Opto-Isolator with Logic Input (TTL and CMOS) (MEC201E)

This circuit was included in my book Robotics, Mechatronics and Artificial Intelligence (sold out) published in the United States. It shows how to implement a Opto-Isolator with logic input to be used as shield for microcontrollers. Applications include mechatronics or robotics projects with microcontrollers or as a building block for simple projects.

Figure 1 shows how an LED can be used to drive an opto-isolator from TTL or CMOS outputs. The value of resistor R depends on the logic and the power supply voltage as given by Table 1.

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Opto-Isolator Using LDR (MEC200E)

This circuit was included in my book Robotics, Mechatronics and Artificial Intelligence (sold out) published in the United States. It shows the project of a Opto-Isolator using an LDR as sensor. Applications include mechatronics or robotics projects with microcontrollers or as a building block for simple projects.

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Priority Circuit Using Resistive Sensors (MEC199E)

This circuit was included in my book Robotics, Mechatronics and Artificial Intelligence (sold out) published in the United States. It shows how to build a Priority Circuit using resistive sensors. Applications include mechatronics or robotics projects with microcontrollers or as a building block for simple projects.

This circuit can be used in many practical projects involving robotics, mechatronics, and artificial intelligence. If the sensors are LDRs, the circuit shown in Figure 1 triggers one of the loads, depending on which LDR was illuminated first.

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Dark-Activated Circuit Using an SCR (MEC198E)

This circuit is from in my book Robotics, Mechatronics and Artificial Intelligence (sold out) published in the United States. It shows how to build a Dark-Activated circuit using SCR and LDR. The circuit can be used in mechatronics or robotics projects with microcontrollers or as a building block for simple projects.

The block shown in Figure 1 turns on a load (relay, motor, etc.) when the amount of light falling onto the LDR is reduced by a shadow or if the sensor moves away from a light source.

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Light-Activated Circuit Using an SCR (MEC197E)

This circuit is from in my book Robotics, Mechatronics and Artificial Intelligence (sold out) published in the United States. It shows how to build a Light-Activated circuit using SCR and LDR. The circuit can be used in mechatronics or robotics projects with microcontrollers or as a building block for simple projects.

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Increasing Sensitivity of Resistive Sensors (MEC196E)

This circuit is from in my book Robotics, Mechatronics and Artificial Intelligence (sold out) published in the United States. It shows how to increase the sensitivity of resistive sensores. See more about resistive sensors in the article MEC188E. The circuit can be used in mechatronics or robotics projects with microcontrollers or as a building block for simple projects.

Read more: Increasing Sensitivity of Resistive Sensors (MEC196E)