This is mini size intercom circuit. It uses IC Op-amp number LM380 just one as a result can work already. When switch S1 stay in a position speaks loud show in circuit picture. The loudspeaker of mother station will perform to is microphone for drive op-amp. By change step up transformer or T1. The switch […]
We like to collecting the electronic circuits with PCB layout as ideal of building the Easy electronic projects, under different scenarios.
The projects are mostly old but still works great. Suitable for use or to study.
Now, We have a lot of articles(over 600 circuits). So, difficult for find the circuit as you need. It is a pity if you close this site without the great experience.Recent New Posts
This circuit is formed maintain one’s position voltage from solar cell with , shunt regulator circuit. For protect voltage not too until much destroy battery. Because of something charger too much. The D2 be for protect current flow turn back from battery during nighttime. The circuit maintains one’s position current the few , for feed […]
This is Fuzz audio converter circuit. By use diode 2 pcs. in feedback circuit of OP-AMP IC , number LM324. I make for build way music sound that have unusual character. By limit output voltage , give a hand net between 0.7Vp-p waves square signal that is the result that is will proportionate big compose […]
This be Emergency power siren Circuit 6 watt sizes. It use Digital IC number IC 4011 perform produce the frequency pulse generator, be beep danger character. And have power mosfet wasp use a loudspeaker 8 ohm sizes and are large-sized loudspeaker. for have a voice as the last. For power supply Source use 12 Volt […]
This circuit be Basic Timer Circuit by use important equipment is FET 2N3819. By this circuit can can delay long ago arrive at 1.5 minute. Stand S1 at a position Reset an electric bell will loud. Totter S1 come back at time an electric bell will silent until time drag will stop electric bell talk […]
This is a Nicad battery charger circuit that old, but very effective. Because the principle of charging with Constant current And controlled by constant voltage. The high efficiency.Reduce anxiety on rechargeable batteries for a long time.We use a simple IC-7805 is that everyone must know. To control the constant voltage. We maintain constant current circuits […]
My friend bought a digital camera that can take pictures and videos as well. But he tell that it have restrictions is available not long the battery runs out. He did use an external battery, but the size 5 volts not had to modify the battery lead acid 12 volts reduced pressure down to the […]