Circuits & Schematics: -Wire Barometer 5/10 Volt Design vrs - 10

91. DC-accurate, 32-bit DAC achieves 32-bit resolution
    Stephen Woodward
    Circuits Measurement Analog Devices AD586 LTC1151
    .. ppm, or 23 bits. The precision of the AD586L 5 V reference, which is 500 ppm untrimmed, limits absolute accuracy. If your design requires greater accuracy, then you can use an Analog Devices simple trim circuit to further tweak it. ...
    Oct 21, 2024

92. To press on or hold off? This does both
    Nick Cornford
    Circuits Analogue Design Supply Texas Instruments CD4060B
    .. rather than a toggle/rocker/slide thingy, which may be cheap and reliable, but would look so last millennium. This design idea (DI) shows how to transform a basic momentary push or tact(ile) switch into a latching bi-stable device. ...
    Oct 16, 2024

93. Hack into a stopwatch to make a phototimer
    Ralf Kelz
    Circuits Measurement Beginners Everlight PD333-3C/HO/L2
    .. exposure tester in this Design Idea measures the on time of a light source, whether an LED, an incandescent lamp, a halogen lamp, or another ...
    Oct 15, 2024
94. Comparator directly controls power-MOSFET gate
    Peter Demchenko
    Circuits Analogue Design Texas Instruments LM193 LM7815
    .. for this hysteresis-isolation circuit to work. It would be incompatible with a totem-pole-output IC. Figure 3. The internal design of the LM193 comparator requires that you keep the input pins 2 V below the positive rail. Materials on the ...
    Oct 14, 2024
95. Improved PRTD circuit is product of EDN DI teamwork
    Stephen Woodward
    Circuits Measurement Diodes AP4310A
    .. I published a simple platinum resistance temperature detector (PRTD) design idea ( Reference 1 ) that was largely inspired by a deviously clever earlier DI by Nick Cornford ( Reference ...
    Oct 10, 2024
96. DC power wire also carries clock or data
    Mike Hardwick
    Circuits Interfaces Supply Texas Instruments LMC7211-N
    .. 1 depicts a subsystem that receives power from its host system and simultaneously transmits a clock signal back on the same wire. The circuit uses the clock in the remote system to modulate power-supply current via an open-collector driver or ...
    Oct 3, 2024
97. The power of practical positive feedback to perfect PRTDs
    Stephen Woodward
    Circuits Analogue Design Measurement Microchip LM4040
    .. contributor Nick Cornford recently published a delightfully clever design idea ( Reference 1 ) using a platinum RTD calibrated to output a 1 mV/ C signal that’s perfect for ...
    Oct 1, 2024
98. 20MHz VFC with take-back-half charge pump
    Stephen Woodward
    Circuits Measurement Texas Instruments SN74AC14 TLV9161
    .. (without K. Kong’s complexity) is (mainly) the self-compensating TBH diode charge pump described in an earlier design idea: “Take-back-half precision diode charge pump” ( Reference 2 ). We’ll get to that ...
    Sep 30, 2024
99. Electromechanical damping stabilizes analog-meter readings
    Alexander Bell
    Circuits Analogue Design Measurement
    .. shipping moving-coil meters, manufacturers may short-circuit the meters' terminals with a length of wire, which provides effective electromagnetic damping and results in better immunity to external mechanical vibration ...
    .. and results in better immunity to external mechanical vibration and shocks that can occur during transportation. This Design Idea applies essentially the same principle to analog meters under normal operating conditions. Connecting a ...
    Sep 30, 2024
100. DIY RTD for a DMM
     Nick Cornford
     Circuits Measurement Texas Instruments LM385-1.2
     .. of 0 C. Choosing the currents carefully gives a bridge output of 1 mV / C. PT100 RTDs, which use (precisely doped) platinum wire or film, are defined to have resistances of 100 Ω at 0 C and 138.5 Ω at 100 C. Using identical ...
     .. in pressure with height reduces water’s boiling point by about 1 for every 300 m increase. Check your altimeter and barometer and adjust accordingly. This ( Ref. 3 ) is a useful tool for doing so. Lastly, there is the DMM with ...
     .. tell us that frustration increases drive. I was driven to produce the circuit in this design idea by my increasing frustration with a collection of digital thermometers, all of which claimed accuracy to ...
     Sep 25, 2024

Sort by: relevance / date