Robobot circuits - Revision history

Jca: /* PCB plugs and devices */

2025-02-02T12:02:22Z

PCB plugs and devices

← Older revision		Revision as of 14:02, 2 February 2025
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	[[File:PCB_foto_8.5_annotated.jpg \| 900px]]		[[File:PCB_foto_8.5_annotated.jpg \| 900px]]

	Figure 6. Connectors. The unused connectors are 2 I2C plugs (I2C and I2C1), an SPI plug (with a driver for AS5147), and a ~~Power~~ ON-OUT that can be used to power other similar boards (connect to on-in).		Figure 6. Connectors. The unused connectors are 2 I2C plugs (I2C and I2C1), an SPI plug (with a driver for AS5147), and a power ON-OUT that can be used to power other similar boards (connect to on-in).

	=== PCB LEDs ===		=== PCB LEDs ===

Jca: /* PCB plugs and devices */

2025-02-02T12:02:02Z

PCB plugs and devices

← Older revision		Revision as of 14:02, 2 February 2025
Line 43:		Line 43:
	[[File:PCB_foto_8.5_annotated.jpg \| 900px]]		[[File:PCB_foto_8.5_annotated.jpg \| 900px]]

	Figure 6. Connectors. ~~Unused~~ connectors are: 2 I2C plugs (I2C and I2C1), SPI plug (with driver for AS5147), ON-OUT that can be used to power on other similar boards (connect to on-in).		Figure 6. Connectors. The unused connectors are 2 I2C plugs (I2C and I2C1), an SPI plug (with a driver for AS5147), and a Power ON-OUT that can be used to power other similar boards (connect to on-in).

	=== PCB LEDs ===		=== PCB LEDs ===

Jca: /* PCB view annotated */

2025-02-02T11:59:30Z

PCB view annotated

← Older revision		Revision as of 13:59, 2 February 2025
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	Figure 5. Populated PCB with Teensy 4.1 and O-LED display.		Figure 5. Populated PCB with Teensy 4.1 and O-LED display.

	=== PCB ~~view annotated~~ ===		=== PCB plugs and devices ===

	[[File:PCB_foto_8.5_annotated.jpg \| 900px]]		[[File:PCB_foto_8.5_annotated.jpg \| 900px]]

Jca: /* Raspberry PI */

2025-02-02T11:55:08Z

Raspberry PI

← Older revision		Revision as of 13:55, 2 February 2025
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	Figure 9. PCB layout.		Figure 9. PCB layout.

	== Raspberry PI ==		== Raspberry PI pinout ==

	[[File:Raspberry_Pi_GPIO_pins.png \| 500px]]		[[File:Raspberry_Pi_GPIO_pins.png \| 500px]]

	Figure 9. GPIO pin numbers, the bottom 10 pins are used for the IO-board. Pin1 on the cable match Pi pin 31 (GPIO6).		Figure 9. GPIO pin numbers, the bottom 10 pins are used for the IO-board. Pin1 on the cable match Pi pin 31 (GPIO6).

Jca: /* Line sensor */

2025-02-02T11:54:28Z

Line sensor

← Older revision		Revision as of 13:54, 2 February 2025
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	Figure 7. Circuit diagram for the line sensor. 8 sensors with a change amplifier and analogue output. The 18 LEDs provide the blinking light at the sample rate (on Regbot 1kHz).		Figure 7. Circuit diagram for the line sensor. 8 sensors with a change amplifier and analogue output. The 18 LEDs provide the blinking light at the sample rate (on Regbot 1kHz).

			=== Function ===

	[[file:line-sensor-sensor-curve-2025.png \| 400px]]		[[file:line-sensor-sensor-curve-2025.png \| 400px]]

Jca: /* Circuit */

2025-02-02T11:48:23Z

Circuit

← Older revision		Revision as of 13:48, 2 February 2025
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	Figure 7. Circuit diagram for the line sensor. 8 sensors with a change amplifier and analogue output. The 18 LEDs provide the blinking light at the sample rate (on Regbot 1kHz).		Figure 7. Circuit diagram for the line sensor. 8 sensors with a change amplifier and analogue output. The 18 LEDs provide the blinking light at the sample rate (on Regbot 1kHz).

			[[file:line-sensor-sensor-curve-2025.png \| 400px]]

			The sensor has a linear characteristic over almost 3 decades of background illumination.
			If additional illumination is about 0.025 mW/cm^2, the sensor current will increase about 1 uA. This requires a constant voltage across the sensor.

			[[file:line-sensor-circuit-2025.png \| 400px]]

			For sensor 1 (shown), Q1 ensures a constant voltage across the sensor D1. The illumination LEDs are turned on and off at half-sample intervals, this gives a current variation in the sensor. Q1 has a very high impedance, due to the gate capacitor, so the current variation through especially R4 (150kOhm) gives a voltage to the gate of Q4. This is amplified with a factor 4.5 to the output at ''ls_1''.

	=== PCB ===		=== PCB ===

Jca: /* PCB view annotated */

2025-02-02T09:04:24Z

PCB view annotated

← Older revision		Revision as of 11:04, 2 February 2025
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	Figure 6. Connectors. Unused connectors are: 2 I2C plugs (I2C and I2C1), SPI plug (with driver for AS5147), ON-OUT that can be used to power on other similar boards (connect to on-in).		Figure 6. Connectors. Unused connectors are: 2 I2C plugs (I2C and I2C1), SPI plug (with driver for AS5147), ON-OUT that can be used to power on other similar boards (connect to on-in).

			=== PCB LEDs ===

			[[file:PCB-leds-annotated.jpg \| 800px]]

	== Line sensor ==		== Line sensor ==

Jca at 16:37, 27 December 2024

2024-12-27T16:37:16Z

← Older revision		Revision as of 18:37, 27 December 2024
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	The PCB layout for the digital IO circuit.		The PCB layout for the digital IO circuit.

	== ~~Regbot~~ ==		== Robobot ==

	=== Circuit diagram ===		=== Circuit diagram ===
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	Figure 4. PCB with more trace details.		Figure 4. PCB with more trace details.

	=== PCB ~~- 3D~~ view ===		=== PCB view ===

	[[File:PCB_foto_8.5.jpg \| 900px]]		[[File:PCB_foto_8.5.jpg \| 900px]]

	Figure 5. Populated PCB with Teensy 4.1 and O-LED display.		Figure 5. Populated PCB with Teensy 4.1 and O-LED display.

			=== PCB view annotated ===

	[[File:PCB_foto_8.5_annotated.jpg \| 900px]]		[[File:PCB_foto_8.5_annotated.jpg \| 900px]]
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	[[File:line_sensor_3.1_circuit.png \| 700px]]		[[File:line_sensor_3.1_circuit.png \| 700px]]

	Figure 6. Circuit diagram for the line sensor. 8 sensors with a change amplifier and analogue output. The 18 LEDs provide the blinking light at the sample rate (on Regbot 1kHz).		Figure 7. Circuit diagram for the line sensor. 8 sensors with a change amplifier and analogue output. The 18 LEDs provide the blinking light at the sample rate (on Regbot 1kHz).

	=== PCB ===		=== PCB ===
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	[[File:line_sensor_3.1_PCB_3D.png \| 700px]]		[[File:line_sensor_3.1_PCB_3D.png \| 700px]]

	Figure 7. The PCB in 3D view. The distance from the first to the last sensor is 12cm.		Figure 8. The PCB in 3D view. The distance from the first to the last sensor is 12cm.

	[[File:line_sensor_3.1_PCB.png \| 700px]]		[[File:line_sensor_3.1_PCB.png \| 700px]]

	Figure 8. PCB layout.		Figure 9. PCB layout.

	== Raspberry PI ==		== Raspberry PI ==

Jca: /* PCB - 3D view */

2024-12-27T16:30:53Z

PCB - 3D view

← Older revision		Revision as of 18:30, 27 December 2024
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	[[File:PCB_foto_8.5.jpg \| 900px]]		[[File:PCB_foto_8.5.jpg \| 900px]]

	Figure 5. Populated PCB.		Figure 5. Populated PCB with Teensy 4.1 and O-LED display.

	[[File:PCB_foto_8.5_annotated.jpg \| 900px]]		[[File:PCB_foto_8.5_annotated.jpg \| 900px]]

Jca: /* PCB - 3D view */

2024-12-27T16:28:36Z

PCB - 3D view

← Older revision		Revision as of 18:28, 27 December 2024
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	=== PCB - 3D view ===		=== PCB - 3D view ===

	[[File:PCB_foto_8.~~5_annotated~~.jpg \| 900px]]		[[File:PCB_foto_8.5.jpg \| 900px]]

	Figure 5. Populated PCB.		Figure 5. Populated PCB.

	[[File:PCB_foto_8.5.jpg \| 900px]]		[[File:PCB_foto_8.5_annotated.jpg \| 900px]]

	Figure 6. Connectors. Unused connectors are: 2 I2C plugs (I2C and I2C1), SPI plug (with driver for AS5147), ON-OUT that can be used to power on other similar boards (connect to on-in).		Figure 6. Connectors. Unused connectors are: 2 I2C plugs (I2C and I2C1), SPI plug (with driver for AS5147), ON-OUT that can be used to power on other similar boards (connect to on-in).


	== Line sensor ==		== Line sensor ==