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Divergence Meter - ZPUA UBZ-1 Relay & Contactor Tester
An unusual digital test equipment from the '70s/'80s Poland. Really well made, and just look at all those LC-513 goodness! Reverse-engineered by yours truly, and now I'm walking you through its internals. It's not the only episode I'll have about it, because I haven't demonstrated it on an actual relay - but there'll be more. Including some additional use cases like measuring the retraction time of a relay being switched off.
0:00 Intro
2:00 Meter Outside
5:25 Taking It Apart
6:30 Nixies and Connections
7:15 Counters and BCD Decoders/Drivers (Keri Out!)
8:40 Control Logic
10:18 Isostat Switches
11:30 Relay Control Part - Two SCRs
13:15 Power Supply
14:23 Reverse-Engineering and Schematics
15:00 Counter/Decoder/Display Part and Reset Logic
18:00 Oscillator and Frequency Dividers
19:12 Contact Latching
23:40 Start/Stop and Solenoid Control Logic
26:47 On-Off SCR Relay Control Circuit
28:38 Power Supply Circuit
30:05 Quick Demo
32:20 Afterword
A bit perplexed by those flip-flops for sure!
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics or via PayPal https://paypal.me/keritech
Instagram - https://www.instagram.com/KeriSzafir
Hackaday - https://hackaday.io/keritech
#ElectronicsCreators #Keritech #Electronics
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An unusual digital test equipment from the '70s/'80s Poland. Really well made, and just look at all those LC-513 goodness! Reverse-engineered by yours truly, and now I'm walking you through its internals. It's not the only episode I'll have about it, because I haven't demonstrated it on an actual relay - but there'll be more. Including some additional use cases like measuring the retraction time of a relay being switched off.
0:00 Intro
2:00 Meter Outside
5:25 Taking It Apart
6:30 Nixies and Connections
7:15 Counters and BCD Decoders/Drivers (Keri Out!)
8:40 Control Logic
10:18 Isostat Switches
11:30 Relay Control Part - Two SCRs
13:15 Power Supply
14:23 Reverse-Engineering and Schematics
15:00 Counter/Decoder/Display Part and Reset Logic
18:00 Oscillator and Frequency Dividers
19:12 Contact Latching
23:40 Start/Stop and Solenoid Control Logic
26:47 On-Off SCR Relay Control Circuit
28:38 Power Supply Circuit
30:05 Quick Demo
32:20 Afterword
A bit perplexed by those flip-flops for sure!
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics or via PayPal https://paypal.me/keritech
Instagram - https://www.instagram.com/KeriSzafir
Hackaday - https://hackaday.io/keritech
#ElectronicsCreators #Keritech #Electronics