Assembling the Slogger Pegasus 400 Disc Interface for the Acorn Electron
Another in the series of building add-ons for the Acorn Electron, this time it's the Slogger Pegasus Disc Interface. I discussed on my page My Acorn Revival from 2019 how I bought an original Slogger Pegasus PCB and had to thoroughly check the board before assembly which led me onto making my own boards. Since then a new version has been released by Retro Hardware which has made some improvements and changes to the original. I had only made a few minor alterations on my version, moving a couple of IC's to improve access to a mounting hole and to make the SRAM socket compatible with both 8K and 32K chips.The changes on V1.1 are:
Repositioning the IC's again to give even better access to the mounting hole.
Added more decoupling capacitors.
Repositioned the links, I had inadvertantly moved them closer to the disc controller IC.
Changed the 7416 buffer IC for a ULN2003A - Cheaper and easier to obtain.
Further changes may appear in the future to simplify and reduce the IC count.
Below is a series of photos I took when assembling the 1V1 PCB. I started with looking out the components needed and started to solder the resistors and sockets only to find I was three sockets short. I continued with the assembly while waiting for the sockets to arrive by soldering in the SIL resistor, the decoupling capacitors, the links, disc drive header and plugged in what IC's I could. When the sockets arrived it allowed the completion of the board. I then mounted the PCB in its case completing the build.
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The bare board and mounting the first components.
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Continuing with the SIL resistor, capacitors, links and drive header.
![](/Slogger/s_05_Slogger_Pegasus_assembly.jpg)
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IC's plugged in and fitting the last three IC sockets.
![](/Slogger/s_07_Slogger_Pegasus_assembly.jpg)
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Assembling the case and mounting the board inside.