Analogue Sensors – Calculate the Nonlinearity Introduced by a Load or Pull Down Resistor
https://www.electronics-lab.com/analogue-sensors-calculate-nonlinearity-introduced-load-pull-resistor/
Tecwyn Twmffat @ instructables.com discuss about the notlinearity introduced by adding a pull down resistor and why you may get unpredictable readings from your ADC. For many years I found that I would get strange, unpredictable, readings from my sensor related projects at the maximum and minimum locations when using analogue digital convertors (ADCs). I […]
Simple circuit provides precision ADC interface
https://www.electronics-lab.com/simple-circuit-provides-precision-adc-interface/
Moshe Gerstanhaber @ edn.com provides an simple ADC interface using instrumentation amplifier IC. Real-world measurement requires the extraction of weak signals from noisy sources. High common-mode voltages are often present even in differential measurements. The usual approach to this problem is to use an op amp or an instrumentation amplifier and then perform some type of […]
Automatic monitor brightness controller
https://www.electronics-lab.com/automatic-monitor-brightness-controller/
Dilshan Jayakody build a auto monitor brightness controller that adjusts your monitor brightness according to lighting conditions. He writes: The sensor unit of this system is build around PIC18F2550 8-bit microcontroller. To measure the light level we use LDR with MCU’s inbuilt ADC. The control software of this unit is design to work with Microsoft […]
Analog Devices AD587KN 10V reference chip
https://www.electronics-lab.com/analog-devices-ad587kn-10v-reference-chip/
SteelCity Electronics published an article about Analog Devices AD587KN 10V reference: I recently got hold of an Analog Devices AD587KN high precision 10.000V reference chip. This model of chip has an output value of 10.000V ± 5mV (that is, an output value of 9.995V to 10.005V) straight out of the factory. A voltage drift of […]
DIY milliohmmeter
https://www.electronics-lab.com/diy-milliohmmeter/
by hwmakers.eu: This is an example of a simple and cheap milliohmmeter that can be made by every maker. The core of the circuit are a current source (LT3092) and a current sense (INA225): a costant current flows through the milliohm resistor under test and the voltage at the current sense output gives the value of […]
TC7106 – 3 1/2 Digit ADC for LCD Display
https://www.electronics-lab.com/tc7106-3-12-digit-adc-for-lcd-display/
The TC7106 3½ digit LCD direct-display drive analog-to-digital converter has a reference with a 80ppm/°C max temperature coefficient. TC7106 based systems may be upgraded without changing external passive component values to the TC7106A for a more precise system. High impedance differential inputs offer 1pA leakage current and a 1012 Ohm input impedance. The differential reference […]