This is a basic electronic ell circuit, it is interesting. We use a number of IC 741, it works. When you press S1 it will mimic the sound a bell,by can be fine with VR1, VR2 and VR3, to control sound as close as possible,by we set form audio oscillator generator circuit, sine wave form [...]
Looking for a general purpose, easy to interface temperature sensor for your projects? This is it! Whether you need to control heating and cooling of rooms or equipment, monitor temperatures in circuits, monitor your pool temperature, or simply put a temperature readout on your website, the K8067 fits the bill. With an accuracy of 2° [...]
When the remote control is not working, first check the battery before, It may be loss.If it is good,so detect transmit infrared light device.However, because the human eye can not see infrared light,so can not know how good or bad.But the photo transistor can use to detect infrared light. This circuit so use this photo [...]
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