Ice Tube clock - boost conv. HF ripple
Ice tube clock HV ripple
Ice Tube clock - boost conv. ripple
Ice Tube clock - parts 1/2
Ice Tube clock - VFD macro
Ice Tube clock - VFD macro
Ice Tube clock - VFD macro
Ice Tube clock - VFD macro
Ice Tube clock - VFD macro
Ice Tube clock - VFD macro
Ice Tube clock - VFD macro
Ice Tube clock - VFD macro
Ice Tube clock - VFD macro
Ice Tube clock - VFD macro
Ice Tube clock - VFD macro
Ice Tube clock - VFD tube
Ice Tube clock - VFD tube
Ice Tube clock - VFD tube
Ice Tube clock - VFD tube
Ice Tube clock - VFD tube
Ice Tube clock - VFD tube
Ice Tube clock - VFD soldered
Ice Tube clock - VFD soldered
Ice tube clock quartz
Ice tube clock boost converter
Ice Tube clock - PCBs 1/2
Ice Tube clock - PCBs 2/2
Ice Tube clock - parts 2/2
Ice Tube clock - voltage reg. 1
Ice Tube clock - voltage reg. 2
Ice Tube clock - voltage reg. 3
Ice Tube clock - buzzer 1
Ice Tube clock - buzzer 2
Ice Tube clock - buzzer 3
Ice Tube clock - boost conv. 1
Ice Tube clock - boost conv. 3
iIce Tube clock - boost conv. 4
Ice Tube clock - boost conv. 2
Ice Tube clock - VFD driver socket
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Ice Tube clock - boost conv. voltage
55.2V DC coming from the open loop boost converter. I still wonder how this can provide a stable voltage without any load attached. Theoretically the inductor should charge the capacitor more and more if it is constantly switched.
Adafruit recommends to wait a few minutes after testing the step-up converter before going on with the build process. This can be sped up by bleeding the capacitor with your finger across its pins _after unplugging_ the power supply. Skin surface resistance is low enough to make that work. This shouldn't be considered "best practices", but here it is safe enough. Using a 10k resistor to 'short' the capacitor works as well. Don't do this if you're poking around inside something with real high voltages (e.g. old TV sets with several kV).
Adafruit recommends to wait a few minutes after testing the step-up converter before going on with the build process. This can be sped up by bleeding the capacitor with your finger across its pins _after unplugging_ the power supply. Skin surface resistance is low enough to make that work. This shouldn't be considered "best practices", but here it is safe enough. Using a 10k resistor to 'short' the capacitor works as well. Don't do this if you're poking around inside something with real high voltages (e.g. old TV sets with several kV).
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