28128 Parallax Inc, 28128 Datasheet - Page 17

• 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

Figure 1-6 also shows some samples of 5 socket wide rows that are electrically connected
underneath the breadboard. There are 34 of these 5 socket wide rows arranged in the two
columns on the breadboard. If you want to connect two jumper wires to each other, you
can just plug them into the same row of 5. Then the wires are electrically connected.
Likewise, if you want to connect one or more wires to the terminal of a part, just plug
them into the same row on the breadboard and they'll be connected.
Building the Analog and Digital Comparator
Build the circuit according to the schematic in Figure 1-7. This schematic is like a list of
connections between circuit symbols. Try to use this list to build the circuit. Here is a
partial list of the connections shown in the schematic:
Keep following the schematic like a list and you'll have the circuit built in no time.
√
√
√
√
√
The wiper terminal of the 100 k
amp.
Pin 2 of the LM358 is connected to pin 1 of the LM358.
Pin P7 of the BASIC Stamp is connected to the wiper terminal of the pot.
Pin 8 of the LM358 is connected to Vdd on the Board of Education.
Pin 4 of the LM358 is connected to Vss on the Board of Education.
P15
P14
P13
P12
P11
P10
P9
P8
P7
P6
P5
P4
P3
P2
P1
P0
X4
X3
pot is connected to pin 3 of the LM358 op-
Figure 1-6
Board of Education
Circuit Symbols and where
to find them on the Board of
Education. Also shown is
how each row of 5 sockets
on the breadboard is
electrically connected
underneath.