Have you ever searched for a simple description of what something is, but got even more confused after Googling it? Sometimes it takes very long for that “a-ha!” moment when you realise how simple it actually is.Well, we plan to fix that. We will try to describe a variety of technical objects and terms in …
In the past few years online casino gaming has taken over the internet and there is the reason why such a vast amount of people are following this trend without any signs of letting up.While games like Chess and Tic-tac-toe still remain classic titles that are played online, they lack one major thing: the ability to win …
Moyothi timer is a precision timer for C++ programs to measure events in microseconds. It also has a wait function, which differs from the normal sleep() function in that your program can still process messages while waiting. The timer function is very simple and uses the QueryPerformanceCounter() and QueryPerformanceFrequency() functions to return the time measured …
Background There seems to be a lot of confusion surrounding the practise of switching off your geyser on a daily basis. Some people claim huge savings, while others warn that you might even consume more electricity, but the general consensus seems to be that you won’t really notice a saving. Despite the fact that saving …
Can you save electricity by switching your geyser off on a daily basis? Read More »
Transistor Terminology A transistor has three legs: a collector, an emitter and a base. Below is the symbols for an NPN and a PNP transistor. NPN transistor https://web.archive.org/web/20081029225342/http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-2757683140936137&dt=1225340342608&lmt=1612436893&output=html&slotname=6542966663&correlator=1225340342602&url=https%3A%2F%2Fmayothi.com%2Ftransistors.html&ea=0&frm=0&ga_vid=852767767.1225340343&ga_sid=1225340343&ga_hid=1881404826&flash=0&u_h=864&u_w=1536&u_ah=834&u_aw=1536&u_cd=24&u_his=17&u_nplug=3&u_nmime=4 PNP transistor Transistors as switches The easiest way to understand transistors is to think of them as switches. You can switch a big current (between the collector …
The schematics can be downloaded here. The 5V supply The 5V supply is only used if you want to power the motor and receiver/servo’s from the main battery pack. Skip this part if you want to use a separate battery pack for the motor and the servo’s. The battery pack is connected to an LM2940 5v …
I bought a Pioneer radio and wanted to bypass the brake detection circuit to watch DVD’s. The unit has a wire that needs to detect nothing on the wire when you turn the vehicle on, and then a connection to Ground (handbrake on) before enabling the DVD player. On the internet you can find a circuit where they …
Servo’s also work with Pulse width modulation. The length of the pulse is between 1ms (fully left) and 2ms (fully right.) Of course I might be wrong about the left and right, but it boils downto this: 1ms is maximum one direction and 2ms is maximum the other direction. https://web.archive.org/web/20081029225342/http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-2757683140936137&dt=1225333568626&lmt=1612436589&output=html&slotname=6542966663&correlator=1225333568625&url=https%3A%2F%2Fmayothi.com%2Fspeedcontrol4.html&ea=0&frm=0&ga_vid=2101683390.1225333569&ga_sid=1225333569&ga_hid=58216249&flash=0&u_h=864&u_w=1536&u_ah=834&u_aw=1536&u_cd=24&u_his=13&u_nplug=3&u_nmime=4 You will notice two differences …
You can control the amount of power the motor gets by using a switch and turning it on and off very quickly. https://web.archive.org/web/20081204151759/http://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-2757683140936137&dt=1228386005879&lmt=1612436521&output=html&slotname=6542966663&correlator=1228386005879&url=https%3A%2F%2Fmayothi.com%2Fspeedcontrol3.html&ea=0&frm=0&ga_vid=463190824.1228386007&ga_sid=1228386007&ga_hid=1035464916&flash=0&u_h=864&u_w=1536&u_ah=834&u_aw=1536&u_cd=24&u_his=12&u_nplug=3&u_nmime=4&dtd=M If you want the motor to turn slowly, the switch is longer open than it is closed: If you want the motor to turn fast, the switch is longer closed than open: …
The easiest way to regulate the speed of an electric motor, is to decrease / increase the supplied voltage. This can be done by putting an adjustable serial resistor in series with the motor. https://web.archive.org/web/20081222213911/http://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-2757683140936137&dt=1230067431898&lmt=1612436424&output=html&slotname=6542966663&correlator=1230067431898&url=https%3A%2F%2Fmayothi.com%2Fspeedcontrol2.html&eid=6083027&ea=0&frm=0&ga_vid=1883978985.1230067435&ga_sid=1230067435&ga_hid=726046104&flash=0&u_h=864&u_w=1536&u_ah=834&u_aw=1536&u_cd=24&u_his=11&u_nplug=3&u_nmime=4&dtd=M This is exactly how my first ‘Scalectric’ speed control worked. It had a high-resistance wire wrapped around a core and …
