NEW202404.TXT

 

ON 20240402@8:46:34 PM at page:
On a web page you were interested in at:
http://www.massmind.org/Techref/leds.htm#45384.8656712963
James Newton[JMN-EFP-786] See also:
https://hackaday.io/page/21308-the-7-segment-decoder-done-wrong
4 bit to 7 segment decoder (digits only) with fewer components by<i>not using binary</i>. E.g. the 4 bit values are selected to reduce complexity. Using diodes for OR and transistor inverters makes for a very tiny circuit. Input bits are w, x, y, z. <PRE>
wxyz digit
---- -----
1101 0
0000 1
1011 2
1010 3
0100 4
0110 5
0111 6
1000 7
1111 8
1110 9

</PRE>
And the outputs are described by this logic:
<PRE>
a = x | z
b = x | ~z
c = y | ~w
d = z | w
e = w
f = y
g = ~(x | ~y) | z
</PRE>



ON 20240402@9:10:13 PM at page:
On a web page you were interested in at:
http://www.massmind.org/Techref/displays.htm#45384.8820949074
James Newton[JMN-EFP-786] See also:
https://hackaday.io/project/18445-brainfcktor/log/50032-new-start-character-generator-tables-in-144-bytes
Storing a low resolution font in very few bytes of data by re-using slices of the bitmap.



ON 20240402@9:10:46 PM at page:
On a web page you were interested in at:
http://www.massmind.org/Techref/displays.htm#45384.8820949074
James Newton[JMN-EFP-786] Replied to post 45384.8820949074 by https://hackaday.io/project/18445-brainfcktor/log/50032-new-start-character-generator-tables-in-144-bytes TARGET=_top

|Insert '<BR>Another version:<BR>
<a href="https://docs.google.com/spreadsheets/d/1u6zqFNge6mukWzv72dKhRjwrWkqPM1-MtmagKRP4_X4/edit#gid=0">https://docs.google.com/spreadsheets/d/1u6zqFNge6mukWzv72dKhRjwrWkqPM1-MtmagKRP4_X4/edit#gid=0</a>' at: '<!-- 45384.8820949074 EOR --><A style="color:#AF4040" TITLE="Click to login and reply" REL="nofollow" HREF="/techref/login/default.asp?req=/techref/update.asp%3Fact=reply%26url=/Techref/new202404.txt%26id=45384.8820949074">+</A>'

<A TITLE="JMN-EFP-786" NAME="45384.8820949074" HREF="https://hackaday.io/project/18445-brainfcktor/log/50032-new-start-character-generator-tables-in-144-bytes" TARGET="_top">
https://hackaday.io/project/18445-brainfcktor/log/50032-new-start-character-generator-tables-in-144-bytes</A> 
Storing a low resolution font in very few bytes of data by re-using slices of the bitmap.



ON 20240413@2:29:24 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/io/sensor/pos/enc/quadrature.htm#
James Newton[JMN-EFP-786] edited the page. Difference:
http://techref.massmind.org/techref/diff.asp?url=\Techref\io\sensor\pos\enc\quadrature.htm&version=0



ON 20240415@5:20:02 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/cpus.htm#45397.7222453704
James Newton[JMN-EFP-786] See also:
https://youtu.be/lC4YLMLar5I?si=IZnRcA27hpukRASj&t=1470
Part of a video about the retro video game "Elite", showing how micros work on the inside.



ON 20240429@10:23:22 AM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/pcb/smd/adapters.htm#45411.4328935185
James Newton[JMN-EFP-786] Says

<img align="right" src="http://techref.massmind.org/images/protopas2.gif">An SMT layout for prototyping analog circuits with transistors and resistors in a premade layout. Useful for adding front end / back end signal conditioning to proto boards so I could "figure that bit out later" and just get the main part of the PCB off to production sooner. Add a terminal block for power with a couple through hole pads to route power around with jumper wires. Often, just half the circle works

  .