Shared Projects by johnsondavies

Shared Projects by johnsondavies

Two-Digit Thermometer

2 layer board of 1.10 x 1.05 inches (28.0 x 26.7 mm)
Uploaded: April 09, 2019
Shared: April 09, 2019
Total Price: $5.75

A two-digit LED thermometer using a DS12B20 1-Wire temperature sensor, and an ATtiny84 to drive the display and read the sensor.

See <http://www.technoblogy.com/show?2G8T>.

A two-digit LED thermometer using a DS12B20 1-Wire temperature sensor, and an ATtiny84 to drive the display and read the sensor.

See <http://www.technoblogy.com/show?2G8T>.

Embeddable link to order this shared Project

Tiny Function Generator

2 layer board of 1.60 x 1.25 inches (40.7 x 31.8 mm)
Uploaded: December 23, 2018
Shared: February 07, 2019
Total Price: $10.00

A signal generator based on an ATtiny85 that uses Direct Digital Synthesis to generate a range of different waveforms, including sine, square, triangle, and noise.

See <http://www.technoblogy.com/show?2FCL>.

A signal generator based on an ATtiny85 that uses Direct Digital Synthesis to generate a range of different waveforms, including sine, square, triangle, and noise.

See <http://www.technoblogy.com/show?2FCL>.

Embeddable link to order this shared Project

ATtiny10 Thermometer

2 layer board of 0.75 x 0.75 inches (19.1 x 19.1 mm)
Uploaded: February 02, 2019
Shared: February 02, 2019
Total Price: $2.80

A small battery-powered thermometer based on an ATtiny10 and a DS18B20 temperature sensor that displays the temperature as a series of red and green flashes on a bi-colour LED.

See <http://www.technoblogy.com/show?2GPX>.

A small battery-powered thermometer based on an ATtiny10 and a DS18B20 temperature sensor that displays the temperature as a series of red and green flashes on a bi-colour LED.

See <http://www.technoblogy.com/show?2GPX>.

Embeddable link to order this shared Project

Lisp Badge

2 layer board of 4.20 x 2.40 inches (106.7 x 61.0 mm)
Uploaded: November 28, 2018
Shared: January 10, 2019
Total Price: $50.40

A handheld computer with a self-contained keyboard and display that you can program in Lisp.

See: <http://www.technoblogy.com/show?2AEE>.

A handheld computer with a self-contained keyboard and display that you can program in Lisp.

See: <http://www.technoblogy.com/show?2AEE>.

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Continuity Tester

2 layer board of 1.75 x 0.40 inches (44.4 x 10.2 mm)
Uploaded: November 13, 2017
Shared: November 30, 2018
Total Price: $3.50

This article describes a simple continuity tester, based on an ATtiny85 and a piezo buzzer, designed for checking circuit wiring, or tracing out the tracks on a PCB.

It has a low threshold resistance of 50Ω to avoid false positives, and passes less than 0.1mA through the circuit under test, to…

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This article describes a simple continuity tester, based on an ATtiny85 and a piezo buzzer, designed for checking circuit wiring, or tracing out the tracks on a PCB.

It has a low threshold resistance of 50Ω to avoid false positives, and passes less than 0.1mA through the circuit under test, to…

Show full description

Embeddable link to order this shared Project