Questions tagged [resistor-ladder]

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1answer
122 views

Any way to build Analogue Multiplexers using MOSFETs or JFETs or BJTs

Here's my requirement: I need an analogue switch that can do SPST/DPST/DPDT with very low On-Resistance (<10mOhms). There would be current flowing through this switch, albeit in the range of a <...
1
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0answers
112 views

Applying a 1/3 bias to an LCD display spec'd at 1/2 still safe?

We're currently using an MSP430 with an integrated LCD controller that only has a 1/3 bias mode. The LCD display has a 2-mux configuration and the data sheet specifies "drive method: 1/2 duty, 1/2 ...
0
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1answer
51 views

Proving the output voltage of a resistor ladder only with usage of currents

I got the following problem. I would like to prove the the output voltage \$U_{aus}\$ of the following system. I only want to prove it by using currents. So I don't want to use the formula for a ...
3
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1answer
197 views

can I use a board that has resistor ladder buttons on raspberry pi?

I have a clock that has a circuit board with a resistor ladder setup for the buttons. I want to (disconnect the clock and) put a pi inside and use the buttons to control the pi. In normal use the ...
0
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1answer
162 views

Using resistor networks as voltage ladder

Are there resistor networks which could function as a pre-made voltage ladder? In other words are there variations on how the resistor network is assembled, ie in series or parallel? I've found these ...
3
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1answer
736 views

Designing a car steering wheel interface, need to distinguish between two resistor ladders on the same ADC

I am designing an interface for my car steering wheel to a Android head unit, using a Sparkfun Arduino Pro Micro to handle the USB side of things. The steering wheel buttons use three wires and a ...
0
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1answer
2k views

Resistor ladder with Same resistor value and different resistor value

Im trying to connect 8 buttons to Arduino Analog input. I found its good to use input shift registers. But with my very basic knowledge I end up with resistor ladder. But Im a bit confused with ...
1
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2answers
584 views

Logarithmically-spaced resistances using switches

If you want a linearly-spaced set of resistances, you can use a ladder of logarithmically-spaced resistors and short out different combinations, as described here. Is there a way to get a ...
0
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1answer
99 views

How to replace microswitches with electronic switches in a voltage / resistor ladder circuit

Hello everyone, I am relocating a pair of transmission control levers to a different location within a car. At present each lever actuates a pair of SPST microswitches (at the same time) ...
-2
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1answer
350 views

Are there electrically controlled precision rheostats that are not solid state

I need precision variable resistors for a programmable analog computer that I'm trying to construct. An analog computer requires variable resistors that can be set with precision. I don't want to ...
0
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1answer
72 views

How do you interface with this sensor? MPS-2100series

I am trying to figure out how to get a reading from this sensor. At first look at the schematic, it thought it was wheatstone bridge, but at a closer look, it appears to be a resistor ladder type ...
6
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3answers
271 views

Closed form expression for a resistor ladder network

Is it possible to find a closed form expression for the resistance between A and B for the general n-section ladder network, below, where all resistors are \$\small 1\Omega\$? An iterative expression ...
0
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2answers
1k views

Programmable gain instrumentation amplifier with R-2R ladder and analog multiplexer

I want to build a programmable gain instrumentation amplifier with power of two possible gains (1x, 2x, 4x, 8x...). Is there a way to use a R-2R resistor ladder and an analog multiplexer in order to ...
2
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1answer
596 views

How to “push buttons” on voltage ladder?

I have a quite simple task I can't wrap my head around. I have an old home 5.1 sound system with optical input that plays sounds from my media center. Its remote broke, and while I tried to fix it, I ...
0
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2answers
464 views

A simple digital current sink for a fuel gauge?

I need to simulate a 1200Ω fuel sender with an arduino, so I can control the fuel gauge. The fuel gauge has one wire which it supplies with an unknown current and voltage, where the voltage is no ...