lower for a low and 3.0 volts or higher for a high. |
PWM Outputs
|
As outputs these ports can drive an open circuit to 0.6v or lower for a low and 4.0 volts or higher for a high.
They can drive a 1 mA load to 1.0v or lower for a low and 3.6 volts or higher for a high. |
| Digital input Freq. |
50 KHz (typical) |
| Analog input Access |
10 μSec |
| Motor Output |
8 PWM Outputs for motors or servos, refreshed every 18.5mSec |
| Serial Ports |
TTL (115Kb) - Serial Port and TX/RX on Digital/Analog port |
| Pinout |
Digital/Analog, Interrupts, Motor Outputs: Outside pin (closest to the controller edge) Ground
Digital/Analog, Interrupts: Center pin (or middle pin) + 5 Volts, 1 Amp Max combined total from all pins
Motor Outputs: Center pin (or middle pin) + Battery Power, 4 Amps Max combined total from all pins
Digital/Analog, Interrupts, Motor Outputs: Inside pin (furthest from the controller edge) Signal / Control line
|
| User Programmable Micro-Controller |
| User Microcontroller |
Microchip PICmicro® PIC18F8520 |
| Processor Speed |
10 MIPS (Million Instructions Per Second) |
| Variable Space |
1800 bytes + 1024 bytes EE2 |
| Program Space |
32K |
| Programming |
PIC C |
| Programming Tools |
Microchip MPLAB IDE or easyC |
| Erase/Write Cycles |
100,000 |
| Data Retention |
> 40 years |
| General Features |
| Size (W x L x H) |
4.5" x 3.9" x 1.1" |
| Weight |
0.28 lbs. |
| Battery |
7.2V Rechargeable Nickel Cadmium batteries - NiCd |
| Charging |
Recharge when battery voltage < 7.1V, full charge 7.8V typical |
| Battery |
7.2V Rechargeable Nickel Cadmium batteries - NiCd |
| Current Draw |
62 mA - Controller & Receiver min, 5mA to 2A per Motor, 20mA to 1.5 A per Servo |