28301 Parallax Inc, 28301 Datasheet - Page 7

• Manufacturer Part Number: 28301
• Description: DAUGHTERBOARD 3PIN I/O MOBO
• Manufacturer: Parallax Inc

Specifications of 28301

• Accessory Type: Daughter Board, Power and I/O Interface
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: MoBoStamp, MoBoProp
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Analog Output
The AVR offers two PWM outputs, which, with filtering, can be converted to an analog voltage. The
Propeller offers duty-cycle outputs, which can also be filtered to yield an analog voltage. The illustrations
below show a couple analog output configurations that yield a 0-5V output:
In each case, the op amp should be selected to accommodate rail-to-rail inputs and outputs.
Specifications
© Parallax, Inc. • PWR-I/O-DB (2006.09.13)
Circuit Board Size
Mounting Hole Centers
External Supply (optional)
+5V Supply from Motherboard (optional)
External device connectors
External Power Connector
DB 5V MB
DB 5V MB
Vin J1
Vin J1
Vdd = 5V
Vdd = 5V
Vdd = 3.3V
1.35” x 1.35”
1.00” square
6 – 9 VDC
4 – 5 VDC
0.025” square headers on 0.1” centers
2.1mm Coaxial
5.1K
10K
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