circuit4u-medium
circuit4u-medium
/ 555_piano.ijs
Created
November 16, 2019 20:35
J-lang (jsoftware) code to calculate resistor values for 555 timer IC
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| load 'plot' | |
| [ scale =: +/\ 0 2 2 1 2 2 2 1 | |
| [ freq_factor =: 2^ scale % 12 | |
| [ ff =: 698.456 % freq_factor NB.go down scale from F5 | |
| [ r5 =: (% 698.456 * 1.4 * 100e_9) |
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| require 'jmf' | |
| require 'plot' | |
| NB. turn bytes into unsigned ints (little endian) | |
| touint =: 256 #. a. i. |. | |
| NB. turn bytes into signed ints | |
| toint2 =: _1 & ic | |
| toint4 =: _2 & ic | |
circuit4u-medium
/ tiny_forth_nxt.ino
Last active
August 28, 2020 13:38
extend Tiny forth (http://middleriver.chagasi.com/electronics/tforth.html) with Arduino hardware primitives
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| // Tiny Forth NXT | |
| // based on T. NAKAGAWA's Tiny Forth | |
| // added Arduino hardware API and protothreads | |
| // 8/2020 | |
| #include <EEPROM.h> | |
| // protothreads library |
circuit4u-medium
/ chess_clock.ino
Created
August 28, 2020 13:58
Tiny Forth NXT implementing a chess clock
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| // Tiny Forth NXT | |
| // based on T. NAKAGAWA's Tiny Forth | |
| // added Arduino hardware API and protothreads | |
| // 8/2020 | |
| #include <EEPROM.h> | |
| #include "TM1637.h" | |
| #define CLK 16//pins definitions for TM1637 and can be changed to other ports |
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circuit4u-medium
/ FT232H_TC1.ipynb
Created
October 26, 2020 19:31
FT232H with MAX31855 thermocouple read
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