Clik here to view.
How does the resistance of the load affects a voltage divider?
Every explanation I’ve seen so far about voltage dividers, only consider the two main resistors (that do the “dividing”), and pretty much ignore what happens after Vout. The circuits in the...
View ArticleClik here to view.
Clock divider circuit with flip D flip flop
I am using D flip flops in my clock divider circuit. I have started with one FF and moving up with the number of divisions I want to have in my clock. This is how I want my D ffs to work. Now I have my...
View ArticleClik here to view.
A simple voltage divider
I attended a workshop on troubleshooting and we were asked to find the flaw in the given circuit. A guy pointed out to the organizer that R3 was short ckt and R2 was open ckt. However I was pretty...
View ArticleClik here to view.
Digital Voltmeter – TriColor LED Output
I’m very new to electronics and I wanted to start with something that would hopefully simple, but also useful. I’d like to make a circuit that can read a DC input voltage (between 9V and 20V) and...
View ArticleClik here to view.
Reading Flow Meters from Mic Port
I am attempting to read two hall-effect flow meters through the audio-in (mic) port of an Android device. I want to be able to read both flow meters independently. The audio-in port is a standard...
View ArticleClik here to view.
Voltage shift 5V to 3.3V for PIC16LF145x 3.3V I/O input, several approaches
For USB device detection I need a way to shift that VBUS 5V to 3.3V in order being able to connect it as I/O input pin. The input pin should be high as long as VBUS = 5V, and low as soon as VBUS = 0V....
View ArticleWhich one is the better way to feed analog input to my ADC?
I am planning to use an AD7730L analogue to digital converter (ADC) chip, with a quarter bridge circuit. Everything was on the track until I realised something, which indicated that things were perhaps...
View ArticleClik here to view.
Can I use an op-amp in voltage follower configuration as variable voltage...
I see that this works in theory, but I my gut feeling says there is a drawback or caveat of which I’m not aware. Basically what I want to achieve is described best by the circuit diagram below....
View ArticleWhat current values are prone to noise?
I’m using voltage dividers to drop down from high voltages like 327V peak to 2.5V peak and read it with an ADC. (Also reading lower voltages like 5V from various sources, so the above was just an...
View ArticleUse GPIO to disable voltage divider
I’m using a voltage divider to read the battery level of a wireless sensor platform using STM32L151. I’m shooting to use 20k for R1 and 10k for R2, to be under the 50k limit of the MCU’s ADC...
View Article