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Mark 2 Memory circuit – Circuit Schematic
Mark 2 Memory circuit
The memory part of my Mark 2 system is extremely simple. There are two 32K SRAM chips (actually FRAM because I had them lying around, but there isn`t any signif...
16 Step Sequencer Quantized Vari-Clock Module – Circuit Schematic
16 Step Sequencer Quantized Vari-Clock Module
A mechanism by which a normal pot could be used as a digitized pot since I need each pot`s setting to be converted to a number between 0 and 15. I use that info...
simple six way switch using ic1 40106n – Circuit Schematic
simple six way switch using ic1 40106n
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pushbutton switch circuit – Circuit Schematic
pushbutton switch circuit
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push button switch de bouncer – Circuit Schematic
push button switch de bouncer
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digital switching system – Circuit Schematic
digital switching system
This circuit can control any one out of 16 devices with the help of two push-to-on switches. An up/down counter acts as a master-controller for the system. A vi...
alternating on off switch with ic 4069 – Circuit Schematic
alternating on off switch with ic 4069
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digital dice with 7 segment display – Circuit Schematic
digital dice with 7 segment display
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PSIM Training CD-ROMs – Circuit Schematic
PSIM Training CD-ROMs
The counter must be programmed as part of a batch-counting operation to sort parts automatically for quality control. The counter is installed to divert 1 part ...
video sequencer using analog multiplexers – Circuit Schematic
video sequencer using analog multiplexers
Here is another example of using a CD4051 multiplexer, or more accurately a pair of CD4051s in parallel. I had lifted much of the core logic and circuits from D...
MikroC Pro for PIC driver routine for 74HC595 based serial LCD interface – Circuit Schematic
MikroC Pro for PIC driver routine for 74HC595 based serial LCD interface
Library routines for 3-wire LCD interface based on 74HC595 shift register. More details are provided in the attached ReadMe document or posted at Do you want to...
Electromechanical relay logic – Circuit Schematic
Electromechanical relay logic
In ladder logic symbolism, an electromechanical relay coil is shown as a circle, and the contact(s) actuated by the coil as two parallel lines, almost like a ca...
Encoders and decoders – Circuit Schematic
Encoders and decoders
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7-segment display – Circuit Schematic
7-segment display
This experiment is more of an introduction to the 4511 decoder/display driver IC than it is a lesson in how to "build up" a digital function from lower-level co...
LED sequencer – Circuit Schematic
LED sequencer
The model 4017 integrated circuit is a CMOS counter with ten output terminals. One of these ten terminals will be in a "high" state at any given time, with all ...
NAND gate S-R flip-flop – Circuit Schematic
NAND gate S-R flip-flop
Although the parts list calls for a ten-segment LED unit, the illustration shows two individual LEDs being used instead. This is due to lack of room on my bread...
Basic gate function – Circuit Schematic
Basic gate function
To begin, connect a single NAND gate to two input switches and one LED, as shown. At first, the use of an 8-position switch and a 10-segment LED bargraph may se...
CMOS gate circuitry – Circuit Schematic
CMOS gate circuitry
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One Of Nine Sequencer – Circuit Schematic
One Of Nine Sequencer
This novel circuit uses a flashing LED as the clock input for a 4017 decade counter. Typical flashing LEDs (eg, DSE cat Z-4044) flash at about 2Hz so the output...
Logic Probe With Sound – Circuit Schematic
Logic Probe With Sound
This logic probe can be selected to operate on TTL or CMOS logic levels, depending on switch S1. A string of resistors associated with switch S1 sets the thresh...