The components used on the TAP-28 are pretty common and have standard mounting configurations. A wide range of parts may be used. The parts listed below will work with the TAP-28 but may not be the best options for a particular application and may not be the cheapest options. Use this parts locator as a starting point and verify parameters before ordering as errors may occur.
Microcontroller
The TAP-28 will support a variety of 28 pin PICs in a DIP package; the part number will end in /SP for the Microchip SPDIP package. See the supported devices list for some of the microcontrollers that are supported.
New parts are continuously being added to the Microchip product line, so the supported devices list may be incomplete. To determine if a particular part is compatible, compare it against the pin diagram for supported parts.
Devices not shown as being supported may be compatible with the TAP-28 boards except for the mapping of hardware functions to the connectors. If power, /MCLR and oscillator pins are in the placement shown in the supported devices pin diagram, the microcontroller may be used on the TAP-28 board without damage but the hardware functions may not be on the proper connectors.
Supported Devices
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LEDs
T1/3mm LEDs in either vertical or right-angle mount are supported. If the TAP-28 is used in an enclosure, right-angle LEDs and switches can be accessible through an end panel.
Diffused LEDs are suggested as easier on the eyes. Various colors may be used, limited only by the supply voltage to the TAP-28 and the output current available - the maximum allowed current is 25 mA.
Quantity: 4
Digikey
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Mouser
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Jameco
Part Number
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Description |
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Red vertical diffused LED
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Green vertical diffused LED
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Yellow vertical diffused LED
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Red right-angle diffused LED
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Green right-angle diffused LED
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Yellow right-angle diffused LED
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Switches
Vertical
or right-angle switches may be used for S1 and S2. The RESET switch must be a vertical switch.
Right-angle switches are used where the button projects from the edge of the board, and are usually used with a button cap.
The patterns on the board are for standard 6 mm tactile switches made by
a number of vendors. Vertical switches will have 4 leads. Right-angle switches have two leads plus two support pins from the metal
frame.
Click the pictures to the right for an enlarged view.
Digikey
Part Number
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Description |
| SW793-ND |
Vertical switch, button plunger, 260 gr force
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| SW794-ND |
Vertical switch, plunger for cap, 260 gr force
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| SW408-ND |
Right-Angle switch, button plunger, 150 gr force
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| SW410-ND |
Right-angle switch, plunger for cap, 150 gr force
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| SW451-ND |
Cap 4MM Square Black |
| SW252-ND |
Cap 4MM Square Red
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Mouser
Part Number
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Description |
| 604-WP7104SRD/D |
Red vertical diffused LED
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| 604-WP7104GD |
Green vertical diffused LED
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| 604-WP7104YD |
Yellow vertical diffused LED
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| 604-WP934CB/ID |
Red right-angle diffused LED
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| 604-WP934CB/GD |
Green right-angle diffused LED
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| 604-WP934CB/YD |
Yellow right-angle diffused LED
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Jameco
Part Number
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Description |
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Red vertical diffused LED
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Green vertical diffused LED
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Yellow vertical diffused LED
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Red right-angle diffused LED
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Green right-angle diffused LED
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Yellow right-angle diffused LED
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6-Pin Headers
6-pin headers are used for the ICSP, UART and I2C/SPI connectors. Keyed connectors are recommended but standard 0.1" spacing header pins may be used.
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3-Pin Headers
3-pin headers are used for the ICSP, UART and I2C/SPI connectors. Keyed
connectors are recommended but standard 0.1" spacing header pins may be
used.
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