28128 Parallax Inc, 28128 Datasheet - Page 96

• Manufacturer Part Number: 28128
• Description: KIT BASIC ANALOG/DIGI PARTS ONLY
• Manufacturer: Parallax Inc

Specifications of 28128

• Accessory Type: ADC, DAC
• Product: Microcontroller Accessories
• For Use With/related Products: BASIC Stamp® 2 and Board of Education
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Questions
Challenge!
1. “1101” is what value in the decimal number system? What voltage would you
2. What function is provided by a D/A converter?
3. What are some of the advantages and disadvantages of the resistive ladder
4. Why does the D/A voltage “jump” from one value to another, unlike the voltage
5. How does the voltage follower solve the output voltage range problem when the
1. Create an 8 bit “resistive ladder” D/A converter. Draw the complete schematic.
2. Write a program that will step through 256 different analog voltages. Each
expect from the D/A converter output if you sent it this binary number?
network?
available on a pot?
D/A converter’s output is connected to the LED circuit’s input?
voltage should be present for 100 milliseconds on the voltmeter.