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Articles
Title
Insect Robot (MEC217E)
Climber Robot (MEC218E)
ADR-1 Robot (MEC217E)
Using the Hydraulic Pressure (MEC216E)
Mechanics of liquids (MEC215)
Motion Conversion (MEC214E)
Build an Experimental Servo (MEC211E)
Springs in series and Parallel (MEC213E)
Stepper Motors (MEC210E)
Isolated Shields For Arduino and Other Microcontrollers (MEC031E)
DC Motor Linear Control (MEC212E)
Relay Logic Functions (ART426E)
Turning a Load On and Off (MEC168E)
Light or Temperature Dependent Oscillator (MEC209E)
Fast Monostable Sensor (MEC208E)
Light or Temperature Triggered Monostable (MEC207E)
Light or Temperature Dependent Oscillator (MEC206E)
Light-Sensitive/Temperature-Dependent Oscillator (MEC205E)
Light/Temperature-Controlled Oscillator (MEC204E)
Thermal Crowbar (MEC203E)
Current Sensor Using an NTC (MEC202E)
Opto-Isolator with Logic Input (TTL and CMOS) (MEC201E)
Opto-Isolator Using LDR (MEC200E)
Dark-Activated Circuit Using an SCR (MEC198E)
Priority Circuit Using Resistive Sensors (MEC199E)
Light-Activated Circuit Using an SCR (MEC197E)
Increasing Sensitivity of Resistive Sensors (MEC196E)
Snap Action For Resistive Sensors (II) (MEC195E)
Snap Action for Resistive Sensors (I) (MEC194E)
Differential Resistive Sensor (MEC193E)

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Circuit Bench

  • 1 mA Constant current sourcer (CB1197E)

        The transistor of this constant current source may be the BC548 or equivalent. Resistor R2 may be...

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           This proximity sensor was found in a 90s Popular Electronics. The base is a PLL567 that operates...

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      This circuit, from 1990 documentation, can be assembled with BC558 transistors for Q1 and Q2,...

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