Usually high level quiz competitions are very much time-oriented as it becomes significant to determine who has answered first. So here we’ll see how to make a buzzer system that helps to decide the winners. Actually I designed this circuit of buzzer for quiz program conducted in our area and then I thought it may […]
With the B&W Zeppelin Air being such a popular iPod docking station as well as a fantastic AirPlay compatible device we thought it would be a good idea to write a ‘how to’ on setting up your new Zeppelin Air. As of September 2012 newer machines are installed with a slightly newer firmware version. The […]
The Development Board v. 1.1 connected to an LCD display. It is well visible (read further, in the description) the row of LEDs used to check the logic state of up to 8 I/O ports or external circuits’ pins. Of course, if you own an 8 trace oscilloscope, you can do without it. :-)) On […]
An elderly, but still sought after Marantz CD63SE was bought into the shop last week, with the fault reported that CD’s would no longer play. After approximately 15 years of use, this is a common situation, as the laser power will gradually reduce over time to the point where it can no longer focus reliably […]
Introduction This page is about electronic drums. Here you will find detailed information on how to build an electronic Trigger to MIDI Converter module, based on PIC Microcontroller, and how to build the triggers. This project has been developed for many years now, and it is constantly improving. You can expect professional results form your […]
This 2004 vintage Arcam CD73 came into us with the reported fault that it would no longer play CD’s, or even read the table of contents. Given that it is over eight years old and had plenty of use in that time, we were not surprised to find that the laser had expired and needed […]
We recently had a customer present this faulty Alchemist Forseti integrated amp for repair – I’d guess this dates from the 1990’s and has been well looked after. It’s a bit of a bruiser as you can see from the extensive heatsinking! Unfortunately it developed a DC fault on the loudspeaker outputs and destroyed the […]
Table of Contents Table of Contents Introduction Cab Design Goals Cab Electronics Power and Cable Interface Microcontroller Seven Segment Display Buttons LED’s Cab Printed Circuit Board Cab Software Summary Introduction {Introduction goes here.} Cab Design Goals The goals for the handheld cab are: Light weight. Comfortable. Not visibly warm (i.e. low power consumption). Assembled from […]
Philips invented the RC5 protocol for controlling electronic equipment such as CD players, VCR’s and audio amplifiers way back in the 1980’s. The RC5 standard has been adopted and used with great success ever since, which means it is probably the most common IR remote control format in your home today. We have recently been […]
The single character LED sign I had been playing with now has a purpose! Shortly after discarding several ideas of having it as a serial display for PC/Server status, or hooking it up to the internet and a webcam, I came up with an actual useful purpose. The sign can be a clock! I have […]
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