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i'm learning how to make my own [diy-synthesizer]. also see my notes on [electrical-engineering].
there are a lot of CMOS 4000 series ICs to do various things
check [wikipedia] for datasheets and descriptions
[datasheet]
CMOS Counter/Divider
also called a 5-stage johnson counter, or a decade counter
10 decoded ouputs
the count is advanced one count at each positive clock signal transition, as long as the clock inhibit signal is low. otherwise, if the inhibit signal is high, the clock will not advance.
sending a high signal to reset will clear the counter to the zero position
[datasheet]
CMOS Ripple-Carry Binary Counter/Divider
takes input pulses and divides them into smaller / faster pulses
each Q value = division by 2^Q
[datasheet]
CMOS Micropower Phase-Locked Loop (PLL)
has a voltage controlled oscillator (VCO) in it
contains two phase comparators
to use as an oscillator we need
one external capacitor (C1)
one/two external resistors (R1, R2)
C1, R1 determine frequency range
R2 determines frequency offset
also features an on/off switch of sorts
[datasheet]
CMOS Analog Multiplexers/Demultiplexers with Logic Level Conversion
digitally controlled analog switches
converts 3 bits of data (e.g. three square waves)
A, B, C take digital signals (or square waves lol)
these values are translated into one of the available channels out
these can be reversed when used as demultiplexers
`INH` is inhibit
[datasheet]
CMOS Quad Bilateral Switch
intended for transmission or multiplexing of analog or digital signals
pin for pin compatible with the CD4016B
[datasheet]
CMOS Quad 2-Input NAND Schmitt Triggers
has four distinct NAND gates in it
can use this for making oscillators
[datasheet]
low voltage audio power amplifier
can be used as an operational amplifier
it also lets you specify the gain you want to add
[datasheet]
Quadruple Half-H Drivers
[datasheet]
General Purpose Photocoupler
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