Free Simple Circuit Diagram
Installing the camera in office, home, or the shop becomes economically feasible because the price of security camera going down. It is not efficient if we provide a dedicated monitor for every installed camera. If the CRT monitor is used to display static image from only one camera, it might suffer phosphor burn. So we need video switcher circuit to […]
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This is a light dimmer circuit. It has no fancy special feature, it is a a quite typical TRIAC based dimmer circuit. This circuit is only used to operate with non-inductive loads like standard light bulbs. Compared with the 120V AC above design, the triggering circuit is little bit improved. Besides that, this circuit is used to dim ligth bulb […]
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The window can be used to monitor a TEC operating temperature and indicate an out-of-range condition. To indicate an over temperature or under-temperature, this circuit uses the separated outputs. If the output’s logic is HIGH, the condition is over-temperature, if it is LOW, the condition is the TEC temperature is within its safe operating range. Here is the circuit : […]
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TEC is one of the cooler that was popular because of its robustness and maintenance free characteristic. This article shows one example of the TEC driver. To operate this circuit operates we need a single +5V supply and drives the TEC in the most preferred “constant-current” mode. It will deliver ±2A into a TEC. Picture below shows the schematic of […]
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