Electronic

Charts, grid, … All in one page

Index:

References, sources:

Batteries

Voltage Chart

Battery voltage discharge chart

  • battery duty cycle – the load (including duration) the battery is expected to supply
  • cell size – rated capacity of the battery
  • equalizing charge – prolonged charge, at a rate higher than the normal float voltage
  • full float operation – operation with the batteries and load connected  in parallel
  • period – time during which load is expected to be constant during sizing calculations
  • rated capacity – capacity of the battery cell (usually for a given discharge rate and end of cell voltage)
  • valve-regulated lead-acid (VRLA) cell – sealed lead-acid cell (with the exception of a valve that opens when the internal pressure exceeds the external pressure)
  • vented battery – battery in which the products of electrolysis and evaporation are allowed to escape freely to the atmosphere

Wires

Wire Selection Diameter Chart

AWG (American Wire Gauge) diameter of elctrical wires

WIRE SIZE (AWG) WIRE DIA. INCHES WIRE DIA. mm AREA, CIRCULAR MILLS FT/OHMS (Standard Annealed Copper )
40 0.003 0.08 . .
38 0.004 0.10 . .
36 0.005 0.13 . .
34 0.006 0.16 . .
32 0.008 0.20 . .
30 0.010 0.26 . .
28 0.013 0.32 . .
26 0.016 0.41 . .
24 0.020 0.51 . .
22 0.025 0.64 642.4 61.95
20 0.032 0.81 1,022 98.5
18 0.040 1.02 1,624 157
16 0.051 1.29 2,583 249
14 0.064 1.63 4,107 396
12 0.080 2.05 6,530 630
10 0.102 2.59 10,380 1,001
8 0.129 3.26 16,510 1,592
6 0.162 4.12 26.250 2,531
4 0.204 5.19 41,740 4,025
2 0.258 6.54 66,370 6,400
1 0.289 7.35 . .
1/0 0.324 8.25 105,500 10,180
2/0 0.365 9.27 133,100 12,830
3/0 0.410 10.40 167, 800 16,180
4/0 0.460 11.68 211,600 20,400
250MCM 0.500 12.70 . .
300MCM 0.540 13.72 . .
350MCM 0.590 14.99 . .
400MCM 0.630 16.00 . .
500MCM 0.700 17.78 . .
 

Resistors

Diagram of resistors colors meaning.

Gpio

Gpio 40 pins colored with names and numbers

Cross Reference AWG to MM2

AWG mm2
30 0.05
28 0.08
26 0.14
24 0.25
22 0.34
21 0.38
20 0.50
18 0.75
17 1.0
16 1.5
14 2.5
12 4.0
10 6.0
8 10
6 16
4 25
2 35
1 50
1/0 55
2/0 70
3/0 95
4/0 120
300MCM 150
350MCM 185
500MCM 240
600MCM 300
750MCM 400
1000MCM 500

Crimp Gauge

NOTE: FACTIONAL NUMBERS INDICATE CRIMPED RING TERMINALS – DECIMALS INDICATED SOLDER DIPPED AND PUNCH.
CRIMPS FOR STUD SIZES RING TERMINAL TC NPC NPS AVAILABLE PUNCH SIZES FOR TYPES “A” & “D” Attn: These are hole sizes – one size over stud size recommended.
. . . . . .062  (1/16)
. . . . . .078  (5/64)
. . . . . .093  (3/32)
#4 YES YES . . .109  (7/64)
. . . . . .125  (1/8)
#6 YES YES YES YES .140  (9/64)
.. . .. .. . .156  (5/32)
#8 YES YES YES YES .171  (11/64)
. . . .187  (3/16)
#10 YES YES YES YES .203  (13/64)
. . . . . .218  (7/32)
. . . . . .234  (15/64)
. . . . . .250  (1/4)
1/4 YES YES YES  YES .265  (17/64)
. . . . . .281  (9/32)
. . . . . .296  (19/64)
. . . . . .312  (5/16)
5/16 YES YES YES YES .328  (21/64)
. . . . . .343  (11/32)
. . . . . .359  (23/64)
. . . . . .375  (3/8)
3/8 YES YES YES YES .390  (25/64)
. . . . . .406  (13/32)
. . . . . .421  (27/64)
. . . . . .437  (7/16)
7/16 YES YES . . .453  (29/64)
. . . . . .468  (15/32)
. . .484  (31/64)
1/2 YES YES .. .. .500  (1/2)
5/8 YES YES . . NOT AVAILABLE
3/4 YES YES . . NOT AVAILABLE
7/8 YES YES . . NOT AVAILABLE