reference

reference

QT113(Qprox Sensor)

RS232 : Interface between a terminal (DTE : Data Terminal Equipment) to a modem (DCE : Data Communications Equipment) Employing Serial Binary Data Interchange (for the transfer of serial data) .

http://www.ctips.com/rs232.html

http://www2.rad.com/networks/1995/rs232/rs232.htm

Search results -RS232

more google search

DM74LS47N

http://www.fairchildsemi.com/ds/DM/DM74LS47.pdf

http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=333136&e_categoryid=97&e_pcodeid=512K

LM555
Single Timer( LM555CN - Timer) .... BASIC Stamps 과 무슨 관계가 있는 듯...

General description : The LM555/NE555/SA555 is a highly stable controller capable of producing accurate timing pulses. With monostable operation, the time delay is controlled by one external resistor and one capacitor. With a stable operation, the frequency and duty cycle are accurately controlled with two external resistors and one capacitor.

Applications :

Precision Timing
Pulse Generation
Time Delay Generation
Sequential Timing

http://www.futurlec.com/Linear/LM555CNpr.shtml

http://www.fairchildsemi.com/pf/LM/LM555.html

SN74LS193N

PRESETTABLE BCD/DECADE UP/DOWN COUNTER PRESETTABLE 4-BIT BINARY UP/DOWN COUNTER

http://www.chipdocs.com/pndecoder/datasheets/ON/SN74LS193N.html

http://www.americanmicrosemi.com/products/specs/SN74LS193N.phtml

AMS parts specifications catalog

Digital ICS ≫ Counters ≫ Binary; 4-Bit; Up/Down
Part Number DM74LS193N
Generic Number
Military/High-Rel N
Tech. TTL
Maxumim Modulus 16
Circuits Per Package 1
Preload (Y/N) Yes
f(oper) Max. (Hz) 25M
Nom. Supp Volt 5.0
Minimum Operating Temp (шC) 0
Maximum Operating Temp (шC) 70
Output Config
Package Style DIP
Mounting Style T
Pinout Equivalence Code 16-445
# Pins 16