In this post I describe how to make an igniter with simple materials and tools. I also provide a little bit of explanation about the working of the igniter.
Category: electronics
This experiment is about building a little robot cart. Make:Electronics describes all the steps that needs to be taken in great detail beginning with the cart and then the circuit. This experiment is a lot of work but I think it is worth it because you make a complete robot from the bottom up. The cart […]
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Homemade camera dolly
Finished camera dolly made out of Makeblock and plywood. The plywood is painted black with a regular (alkyd) spray paint. I make a lot of video’s of our projects so I figured a camera dolly would be a nice addition. I could buy one of course but making one is a lot more fun. About […]
During experiment 29 and 30 of Make:Electronics I noticed that the circuit were very susceptible to noise to the point that it really interfered with the experiments. While thinking about it I suspected that something was wrong with the breadboard. I decided to redo both experiments with a another breadboard (but without the low pass […]
After some refurbishing around the house I’m finally back with Make:Electronics. In experiment 30 I used most of the circuitry from experiment 29. The idea is to create a distorted sound. The base of an NPN transitor receives the output from the 555 timer thus controlling the base of another NPN transistor (see fig 5-55 […]
I finally reached the second stage of Experiment 29 of Make: Electronics. In the first stage I used an audio amplifier (TEA2025B) and a coil to create a crossover network. During this first stage the source of the audio was an iPod (read here). In the second stage the iPod was replaced by a 555 […]
A small update on the filtering experiment 29 of Make: Electronics that I wrote about earlier this week. To improve audibility especially of the lower frequencies I had to built an enclosure. The book proposes a plastic box but I had a shoebox made out of cardboard lying around. I cut a circular hole in […]
Finally, after earlier setback, I’ve got the amplifier and 4-inch speaker working properly. I tried multiple setups today and managed to get rid of the distortion. The book dictates 9V, 33K resistance on audio input. This results in my case in a temperature of 90 degrees (194 fahrenheit). Which is uncomfortably high. I therefore decreased […]
This experiment of Make: Electronics demonstrates the use of self-inductance and capacitance in audio filtering. The low and high frequencies of the audio signal can be separated and send to different speakers (woofer and tweeter). The audio chip used for this experiment is the TEA2025B, a somewhat older chip that was used in portable radio […]
I finally finished the Darth Vader voice changer this weekend. I took a belt with two snap hooks from an old bag. Next I fitted the box with the voice changer with two black screw eyes that were large enough for the snap hooks. The enclosure is now comfortable around the neck of a child. […]