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HP 4957A – Part 3
Finishing the repair For finishing everything I have replaced the temporary cap with the exact replacement which is luckily available. The replacement made a calibration…
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HP 4957A – Part 2
Where do we continue? First: the battery The battery in my 4957A was completely empty and had first signs of leakage at some pins. So…
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HP 4957A – Part 1
Uhh not pretty anymore A couple of days ago my 4957A arrived from Frances. It worked for a few minutes until the Schaffer line filter…
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HP 4951C – Part 3
Fixing the signs of time Finally I got everything delivered. A couple of caps, a new, hopefully quieter fan and of course the RIFAs which…
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HP 4951C – Part 2
Hacking Basic I/O Map What you can see in the picture above is my current version of the 4951C I/O map. As you might know,…
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HP 4951C – Part 1
I discovered a new little cutie this time on eBay – a HP4951C. It is a serial protocol analyser from 1985 which can be used…
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Using 3DFinder on a Sorotec machine
What is this about? One of my new addictions based on my woodworking hobby is CNCing. I use a Sorotec CL1007 machine with a QTC…
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SplitFlap Clock – Part I (Electronics)
Using old school split flap display as modern clock What is it Everyone knows the split flap display from old airports or train stations and…
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BottleBoard
Illumination of your bottle collection What is it BottleBoard is an Arduino based shelf with (in my case) 10 slots for bottles or glasses, which…
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DigiClock
What is it The clock is driving three VGA monitors, each of them displaying two digits from the current time. The clock is DCF77 synchronized…
