Free electronic circuit design and schematic diagram
This is simple circuit for Guitar Pre-Amplifier. This circuit has some advantages such as it will work under tough conditions, very simple and has high input impedance. This circuit will not load down electric guitars because of the high input impedance. This circuit can be used to amplify microphones. Here is the circuit:A 9-volt battery is typically used as power […]
Read more
This is Attenuator Pads circuit. This circuit can be used when testing wireless network links to help simulate real life signal loss. This circuit can handle DC – 18 GHz, 2 watts of power, and have built in SMA connectors. The attenuator pads can be combined to increase the overall attenuation. a long length of high-loss cable, such as RG-174 […]
Read more
This is a Cable Reflection Tester circuit. This circuit can be used to check coax cable runs for shorts or even impedance mismatches. This circuit will send a pulse down the circuit, then the return signal can be checked on an oscilloscope. The distance can be determined by using this equation:distance = time x speed equations. Here is the schematic […]
Read moreThis is a video about remove solder using solder wick. This video shows step by step how to use a solder wick to remove solder. Put the solder wick to the solder are that want to be removed. Then heat it up. The solder wick will suck the solder like a sponge. Here is the video:
Read moreThis is how to solder a capacitor to a circuit board video tutorial. This video shows step by step how to solder a capacitor to a circuit board. The positive leg capacitor is longer one. Put the capacitor on the holes of the board and cut the lead of the component. After that, solder the capacitor using soldering iron. Here […]
Read moreThis is video about how to pretune a ham radio antenna. This video shows how to tune a ham radio. In this video, the antenna is tuned to make sure that the radio can have optimum performance. So the radio can get contacts from the ham radio. First, the lower frequency is tuned. Then tune the top band of the […]
Read moreThis is how to use a SWR meter video tutorial. This video describes about how to use SWR meter. The SWR meter has 3 switch, they are range switch, function switch, and mode switch. Beside that, the SWR meter also has calibration that is used to calibrate the SWR meter. How to calibrate the SWR meter is shown in this […]
Read more