4 layers64 × 88.6 mm
SF500
jbilander/SF500
Spitfire 500, A low-end 14 MHz Accelerator with IDE and 4/8 MB fast RAM for the Amiga 500.
52 parts82CC-BY-SA-4.0
2 layers25.4 × 18 mm
A500 IDE LED board
jbilander/A500_IDE_LED_board16Amiga 500 Floppy LED to also Display IDE Activity
- Size
- 25.4 × 18 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 13
- Pads
- 33
- Tracks, vias
- 46, 2
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 9 Mar 2022
- Updated
- 16 May 2022
Overview
A500 IDE LED board is an open-source printed circuit board by jbilander, from the jbilander/A500_IDE_LED_board repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 2-layer board of 25.4 × 18 mm with 10 parts on 13 nets, routed with 46 tracks and 2 vias.
It is built around the 74HCT2G14GW and BC857C. Its parts include 4 connectors, 2 resistors, 1 capacitor, 1 IC and 1 transistor.
Main components
2
74HCT2G14GW
SOT-363-40℃~+125℃ 1.9V~2.1V 1uA 2 3.7V 32ns@4.5V,50pF 4.5V~5.5V 400mV 4mA 4mA 74HCT Noise suppression function Push-pull Schmitt trigger SOT-363 Inverters ROHSNexperiaInverters
BC857C
SOT-23-65℃~+150℃ 1 PNP 100MHz 100mA 15nA 250mV 250mW 420 45V 5V PNP SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
README
README.mdA500_IDE_LED_board
Amiga 500 Floppy LED to Display IDE Activity too
Connect a fly-lead from IDE pin 39 /Active to J4 if U1 (74HCT2G14) is not populated, otherwise to J3
Connect a fly-lead from IDE pin 39 /Active
Video:
https://drive.google.com/file/d/1Ml881xZoqoM8HT1IZ48qTFUnri6tXyhQ/view?usp=sharing
The individual pins in the pin-strip can be moved/pushed flush with the PCB holes before soldering. This is not necessary to do connection wise but it looks kind of nice when the bare pins are about the same length as the keyboard header on the Motherboard:
BOM Rev. A
| Position | Name/Value | Package | Notes |
|---|---|---|---|
| U1 | 74HCT2G14 | TSOP-6 | Dual inverting Schmitt trigger |
| Q1 | BC857 or similar e.g. 2N3906 | SOT-23 | PNP general-purpose transistor |
| R1 | 10k | 1206 | Pull-up resistor |
| R2 | 4.7k | 1206 | Series resistor |
| C1 | 0.1uF = 100nF | 0805 | Decoupling capacitor |
| J1 | PinHeader_1x08_P2.54mm_Vertical | Single row 8pin | Pin 5 is not used and can be removed |
| J2 | PinSocket_1x08_P2.54mm_Vertical | Single row 8pin | |
| J3 | PinHeader_1x01_P2.54mm | Single pin | |
| J4 | PinHeader_1x01_P2.54mm | Single pin |
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | Conn_01x01 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Horizontal | J3, J4 |
| 1 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1 |
| 1 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1 |
| 1 | 4.7k | Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R2 |
| 1 | 74HCT2G14 | Package_SO:TSOP-6_1.65x3.05mm_P0.95mm | U1 |
| 1 | BC857C | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Conn_01x08 | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | J2 |
| 1 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J1 |
The 9 most common of 10 parts.
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Questions
How big is the A500 IDE LED board PCB?
It measures 25.4 × 18 mm and has 2 copper layers, 1.6 mm thick.
What parts does the A500 IDE LED board use?
10 parts, built around the 74HCT2G14GW and BC857C. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the A500 IDE LED board KiCad files?
From the jbilander/A500_IDE_LED_board repository on GitHub, at the commit this page was made from: the board is KiCad/A500_IDE_LED_board.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the A500 IDE LED board design in my own project?
Its repository publishes it under the CC-BY-SA-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).