Simple STM8 library was written to drive this IGT1-203 display panel. It uses one ADC channel, TIM4 scan timer and embedded IDWG watchdog for better stability.
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Sunday, August 6, 2017
IGT1-203 Self Scan bar graph display
Another bunch arrived on my workbench, my recent eBay purchase, IGT1-203 plasma bar graph display. This is single channel self scan plasma display with a working principle similar to PBG12201 panel indicator (Love that glow in the dark!). IGT1-203 has 5 scan cathodes, one reset segment/cathode, one anode for linear control, and two keep-alive pins.
Simple STM8 library was written to drive this IGT1-203 display panel. It uses one ADC channel, TIM4 scan timer and embedded IDWG watchdog for better stability.
Schematic is pretty simple:
Simple STM8 library was written to drive this IGT1-203 display panel. It uses one ADC channel, TIM4 scan timer and embedded IDWG watchdog for better stability.
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ReplyDeleteCan you tell me what power rating you used on resistors R50 (for the 68V) R45 and R47 (For the Anode drive)?
ReplyDeleteI ended up changing the resistor/zener combination for a high voltage regulator (LR8) as R50 was getting very warm.
For R45and R57, even with 5W parts - things were still on the warm side.
Interestingly I see your schematic shows R50 as 150K, the schematic I found had it at 33K - that could be my problem there!
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