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2 months ago | 
allaboutcircuits.com | Steve Arar |Mike Falter
Class F amplification is a well-established technique that uses harmonic tuning to improve the amplifier’s performance. In a Class F amplifier, odd harmonics are added to the collector voltage to shape it into a square wave. The collector current, which is ideally a half-sine wave, contains the fundamental and even harmonics. An inverse Class F amplifier, also known as a Class F-1 amplifier, swaps the shape of these waveforms.
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Dec 8, 2024 | 
forum.allaboutcircuits.com | Mike Falter
Hello everyone,I am restoring a defective MACAP/ELEKTRA bean grinder, probably type MXP. I could not find anything on the net about wiring diagrams and/or PCBs. Also no replacement parts, at least not for the generation of grinder that I have. I have the idea that there cannot be much that is defective. After all, it is a relatively simple circuit, at least that is what I thought…. On the circuit board I saw that capacitor C2 is probably missing.
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Dec 8, 2024 | 
forum.allaboutcircuits.com | Mike Falter
I work on a poultry farm and one of the daily tasks is to gather all the dead dispose of them. We grow 45lb heavy toms and I've been putting them in a wheel barrow which is pretty hard to push once you reach about 5 birds. We have a gorilla cart which has 4 pneumatic tires and is steerable. I would like to outfit this cart with an electric motor but need some advice on what motor to use as well as how to control speed. Any input would be great. Thanks
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Nov 30, 2024 | 
forum.allaboutcircuits.com | Dale Wilson |Mike Falter
Is there a poe add on to esp/at32/arduino/other, such that you stick the two on the end of a cat5/6 poe line and then have an ip you can query for n sensor data? Thinking sensor only, so low power signal only, no motorized / heating or anything. Have googled this plenty, quite a few 'nearlies'. Some things will have network stack, but need local power. Some will provide power, but seem to really be 'no comment' about network signal.
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Nov 29, 2024 | 
forum.allaboutcircuits.com | Mike Falter
I am trying to make a constant current source such that the current remains 1nA for load resistances 1-10Mohm. So that output impedance is high 1Gohm. but this is what i am getting any suggestions?
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Nov 21, 2024 | 
forum.allaboutcircuits.com | Mike Falter
As the title suggests, I cannot understand some characteristics of the RLC circuit in the case of electromagnetic induction. If the capacitor discharges a high voltage and little current into the coil, with a certain frequency, how is it possible to generate energy transmission by induction if the current is little? Is there a need for a power amplifier to also raise the current together with the voltage?
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Nov 18, 2024 | 
forum.allaboutcircuits.com | Mike Falter |Jake Hertz
Background. I have designed a ESP32S3 microcontroller based circuit (actually an ailtimeter) that is powered by a LiPo battery. The battery is connected to the ESP32S3 boards specific + and - pads, and the - pin is connected to the GND pin on the ESP32S3. The other components of the project are then powered by the 3v3 pin of the micro. All this works. To turn this circuit on/off I have a SPDT slide switch between the minus wire of the battery and the - pin of the micro.
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Nov 17, 2024 | 
forum.allaboutcircuits.com | Mike Falter
I have ~5 meters of differential pair carrying a digital signal and the gnd/0V for that signal. There is significant noise on both the digital signal and the gnd/0V for that signal. This cable runs 'backwards' in the system and so directly connecting this signal gnd to the local gnd leads to a nasty ground loop. This signal is DISABLE and is pulled via a 1kΩ to +3V3 at the source and via 100kΩ to +3V3 at it's 6x destinations.
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Nov 15, 2024 | 
forum.allaboutcircuits.com | Mike Falter
Greetings. Unsure if this should be in 'programming' or in 'software' subforums... move as deserved. Cannot find anyone to develop an application for 'smart' phone in my town. Trying to put together/customize something existing. A serial mobile data source needs to be saved in a server or two simultaneously, or sequentially...
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Nov 13, 2024 | 
forum.allaboutcircuits.com | Mike Falter
I have created many DIY power supply's & battery chargers in the past using various power adapters and cc / cv buck/boost converters over the years. Recently though I've been wanting to build some that have a more sleek / professional control interface... In the past I've used various panel mount voltage & current meters like the "PZEM" series or seperate cheap panel mount meters.
