Eric Fontaine ericfont
ericfont
/ circuit-20260425-0004.svg
Created
April 25, 2026 04:02
tried to improve on Dec 11, 2025 delta + DSM by doing triangles, but failed...better stick to Dec 11 version
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ericfont
/ unicode_roman_music.txt
Last active
April 25, 2026 04:18
unicode roman numerals & musical symbols
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| ↘ U+2198 | |
| ↗ U+2197 | |
| ⁷ U+2077 | |
| · U+00B7 | |
| Ⅰ U+2160 | |
| Ⅱ U+2161 | |
| Ⅲ U+2162 | |
| Ⅳ U+2163 | |
| Ⅴ U+2164 | |
| Ⅵ U+2165 |
ericfont
/ How to transfer from 1cm strips to tokens
Last active
April 19, 2026 23:35
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| use verical only metal strip on the table placed about 1cm. | |
| send the positive signal to every 1st, 5th, 9th, etc strip. | |
| send the negative signal to every 3rd, 7th, 11th, etc strip. | |
| the inbetween 2nd, 4th, 6th, 8th, 10th, etc strips send voltage reference (i.e. ground or 2.5V) | |
| on subsquent phases, increment thoae numbers by 1. | |
| the tokens with have receiver plates (or contacts) on the 6 equidistamt opposite corners. |
ericfont
/ circuit-20260418-2013.svg
Created
April 19, 2026 00:11
test circuit capacitively couple without common ground reference.
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ericfont
/ keyd-unicode-musical-symbols.conf
Last active
March 24, 2026 23:22
keyd unicode musical symbols configuration file for a second USB keyboard
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| [ids] | |
| # put the USB id code of your secondary keyboard to map | |
| # found by running 'sudo keyd monitor' | |
| XXXX:XXXX:XXXXXXXX | |
| [main] | |
| #boxed letters 🅰🅱🅲🅳🅸🆅 | |
| a = macro(C-S-u 1 f 1 7 0 enter) | |
| b = macro(C-S-u 1 f 1 7 1 enter) |
ericfont
/ circuit-20260317-1232.svg
Created
March 17, 2026 16:31
last zero crossing of derivative of peak gives time when peak occurs
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ericfont
/ circuit-20260317-0204.svg
Created
March 17, 2026 06:02
simple passive diode negative and positive peak detector
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ericfont
/ circuit-20260306-1554.svg
Created
March 6, 2026 20:52
run device from solar while only use battery if not enough solar
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ericfont
/ circuit-20260306-0313.svg
Created
March 6, 2026 08:13
possible solar top-up charging of two nimh in series
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ericfont
/ circuit-20260103-1511.svg
Created
January 3, 2026 20:10
lowpass filtering LC ladder string
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