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Tibbo Project System (TPS)
© Tibbo Technology Inc.
Pins on the M2 section have the standard positioning, except that not all pins 1-11
might be present, because the
sections of hybrid devices are
interconnected directly.
Tibbit Power Lines
that the main supply voltage for Tibbits is +5V, and that some
Tibbits also need +15V and -15V power. You also know that
standard ground and +5V pins, while
do not have a provision for -15V power.
Finally, you know that some Tibbits
do not require
any power. This section
continues with the explanation of Tibbit power lines.
The diagram above shows five Tibbits. Two of them are
one is
(four-line RS232 port), another one is
the last one is
Notice how all five Tibbits have diodes in their power lines. On power consuming
Tibbits (#01, #13) these diodes prevent damage to Tibbits if power is accidentally
applied in reverse. On power generating Tibbits (#10, #12) the diodes allow you to
bank power sources. By having two power supply Tibbits (#10) you can either
combine their current output or increase reliability (by having several redundant
power sources).
Power, of course, can also be applied to the power rails externally (i.e. from a lab
power supply). Our own
boards have power terminals for direct 5V
power input. The boards do not have direct inputs for +15V and -15V. So, although
TPP2 and TPP3 have +15V and -15V power rails, the only way to have power on
them is to insert the
. You only have to do it if there are any Tibbits in
your system that require these optional voltages. On the above diagram, Tibbit #13
does r/-15V.
One additional point. Power supply Tibbits that p5V power generate it from
external power sources. For example, Tibbit
takes DC input in the 9-18V range,
while Tibbit
implements PoE (power-over-Ethernet) power supply. Both take
external power and convert it into +5V. Tibbit
, however, gen15/-15V
voltages form the 5V power rail.