Add generic 555 Symbol (draft)

Sources/geda/555_generic.sym

+v 20181211 2
+B 300 300 3500 3500 3 10 1 0 -1 -1 0 -1 -1 -1 -1 -1
+P 4100 2100 3800 2100 1 0 0
+{
+T 3800 2150 5 10 0 0 0 6 1
+pintype=oc
+T 3742 2092 9 10 1 1 0 6 1
+pinlabel=OUTPUT
+T 3892 2142 5 10 1 1 0 0 1
+pinnumber=3
+T 3800 2150 5 10 0 0 0 6 1
+pinseq=3
+}
+P 0 3400 300 3400 1 0 0
+{
+T 100 3450 5 10 0 0 0 0 1
+pintype=pas
+T 358 3392 9 10 1 1 0 0 1
+pinlabel=DISCHARGE
+T 208 3442 5 10 1 1 0 6 1
+pinnumber=7
+T 100 3450 5 10 0 0 0 0 1
+pinseq=7
+}
+P 0 2100 300 2100 1 0 0
+{
+T 100 2150 5 10 0 0 0 0 1
+pintype=in
+T 100 2150 5 10 0 0 0 0 1
+pinseq=6
+T 358 2092 9 10 1 1 0 0 1
+pinlabel=THRESHOLD
+T 208 2142 5 10 1 1 0 6 1
+pinnumber=6
+}
+P 0 600 300 600 1 0 0
+{
+T 100 650 5 10 0 0 0 0 1
+pintype=in
+T 100 650 5 10 0 0 0 0 1
+pinseq=2
+T 358 592 9 10 1 1 0 0 1
+pinlabel=\_TRIGGER\_
+T 208 642 5 10 1 1 0 6 1
+pinnumber=2
+}
+P 2800 0 2800 300 1 0 0
+{
+T 2750 100 5 10 0 0 90 0 1
+pintype=io
+T 2750 100 5 10 0 0 90 0 1
+pinseq=5
+T 2808 358 9 10 1 1 90 0 1
+pinlabel=CONTROL_VALUE
+T 2758 208 5 10 1 1 90 6 1
+pinnumber=5
+}
+P 1800 0 1800 300 1 0 0
+{
+T 1750 100 5 10 0 0 90 0 1
+pintype=pwr
+T 1750 100 5 10 0 0 90 0 1
+pinseq=1
+T 1808 358 9 10 1 1 90 0 1
+pinlabel=GND
+T 1758 208 5 10 1 1 90 6 1
+pinnumber=1
+}
+P 1800 4100 1800 3800 1 0 0
+{
+T 1850 4000 5 10 0 0 270 0 1
+pintype=in
+T 1850 4000 5 10 0 0 270 0 1
+pinseq=4
+T 1792 3742 9 10 1 1 270 0 1
+pinlabel=\_RESET\_
+T 1842 3892 5 10 1 1 270 6 1
+pinnumber=4
+}
+P 2800 4100 2800 3800 1 0 0
+{
+T 2850 4000 5 10 0 0 270 0 1
+pintype=pwr
+T 2850 4000 5 10 0 0 270 0 1
+pinseq=8
+T 2792 3742 9 10 1 1 270 0 1
+pinlabel=VDD
+T 2842 3892 5 10 1 1 270 6 1
+pinnumber=8
+}
+T 1392 2492 5 16 1 1 0 0 1
+device=CMOS-555
+T 1292 2292 8 10 0 1 0 0 1
+description=CMOS "555" Timer IC
+T 292 3889 5 10 1 1 0 0 1
+refdes=U?
+T 1892 1392 8 10 0 0 0 0 1
+footprint=none