  If you still have a few floppy drives left over after making your Floppy Drive CNC machine have a look at making some music by making a Floppy Disk Jukebox!  “The overall setup is completly modular. Each floppy is connected to its own floppy driver (rrfdc), which in turn speaks I²C with the main board (rrcmd). On power-on the main board auto-discovers the connected floppies and adjusts the
If you are fixing some used electronics chances are you will come across some bad caps that are causing some issues. Capacitors have a property known as ESR or equivalent series resistance. Caps will often test fine with a capacitor value check but are still bad. There are two types of capacitor ESR meters, in circuit and out of circuit. The in circuit meter will, as the name implies
This amp sure had a ton of issues. Maxxarcade found that there were multiple shorted transistors that needed to be replaced. The amp was built with the TO-220 power transistor’s tab soldered to a thin heatsink. A cooking skillet was used to pre-heat the assemblies to allow the parts to be removed and resoldered using a regular iron.Â
If you have something in the real world that you would like to monitor this Arduino Data Visualization will help you to do just that. “Hardware: Arduino (We’re using the UNOr3) Ethernet Shield DHT22 Temperature + Humidity Sensor Hookup wires Angled pin headers (unless you use female-male hookup wires, then you won’t need these) 9v Wall Adapter Ethernet Cable Software: Latest Arduino software (1.0.5) Plotly Arduino Library Adafruit DHT
Long time maker Bob Davis has made a Robo-Raptor that is controlled by an Arduino. When the stock electronics in a product don’t do what you want just hack some new brains into them! This robot is from the pages of his book, Arduino Robotics Projects.
Richard Harris made a low cost micro CNC machine that uses old floppy drives for the movement. The video above is 10 in the series, if you would like to build you own you will need to start from video 1 which is here. It won’t do anything big, but what do you want for a machine built from parts that would normally be tossed out?
Ian Johnston purchased a used Pioneer amplifier that was slightly defective. The amplifier would not function when the tone controls are switched in (this amp has a bypass switch which allows these controls to be bypassed). Turns out that the amplifier was fine, the issue was missing RCA Jumper Links , you can see what these jumpers normally look like in the picture below. This amplifier doesn’t have a
