Zx spectrum amplifier
About the Zx spectrum amplifier PCB
Zx spectrum amplifier is an open source PCB design by zxinfo-diy-electronics, published on GitHub. It is a 2-layer board measuring 63.2 × 50.3 mm, with 14 components from 13 distinct parts.
Other key parts include the LM386. By type, the board carries 5 connectors, 5 capacitors, 1 IC and 1 resistor.
It belongs with the audio, test & measurement and retro computing designs in this gallery.
From the project
DIY Amplifier for ZX Spectrum published in Ny Elektronik 1984 issue 3 page 47
First version of PBC was done by manually layout of tracks, according to the original component layouts from the magazine
For the track layout, I decided to go with the autoroute plugin - as it makes a nice layout and makes a double sidded print as well.
The new PCB is adjusted to fit in a box of size 84mm X 56mm X 20mm. For example this enclosure box from Hammond
Main components on the Zx spectrum amplifier
Zx spectrum amplifier bill of materials (BOM)
14 components, 13 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM386 | DIP-8_W7.62mm | IC1 |
| 1 | 9V DC(in) | BarrelJack_GCT_DCJ200-10-A_Horizontal | J1 |
| 1 | Input (MIC) | 3.5mm mono jack chassis with switch | J2 |
| 1 | 9V DC(out) | PinHeader_1x02_P2.54mm_Horizontal | J3 |
| 1 | 4.7K | Potentionmeter | P1 |
| 1 | 50K | Potentiometer_Piher_PT-10-V10_Vertical | P2 |
| 1 | Speaker | PinHeader_1x02_P2.54mm_Horizontal | HT1 |
| 1 | Output (MIC) | PinHeader_1x02_P2.54mm_Horizontal | MIC1 |
| 1 | 4,7 nF | C_Disc_D7.5mm_W5.0mm_P7.50mm | C1 |
| 2 | 22 uF | CP_Radial_D5.0mm_P2.50mm | C2, C3 |
| 1 | 100 uF | CP_Radial_D5.0mm_P2.50mm | C4 |
| 1 | 0,1 uF | CP_Radial_Tantal_D4.5mm_P2.50mm | C5 |
| 1 | 10 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
Zx spectrum amplifier design files
The KiCad project lives in the zxinfo-diy-electronics/zx-spectrum-amplifier repository on GitHub; these links point at the commit this page was built from.
- LayoutZX Spectrum AMP.kicad_pcb
- SchematicZX Spectrum AMP.kicad_sch
Zx spectrum amplifier: common questions
How big is the Zx spectrum amplifier PCB?
The Zx spectrum amplifier measures 63.2 × 50.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Zx spectrum amplifier?
14 components, from 13 distinct parts. The full bill of materials is listed on this page.
Where can I download the Zx spectrum amplifier design files?
From the zxinfo-diy-electronics/zx-spectrum-amplifier repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Zx spectrum amplifier design in my own project?
The repository has no license, so all rights stay with zxinfo-diy-electronics. Use it as a reference, and ask the author before reusing the design.
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