2024-02-26 (M) AugLim RADARBadge Less-than-ideal concept

The PCB motors did not work as well as I had hoped, and when the group discussed it, people were disappointed and suggested other badge options. The deadline was approaching, so I thought about simple variations and returned to the original model with a cheap gear motor.

The two problems with that design were integrating a speed controller and mounting the motor. Many people would not mind installing the motor and soldering a couple of wires if they could save a few dollars by buying it as a kit. I wanted to try something unusual for the speed controller with a series of diodes and switches to control how many the circuit used.
Super simple spinner circuit

Standard silicon diodes drop 0.7 volts each, so by running the power through five of them, the load will see 3.5 volts less than the supply provides. I used four AA batteries in the circuit, so depending on where the user taps into the circuit, they can choose 2.5 to 6.0 volts. I chose easyeda.com, which I have used in the past with good results, but they are not sponsoring this project.
Unadorned component layout

The rest of the posts for this project have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10

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