This circuit is an interface between 89C52 of Atmel with 7135 of Intersil. With This circuit you can read analog data of both polarities you can change the range scale with extra circuits, you can store data on a EEPROM or send them to PC thru RS232 or Comm port.
ICL7135 to Printer port Interface
The four [...]
Archive of posts filed under the Circuits category.
TechLib – Electronic Experimenter Records
TechLib – Electronic Experimenter Records
A technical library for the hobbyist and experimenter. – Charles Wenzel
World’s Smallest Geiger Counter
Karen’s Mic. Input Telemetry Device
Temperature Controlled Ovens
Two-Transistor Atomic Frequency Standard
Super-Sensitive Ionization Chamber
Cockcroft-Walton Diode Voltage Multipliers
delabs Schematics on Wordpress and Laughing Squid
delabs Schematics now on a WordPress, you can comment on the circuits if you need more details. I will try to clarify your doubt or suggest extra reading.
Electronics Circuits is now Hosted on Laughing Squid.
It is a Copper Squid, That makes it more Electrifying !
SWTPC Computer Documentation Repository
SWTPC Computer Documentation Repository
This site’s purpose is to address the lack of technical information for some of the rarer vintage computers and related peripherals, with a strong focus on SWTPC. More than 600 pages of assembly instructions, schematics, program listings, catalogs, photos and much, much more!
Bill’s Knowledge Base
Michael Holley’s massive SWTPC doc collection.
Popular Electronics
Radio-Electronics
Hands-on [...]
Circuits using only discrete devices
Here are circuits made of Resistors, Capacitors and Inductors which are passive components. Crystals, Thermistors, Varistors, Variable Passive RLC are also Passive Parts. Zeners, Diodes, NPN-PNP Transistors, FET, MOSFET, SCR, Triacs are all discrete active devices.
Circuits using only discrete devices
Isolated dual power supply from 5V
Telephone LED status indicator
Music Sound to light converter
Simple Water operated relay
LED [...]
Power Electronics and Mains Power
I have updated some pages, and integrated new pages with some explanations. These are related to mains power and power electronics. – ananth Tables related to Power Electronics
High Resistance Insulation Materials
Mains Voltage Power Transformers
Ohms Law – Amps Volts Watts Relation
Mains Voltage and Power Circuits
Stabilizer Step up 230V AC 500VA
Solid-State Stabilizer Step up 110V AC
Mains Voltage [...]
Measureall Workbench Test Instrument
This was a Student Project of mine, it is a very basic instruments that could do most of the tasks on a test bench.
The cabinet used, was available as a part of a Hi-Fi DIY System, The Range and Mode switches were Modular Stackable Interlocked MultiPole Switches. The rest of the Interface were wirewound pots, [...]
