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Practical
Electronics
Volume 51. No. 1
January 2022
ISSN 2632 573X
Contents
Projects and Circuits
Vintage Battery Radio Li-ion Power Supply by Ken Kranz and Nicholas Vinen
intage adio
and
atteries have een uno taina le or so e ti e. his
co act and easy to uild odule uses i ion or i o cells.
16
The MiniHeart by John Clarke
ive a avourite so t toy a eating heart ith oth a so t sound and a real eat
it could rela a a y a u y or even hel you slee etter
24
Balanced Input and Attenuator for the USB SuperCodec – Part 2
by Phil Prosser
s descri ed last onth this add on oard or the
u er odec rovides t o
alanced in uts and fits in the sa e instru ent case no let s uild it
32
The Fox Report by Barry Fox
o er as ree as the ind
8
Techno Talk by Mark Nelson
o
uning ith nature
10
Series, Features and Columns
Net Work by Alan Winstanley
he latest to ical ne s a out
s the un o u grading to
u dates on satellite and s ace technology.
Flowcode
C
void interrupt(void)
{
if (intcon & 4)
{
clear_bit(intcon, 2);
FCM_INTERRUPT_TMR
o();
movlw D′7′
bsf STATUS, RP0
bcf STATUS, RP1
movwf _adcon1
movlw D′192′
movwf _option_reg
Hex
:040000008A01122837
:08000800F000F00S030
EF10000
:10001000040EF2000A0
EF300BA110A122928352
86C
:2000200D928FE28073
Made in the UK.
Written in Britain, Australia,
the US and Ireland.
Read everywhere.
© Electron Publishing Limited 2021
Copyright in all drawings, photographs, articles,
technical designs, software and intellectual property
published in Practical Electronics is fully protected,
and reproduction or imitation in whole or in part are
expressly forbidden.
The February 2022 issue of Practical Electronics will be
published on Thursday, 6 January 2022 – see page 72.
Practical Electronics | January | 2022
12
39
a s Cool eans y ax The agnificent
lashing
s and drooling engineers
art
44
i by Mike Hibbett
evelo ent oard
48
Circuit Surgery by Ian Bell
ogarith ic and
onential
Audio Out by Jake Rothman
nalogue ocoder
art
river
lifiers
art
lifier
54
58
Make it with Micromite by Phil Boyce
art
sing i uttons ith the icro ite
62
Wireless for the Warrior
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Next month! – highlights of our next issue of Practical Electronics
2
4
6
7
7
Regulars and Services
192kHz, 24-bit
and
Flowcode Graphical Programming by Martin Whitlock
ed oard and
s
art
PIC n
art
Assembly
indo s
11
38
53
68
70
72
1
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