Category: electronics

Last weekend I had a chance to continue with the next experiment. Make:Electronics suggests to set it up on the same breadboard that still has experiment 16 on it. This is for later experiments when the 555 timers will be chained. Again this is an easy experiment although I almost forgot all important connection between […]

This experiment (and the next experiments) are centered around the 555 timer chip. The circuit that been built (figure 4.14 of Make:Electronics) results in the monostable mode of the 555 chip. Once triggered the 555 emits a single pulse of a fixed duration. I lacked the required 5K linear potentiometer and I used a 2.5K […]

I spent several hours fault tracing the circuit from the intrusion alarm. I used the multimeter together with the minigrabber and checked the relay part of the circuit. I was able to measure the voltage over all the components and at first couldn’t find any problem. I decided to replace the transistor since the soldering […]

I completed the projectbox yesterday. It is looking good (well good enough) and I was eager to wrap-up the project. Just a few solder joints and it was finished. Before I started soldering, as I final test, I screwed the circuit board in the box and plugged in the power, I opened the magnetic sensor […]

I solved the problem with the circuit. I simply forgot to place a single wire that powers the coil. After this I was ready to solder the complete circuit on the Adafruit perfboard. I started with the noise making part of the circuit and tested it. Then I continued with the sensor and the relay […]

I had to scale down the circuit that I had built before because the perf board that I’m going to use is pretty small (Adafruit Perma-Proto 1/2 Sized Breadboard). I also decided to change the relay that I used for another type. I previously used the SRC-S-12VDC which works fine but the pin layout is […]

A couple of years ago I started working with electronics as a hobby. The reason was that it seemed cool to create electronics gadgets and learn about electronics in the process. I had limited training in electronics so I decided to start with simple electronics kits. These kits contain a PCB, electronic components and a […]