SparkFun Forums

[coyote20000]

Just wondering what questions everyone got?
'going by memory' - so don't quote me..

1. In an ADC @ 10 bit resolution, if vref is 3.3v and 2.2v is on the input what is the ADC conversion.

2. "voltage divider"

3. "Hex to Binary conversion"

4. "~b011001100"

[Stephanie]

1) the voltage divider one
2) convert hex to binary
3) how to use an IC on a breadboard

The contest ended before I could submit on #3, so that's all I got.

[Yogi Bear]

Not in order.
Q: SOIC MAX232 Digi-Key part #?
A:MAX232C??+-ND Something something
Q:470Ohm pull up is a?
A:strong pullup
Q:0b01001100 is what in hex?
A:0x4C
Q:9600N1 at rs232 level is what after conversion to TTL
A:9600N1
Q:Value for a current limiting resistor with Vf=3V and current 20mA, supply 5V
A:100Ohm
Q:0b10010100 is what in dec
A:148
Q:10 bit AD with ref 3.3V reads 362, what is the input voltage.
A:1.166V
Q:Something about a voltage divider
A:Don't remember?
Q:Breadboard power strips are called what?
A:Breadboard power strips
Q:Absolute maximum input for ADXL with VDDIO 2.0V
A:2.3V

[Valen]

1st question: Convert (100)base2 into decimal: Answer=4

Lady Fortune smiled upon me by blocking the packets with my initial answer (8). I wasn't thinking straight. I thought, 3 bits, that's got to be 8. Because 3 bits make 8 possible values including '0'. But before 100b comes 11b which is 3 in decimal. And

1x2^2+ 0x2^1 + 0x2^0 = 2^2 which is obviously 4

So I'm very glad I had the chance to correct myself. Or else I'd have gotten nothing.

2nd question: What voltage comes out between 2 resistors of 1kohm set up in series as a voltage divider that is powered with 5 volt. Answer: 2.5 volt.

This answer never got through. So I don't know about the other 8.