28119 Parallax Inc, 28119 Datasheet - Page 114

• Manufacturer Part Number: 28119
• Description: KIT UNDERSTANDING SIGNALS
• Manufacturer: Parallax Inc

Specifications of 28119

• Lead Free Status: Contains lead
• Accessory Type: Oscilloscope
• Interface Type: USB
• For Use With/related Products: BASIC Stamp® 2 and Board of Education
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

P15
√
√
Calibrate your OPTAscope 81M by selecting Calibrate under the File pull down
menu and following the instructions.
Connect the CH1 and CH2 probes as shown in Figure 8-9.
WARNING: The 1.0 µF capacitor can explode if it is connected improperly!
Always disconnect the power before building or modifying circuits. Carefully check the
polarity of the 1.0 µF capacitor. The positive terminal (longer leg) must be connected to a
power source pin and the negative terminal (shorter leg) must be connected to Vss (ground).
220
1 µF
Ω
Vss
Ri
Vss
Vin
Rf
LM358
OPTA
OPTA
OPTA
scope
scope
scope
CH2
CH1
GND
Figure 8-8:
Non-inverting op-
amp circuit
schematic, with
Ri and Rf labels
Note: If using the
HomeWork
Board, leave out
the 220 Ω
resistor. It is
already built into
the board.