555 Timer

GND 1 -555-
-
XX-
8 VCC
TRIGGER 2 7 DISCHARGE
OUTPUT 3 6 THRESHOLD
RESET 4 5 CONTROL VOLTAGE
Pin Names and functions
Vcc Power (4V5 to 16V DC)
TRIGGER Falling edge
OUTPUT Active high
RESET Active low
CONTROL VOLTAGE Connects to decoupling capacitor normally
THRESHOLD Connects to timing capacitor
DISCHARGE Active low
GND Ground

Work in progress, needs checking..