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> Basic stamp or BX24 protoboard (assembled)
Basic stamp or BX24 protoboard (assembled)
Give some permanence to your creative Basic Stamp and BX24 designs.
This is not a kit. It is fully assembled.
* Standard RS232 interface for programming either a Basic Stamp 2 or NetMedia BX24.
* Hefty 7805 voltage regulator to safely power the Stamp and peripheral circuitry.
* Dimensions of the board are 4.0 X 3.19 X 0.062
* Pads next to all Stamp terminals
* Plated holes on 0.1 in grid.
* Mounting holes - clearance for #4 screws.
* Additional holes for mount a 2X16 LCD on spacers if desired.
* Power requirement is 8-15 VDC. The connector is 2.1 mm ID x 5.5 mm OD, female, center positive.
There is a design deficiency associated with similar boards sold by Parallax and NetMedia. These designs feed V_power (7 to 12 VDC) on terminal 24 of the BS2 or BX24 and then use the small regulator on the expensive Stamp to output +5 VDC on terminal 21 to power peripheral circuitry. If you happend to have an accidental short or draw too much current, there is a high probability of blowing the regulator on the BS2 (or BX24). Using the $40 - $50 processor as a 5 VDC voltage regulator is, in my mind, a fatal flaw.
My design uses a hefty 7805 to feed +5 VDC to the BS2 or the BX24 on terminal 21. This also is used to feed +5 VDC to other circuitry. Thus, a short or an overload, will simply heat up the 7805 and the 7805 will shut down. When it cools, it will recycle. But, an accidental short or overload will not damage the BS2 or BX24.
This board may be used with Parallax stamps BS2-IC, BS2E-IC, BS2SX-IC, BS2P24, BS2PE, BasicX BX-24 and BasicAtom24-M.
View of the back of the board.
* Australia, New Zealand - $3.50.
