GD Power Supply Proto

baldengineer·Mega-IIe·kicad files/gd power supply board pcb/gd power supply board pcb.kicad_pcb

GD Power Supply Proto PCB layout, top view — open source board by baldengineer

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About the GD Power Supply Proto PCB

GD Power Supply Proto is an open source PCB design by baldengineer, published on GitHub under the MIT license. It is a 4-layer board measuring 135.2 × 46.8 mm, with 117 components from 56 distinct parts.

Other key parts include the MAX17580, mc34063 and TPS563240DDCR. By type, the board carries 33 capacitors, 25 resistors, 24 test points, 9 diodes, 8 connectors and 8 inductors.

It belongs with the power & battery designs in this gallery.

From the project

Using the Mega II from a IIgs to make a Apple IIe compatible computer: The Mega IIe!

Always-on 5V supply for the RP2040s and USB Switchable 5V for MEGA and other 5V Logic * Switchable +12/-12V for disk drive and slot

Each 5V supply is designed for >1 Amp. The 12V supply was intended to provide at least 1 Amp. In rev1 testing it could provide 1 amp, but only for about 2 minutes. It's steady state max was around 750 mA.

The -12V supply can only provide a few hundred milliamps. However, in my testing other the analog video circuit used it. At most, it would draw 50 mA but usually sat around 10 mA.

GD Power Supply Proto, from the project README — From the project README

Main components on the GD Power Supply Proto

MAX17580 mc34063 TPS563240DDCR

GD Power Supply Proto bill of materials (BOM)

117 components, 56 distinct parts.

Qty	Part	Footprint	Refs
1	MAX17580	DFN-12-1EP_3x3mm_P0.5mm_EP2.05x2.86mm	U1
1	mc34063	SOIC-8_3.9x4.9mm_P1.27mm	U2
2	TPS563240DDCR	SOT-23-6	U3, U4
2	FDS9435A	SOIC-8_3.9x4.9mm_P1.27mm	Q1, Q4
1	BC817	SOT-23	Q2
1	MMBT3906	SOT-23	Q3
1	15V_IN	BarrelJack_Horizontal	J1
1	15V_IN	PinHeader_1x02_P2.54mm_Vertical	J2
1	Edge Connector	12pos-edge-2.54mm	J3
1	-12v_vin	PinHeader_1x02_P2.54mm_Vertical	J4
1	+12v_vin	PinHeader_1x02_P2.54mm_Vertical	J5
1	mega_vin	PinHeader_1x02_P2.54mm_Vertical	J6
1	stb_vin	PinHeader_1x02_P2.54mm_Vertical	J7
1	PWR_Holes	PinHeader_1x02_P2.54mm_Vertical	J8
1	Limit_Jmp	SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm	JP1
1	15V_byp	SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm	JP2
24	TestPoint_Harwin	Harwin-S1751-46-Test-Point	TP1, TP2, TP3, TP4, TP7, TP9, TP10, TP11 +16
1	BZT52C15	D_SOD-123	D1
1	Vin	LED_1206_3216Metric	D2
1	5_STB	LED_1206_3216Metric	D3

Show 36 more

Qty	Part	Footprint	Refs
1	5_Log	LED_1206_3216Metric	D4
1	+12	LED_1206_3216Metric	D5
1	-12	LED_1206_3216Metric	D6
1	SS14	D_SMA	D7
1	1n400x	D_SMA	D8
1	Rev_LED	LED_1206_3216Metric	D9
4	220	L_0603_1608Metric_Pad1.05x0.95mm_HandSolder	FB1, FB2, FB3, FB4
2	68u	L_Taiyo-Yuden_NR-80xx	L1, L2
2	1.5u	L_Bourns_SRP5030T	L3, L4
1	2.2u	C_0603_1608Metric	C1
3	10u	C_0805_2012Metric	C2, C6, C10
1	5.6n	C_0603_1608Metric	C3
4	100n	C_0603_1608Metric	C4, C13, C14, C19
1	22u/16v	C_0805_2012Metric	C5
9	120u	CP_Radial_D8.0mm_P3.80mm	C7, C11, C23, C25, C26, C29, C30, C32 +1
1	470p	C_0603_1608Metric	C8
1	1u	C_0805_2012Metric	C9
5	22u	C_0805_2012Metric	C12, C15, C16, C20, C21
1	22u	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C17
1	100n	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C18
1	1u	C_0603_1608Metric	C22
4	Cdamp	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C24, C27, C28, C31
1	dnp	R_0402_1005Metric	R1
1	10K	R_0805_2012Metric	R2
1	422k	R_0805_2012Metric	R3
4	Rdamp	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R4, R6, R17, R20
2	33k	R_0805_2012Metric	R5, R14
1	100	R_0805_2012Metric	R7
5	R_0805	R_0805_2012Metric	R8, R9, R10, R11, R12
1	47k	R_0805_2012Metric	R13
2	.22	R_0805_2012Metric	R15, R16
1	5.1k	R_0805_2012Metric	R18
1	560	R_0805_2012Metric	R19
1	1k	R_0805_2012Metric	R21
2	73.2k	R_0603_1608Metric	R22, R24
2	10k	R_0603_1608Metric	R23, R25

GD Power Supply Proto design files

The KiCad project lives in the baldengineer/Mega-IIe repository on GitHub; these links point at the commit this page was built from.

GD Power Supply Proto: common questions

How big is the GD Power Supply Proto PCB?

The GD Power Supply Proto measures 135.2 × 46.8 mm, has 4 copper layers and is 1.754327 mm thick.

How many components are on the GD Power Supply Proto?

117 components, from 56 distinct parts. The full bill of materials is listed on this page.

Where can I download the GD Power Supply Proto design files?

From the baldengineer/Mega-IIe repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the GD Power Supply Proto design in my own project?

Yes, under the terms of its MIT license, which baldengineer chose for the repository.

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