# Vitaliy_M

Cool and simple electronics ga
4

## Achievements

• Vitaliy_M followed GreatScottLab1 year ago
• Vitaliy_M followed GreatScottLab1 year ago
• Vitaliy_M followed paewookyung1 year ago
• 1 year ago

Yes it is possible.Need connect 4 contacts.MSP430G2230 PIN | Lanuchpad connector Pin---------------------------|------------------------------DVCC (V+ power) | connect to Launchpad J1 pin 1TEST/SBWTCK | connect to Launchpad J2 pin 17RST/SBWTDIO | connect to Launchpad J2 pin 16DVSS (GND) | connect to Launchpad J2 pin 20I have used the board to make the programmer.Please refer to the attached drawing

• 1 year ago

Now I understand. You're talking about the first picture where the PCB with components.You're right, R1, R2, R3 resistors marked by 150. It's really a bit confuses.It is called 3 figure SMT resistor code system. It's simple: the first two numbers will indicate the significant digits, and the third will be the multiplier. Please see example:

Now I understand. You're talking about the first picture where the PCB with components.You're right, R1, R2, R3 resistors marked by 150. It's really a bit confuses.It is called 3 figure SMT resistor code system.It's simple: the first two numbers will indicate the significant digits, and the third will be the multiplier. Please see example:

The resistors are 15 ohms.The current limiting resistor value calculated using the next formula:R = (Vs-Vf)/IVs = Supplay Voltage (Battery 3V)Vf = LED forward voltage drop in Volts (found in the LED datasheet actually it very close to 3V, but let take it 2.9V)I = LED forward current in Amps (found in the LED datasheet and can be 10 - 30mA, but the Micro-controller pin Iout max = 8mA)R = (3-2.9)/0.008 = 12.5ohmsBut real I measured on LEDs around 3-4mA

It was a real pleasure for me to do it!