HQM1286404 is pretty old graphical LCD module but it is still popular. This LCD is controlled by KS0108 lcd controller via two segment drivers. LCD backlight color is yellow-green. I think this is good choice for many projects where graphical … Continue reading
Category Archives: Free Hobby Electronics Circuits
Very simple IR detector that controls relay
The circuit of this Infrared(IR) detector circuit is a simple light relay which triggers when infrared light is applied to phototransistor Q1. This device can be used in control systems. When infrared light is OFF, Q1 transistor and relay K1 … Continue reading
Protect you car from rusting using cathode protection
Who has a car know that smal scratch may cause a rusting which will expand even under painted areas. And fight rusting id pretty hard tas. And so there are lots of methods that car keepers using. Ones are using … Continue reading
DIY 4x22W car audio amplifier based on TDA7384
So this time I decided to make pretty simple but powerful enough audio amplifier. For this I’ve chosen quad bridge car audio amplifier TDA7384 which has four input and four output channels with power capability 4x35W(4Ω). If connect to … Continue reading
Christmas is coming-time for web based Christmas Tree
Can anyone imagine Christmas without a Christmas tree – especially controlled via web. This is of course fun project, but I believe it needs some efforts to make it work. This is a part of Thomas Pheifer’s WebServer project. Circuit … Continue reading
Alternatives of MAX232 in low budget projects
Sometimes when you work on low budget projects of don’t want to go shopping for max232 or similar IC you can save your time and money by using other TTL to RS232 converter. We usually used to use MAX232 chip … Continue reading
Ease H-Bridge on MOSFET IRF7105 transistors
I think I don’t have to explain what is H-Bridge circuit. Well it is mainly used to drive DC motors that they could be run forward and backwards. Circuit often used in robotics. Usually there is a need to build … Continue reading
Connect Nokia 3310 LCD to LPT port
I found this circuit really simple and interesting. It is really simple to drive Nokia 3310 graphical LCD by using simple LPT cable and some PC software. Firs of all connect graphical LCD to LPT port according to following circuit: … Continue reading
Simplest dor-bell based on AVR microcontroller
This circuit is so simple and generated sound may look ugly, but from other hand this is good starting point for newbies with AVR projects. This circuit is made of one IC AT90S2313 (may be substituted by Attiny2313). Circuit is … Continue reading
How to measure wind direction
I found this wind direction measurement circuit simple and interesting. If you are doing some home automation project, this might be another sensor that can be included in you project. For Wind direction measurement you will need a circle from … Continue reading
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