.. resistor value*); single, non isolated voltage supply; one side PCB; compact construction allowed to use multimetr as panel meter; well interaction with standard LCD based on HD44780 controller *Internal MULTIMETR resolution is given by ...
.. is a successor of the PIC16C71 4-digit LED f-counter V-meter. Some hard to find parts used in the previous version, which are out of production for some time, has been ...
.. and CURRENT_STEP until the readings reported on the PC agreed with my voltmeter measurements. You need to be sure your meter is pretty accurate as the maximum charge voltage needs to be accurately maintained to ensure the battery takes ...
.. article shows how to build a small, cheap and simple frequency meter, without any fancy, out of reach components. The simple proposed design can measure frequencies up to 40 Mhz ...
.. up to 500MHZ. However instead of using a PIC and LCD, I am using a simple LM3914 Bar Graph IC for display of db levels. Meter may be powered from a 9V battery or external 12V DC adapter. A built-in 78L05 regulator is used to power ...
.. is any 2.4Ghz RF transmitted? Here are the details on how to build a general purpose 2.4Ghz Radio Frequency Field Strength Meter. This one was built using the microwave rated diode from a MICROTEK solid state microwave leakage detector ...
.. up and running. My girlfriend complained about it not having enough power to run her blow-dryer though. Here my volt meter is showing the turbine producing 14.5 volts in a stiff wind. Although the wind turbine powered the popup fairly ...
.. device is ideal for a circuit tracer, because your eyes can focus on the circuit paths you're tracing and not on a meter movement. If you want to find the connections to a circuit point, a useful technique is to attach a lead to ...
.. the wind once it started blowing. That's my excuse, and I'm sticking to it. This photo is a closeup of the electronics. The meter shows that the wind turbine is producing 13.32 Volts. My electric shaver and battery charger are providing ...
.. The battery should be pre-charged for easiest alignment. Point the panel at the sun, and monitor the battery voltage with a meter. Adjust the 20 turn 100K potentiometer until the Full LED starts to flash, then tweak the potentiometer until ...