DATAMATH CALCULATOR MUSEUM

Texas Instruments PS-2100

Date of introduction:	1992	Display technology:	LCD
New price:		Display size:	12 char + 12 digits
Size:	3.4" x 2.1" x 0.2"
Weight:	1.3 ounces	Serial No:
Batteries:	CR2025	Date of manufacture:	mth 10 year 1992
AC-Adapter:		Origin of manufacture:	China (N)
Precision:	10	Integrated circuits:	single-chip
Memories:	2kB RAM
Program steps:		Courtesy of:	Joerg Woerner
		Download manual:	(GER: 830 kB)

The PS-2100 Databank stores 125 names and numbers in a credit card sized housing.

The PS-2100 Databank features 4 useful functions:

	The Telephone Directory stores names and telephone numbers
	The Scheduler stores appointments, meeting times an dreminders
	A flexible clock with 12-hour AM/PM or 24-hour time showing day of week
	A calculator with 10-digits display capacity

The display of the PS-2100 consists of one line for alphanumeric characters and one line supporting only numbers. The PS-2400 packaged the same specifications in a conventional housing with a "qwerty" standard keyboard layout. The later PS-3010 combined the size of a credit card with a full keyboard.

The related IS-2100 PhoneBook combines the PS-2100 with a small booklet.

A blue edition of the PS-2100 was sold with the PS-9250 Data Bank Book.
The PS-2100 roots back to the TI-2100 Pocket Info introduced in the year 1987.

How do you design such a small Databank ?

This is an interesting question - the Databank is only 0.2 inches (5 mm) thick.

This picture gives you the last time a working PS-2100 Databank. The next step will destroy it !
Just after removal of the keyboard foil you'll notice the printed circuit board (PCB) of the PS-2100. The thin foil is one half of the switches, the PCB forms the other half. The later IS-8400 looks similar.
The backside of the PCB gives you just a small blob of epoxy resin on top of the single-chip computer. It seems to be the TMP0620F known from the PS-2400. Find another chip-on-board design here.

If you have additions to the above article please email: joerg@datamath.org.