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Add European standard PCB and reference

Clarissa Walker authored on 2023/06/14 11:27:24
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component-assignments.txt
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@@ -61,7 +61,8 @@ Notes
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 [1] The US standard is preferred, as this board is designed in the US. The
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     European standard may fit, but the installation may be off by ~1.3mm; it
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-    will slightly stick out. An European variant will be created soon.
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+    will slightly stick out. For the European standard, please use the
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+    jtag-wiggler_euro PCB.
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     US standard
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     board edge to nearest pin line: ~8.08mm
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Specify SW1 as 'Sub-miniature DPDT switch'

Clarissa Walker authored on 2023/06/09 02:55:45
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component-assignments.txt
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@@ -36,7 +36,8 @@ R19 - 1/4W resistor, 330 to 5K1 (VREF LED current limiter) [4]
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 Dual Power Supply Section
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 J2 - Barrel Jack, 5.5mm x 2.1mm, female, 3 prong (VCC)
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-SW1 - DPDT ON-ON switch, 2.54mm pin spacing (3V3/5V0 power switch)
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+SW1 - Sub-miniature DPDT ON-ON switch, 2.54mm x 5.08mm pin spacing (3V3/5V0
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+  power switch)
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 U2 - LM1117T-ADJ or LD1117 LDO regulator (3V3 power supply)
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 U3 - LM1117T-ADJ or LD1117 LDO regulator (5V0 power supply)
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 D2 - 5mm LED, Green (3V3 power indicator)
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Initial commit

Clarissa Walker authored on 2023/06/08 01:19:16
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component-assignments.txt
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+Layout - Component Assignments
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+
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+--
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+
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+JTAG Section
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+
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+J1 - DSUB-25 Connector, Right Angle, Male [1]
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+P1 - 2 pin header
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+P2 - 3 pin header
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+P3 - 8 pin header
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+U1 - 74HCT244 octal buffer/line driver [2]
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+Q1 - 2N3904 transistor [3]
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+D1 - 5mm LED, Yellow (VREF power indicator)
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+C1 - Ceramic or Film cap, 100nf (output voltage filter)
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+R1 - 1/4W resistor, 10K (to 2N3904, base)
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+R2 - 1/4W resistor, 100 (to 74HCT244, 1A0)
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+R3 - 1/4W resistor, 100 (to 74HCT244, 1A1)
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+R4 - 1/4W resistor, 100 (to 74HCT244, 1A2)
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+R5 - 1/4W resistor, 100 (to 74HCT244, 1A3)
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+R6 - 1/4W resistor, 100 (from 74HCT244, 2Y0)
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+R7 - 1/4W resistor, 47K (to 2N3904, base to emitter ground)
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+R8 - 1/4W resistor, 2K2 (TMS power tap, current limiter)
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+R9 - 1/4W resistor, 2K2 (TCK power tap, current limiter)
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+R10 - 1/4W resistor, 2K2 (TDI power tap, current limiter)
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+R11 - 1/4W resistor, 2K2 (nTRST power tap, current limiter)
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+R12 - 1/4W resistor, 100 (from 2N3904, collector to nSRST)
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+R13 - 1/4W resistor, 100 (to 74HCT244, 2A0, TDO)
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+R14 - 1/4W resistor, 100 (from 74HCT244, 1Y3, nTRST)
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+R15 - 1/4W resistor, 100 (from 74HCT244, 1Y2, TDI)
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+R16 - 1/4W resistor, 100 (from 74HCT244, 1Y1, TCK)
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+R17 - 1/4W resistor, 100 (from 74HCT244, 1Y0, TMS)
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+R18 - 1/4W resistor, 1K (nSRST pullup resistor)
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+R19 - 1/4W resistor, 330 to 5K1 (VREF LED current limiter) [4]
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+
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+
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+Dual Power Supply Section
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+
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+J2 - Barrel Jack, 5.5mm x 2.1mm, female, 3 prong (VCC)
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+SW1 - DPDT ON-ON switch, 2.54mm pin spacing (3V3/5V0 power switch)
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+U2 - LM1117T-ADJ or LD1117 LDO regulator (3V3 power supply)
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+U3 - LM1117T-ADJ or LD1117 LDO regulator (5V0 power supply)
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+D2 - 5mm LED, Green (3V3 power indicator)
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+D3 - 5mm LED, Red (5V0 power indicator)
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+D4 - DO-41 diode, 1N4004 to 1N4007 (protection diode)
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+C2 - Electrolytic cap, 100uf 16V (3V3 power supply in filter)
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+C3 - Electrolytic cap, 100uf 6.3V (3V3 power supply adj to out filter)
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+C4 - Electrolytic cap, 100uf 6.3V (3V3 power supply out filter)
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+C5 - Electrolytic cap, 100uf 16V (5V0 power supply in filter)
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+C6 - Electrolytic cap, 100uf 6.3V (5V0 power supply adj to out filter)
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+C7 - Electrolytic cap, 100uf 6.3V (5V0 power supply out filter)
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+R20 - 1/4W resistor, 330 (3V3 power supply adj)
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+R21 - 1/4W resistor, 200 (3V3 power supply out)
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+R22 - 1/4W resistor, 330 to 5K1 (3V3 LED current limiter) [4]
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+R23 - 1/4W resistor, 680 (5V0 power supply adj)
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+R24 - 1/4W resistor, 220 (5V0 power supply out)
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+R25 - 1/4W resistor, 330 to 5K1 (5V0 LED current limiter) [4]
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+
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+
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+Notes
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+
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+[1] The US standard is preferred, as this board is designed in the US. The
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+    European standard may fit, but the installation may be off by ~1.3mm; it
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+    will slightly stick out. An European variant will be created soon.
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+
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+    US standard
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+    board edge to nearest pin line: ~8.08mm
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+    board edge to mounting hole: ~9.50mm
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+
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+    European standard
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+    board edge to nearest pin line: ~9.40mm
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+    board edge to mounting pin: ~11.80mm
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+
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+[2] You can also use the HC variant, but HCT is recommended. You're also better
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+    off socketing this IC!
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+
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+[3] 2N3904 NPN transistor is from the original alec @ sensi.org schematic. It
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+    is US-centric, however. The onetransistor.eu schematic uses the BC548 due
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+    to the schematic's European origin. To install the BC548 NPN transistor, it
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+    must be installed backward in comparison to its 2N3904 cousin.
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+
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+    However, the other European BC547 is exactly pin-to-pin compatible to the
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+    2N3904, so backwards installation is not necessary.
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+
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+    2N3904, 2N2222, BC547 = EBC
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+    BC548, BC337 = CBE
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+
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+[4] LED brightness. The higher value the resistor is, the lower the LED's
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+    brightness is. Notice R20 is separate from these resistors. Do NOT change
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+    this particular resistor unless you know what you are doing, as it affects
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+    the set voltage from 3V3!
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