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“Yeah, the LCD is tiny at 2.4”, and the emulation runs about 15% slower than an NTSC C64. But it’s running on a small embedded board that’s available for under $30 US (DigiKey, Mouser, …) including mounted LCD …
“The GeigerMüller counter is a relatively simple tool to measure ionizing radiation. To increase sensitivity, construction presented here contains three (instead of one as usually) soviet STS-5 lamps. This is important for measurements of natural sources of (low) radiation …