delabs Electronic Circuits

Here are some circuits and projects. Some are with pcb and source files. delabs

• Analog Circuits
• • Industrial Process Control Circuits
  • • Mini RTD Pt-100 3W Transmitter
    • RTD Mains Power Transmitter
    • Analog Temperature Controller
  • Instrumentation and Measurement
  • • Auto range 4-1/2 Digital
      Voltmeter
    • 3-1/2 Digit ICL7107 DPM DVM
    • Current Source mA for
      calibration
  • Mixed Circuits Analog with Digital
  • • Fluid Level with Reed Relays
  • Basic Opamp Circuits
  • • Square & Triangle Oscillator
    • Inverting Amplifier Op-Amp
    • Non-Inverting Amplifier Op-Amp
    • Differential Amplifier OpAmp
    • 3 OpAmp Instrumentation Amp
    • Buffer or Unity Gain Op-Amp
    • Two Op-Amp Differential Amplifier
  • Temperature Measurement Control
• Digital Circuits
• • Basic Digital Circuits
  • Digital Timers, Counters and Clocks
  • Mixed and Interface Circuits
  • 555 Timer based Circuits
  • • Pulse width modulation 555
    • Fixed frequency var DC 555
    • Watchdog for uC uP systems
    • OR gate with two 555
    • Drive SCR thyristor with 555
    • LM555 Voltage Doubler
    • 555 based Reset Generator
• Power Electronics
• • Power Electronic Circuits
  • Power Supplies Section
  • • Regulated High Voltage Supply
    • Switching Battery Charger L296
    • WorkBench Dual Power Supply
  • Solid State Relays – SSR
  • • DC Load DC Control SSR
    • DC-AC Solid State Relay
    • NO AC Load SSR DC control
    • PCB AC Load SSR DC control
    • NC AC Load SSR DC control
    • AC-AC Solid State Relay
  • High Energy Circuits
• MicroController
• • 80C51, SBC, Firmware Circuits
  • Microcomputer Process Control
  • Interface 80C51 to ICL7135
  • 80C39-8749 MCS-48
• Electrical Diagrams
• • Control Panel Wiring Diagrams
  • Circuits with Discrete devices
  • • Isolated dual supply from 5V
    • Telephone LED status indicator
    • Music Sound to light converter
    • Simple Water operated relay
    • LED Voltage Level Indicator
    • Basic Relay or Solenoid Driver
  • Electronic Tables and Charts
  • • Exponents – Giga Tera Pico Nano
    • Ohms Law Amps Volts Watts
    • Types of Resistors – Color code
    • Binary and Hexadecimal System
    • Thermocouple and Pt-100 RTD
    • High Resistance Materials
    • Mains Voltage Transformers
  • Mains Voltage Stabilizers
  • • Stabilizer Step up 230V AC 500VA
    • Solid-State Stabilizer 110V AC
    • Mains V and I LED Indicators
    • Mains Voltage monitor LM324
    • Mains Voltage monitor LM3914
    • Triac Lamp Dimmer power control
• Hobby DIY Circuits
• • Insulation Tester
  • • Insulation Tester pico
      amplifier
    • Insulation Tester power
      supply
    • Insulation Tester Theory
    • Catalog of Insulation
      Tester
  • Simple Test Equipment
  • • High Resistance Indicator
    • Digital Potentiometer
    • Function Generator ICL8038
  • Home Made Circuits
  • • Battery Level Indicator.
    • Optical Obstacle Switch.
• Test and Measurement
• • DMM or digital multi meter
  • • LM3914 analog display
    • 3-1/2 digital display
    • Power supply with battery
    • DMM range and AC-DC mode
    • AC conversion continuity
    • Voltage attenuator amp
    • Current Shunt Amplifier
    • Resistance Current Source
    • Analog Buffer and Inverter
  • Small Electronic Testing Tools
  • • Low cost Dial AVO meter
• Computer Data Interface
• • Analog Interface for PC Ports
  • • ICL7135 to Printer port
    • Milli Volt Source Printer Port
  • Control Interface to PC Ports
  • • Simple Printer Port Interface
    • Test Circuit for Logic Analyzer
    • 256 Relays 16K Dot Matrix
    • Byte Blaster in Quartus

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Electronics Theory

• Process Control Application notes
• • Temperature Control – Molding
  • Temperature Applications
  • Connection Diagrams AC DC SSR
  • Fire Retardant SSR Enclosures
  • Pressure and Flow Control
• Process Control Instrumentation
• • Temperature Controller Production
  • Thermocouple with DPM – DMM
  • Proportional Controller Specs
  • Process Scanner and Calibrator
• Instruction Manuals – Control Panels
• Test & Measurement Instruments
• • Telecom or Communications T&M
  • Custom Built Test Instruments
  • Lab Benchtop Test Instruments
  • Instruments used in Calibration