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Recent content by Docara

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    [SOLVED] TI DRV8838 question - help with use and datasheet info

    Hi HTA, Thanks for the reply. Yeah, it was those tables (Tables 1 and Table 2) that have thrown me a bit - if both device's input were logic capable why mention PWM, I don't understand why have two identical devices doing exactly the same and having the same spec. (I'm picturing pulses being...
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    [SOLVED] TI DRV8838 question - help with use and datasheet info

    Hi, Admin - Please move if posted in wrong section. I'm intending to build a quick test bench to test a change in a hardware design and count the corresponding action. (The originating piece of kit uses a battery fed 3v DC motor which needs to be regularly reversed) I don't want to use a PWM...
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    TVS (Transil) Question

    Hi Klaus, thanks for the reply My appologies, yes you are correct - I just automatically assumed automotove to mean 12Vdc and continuous upto 14.4Vdc forgetting there are other values around. As a follow up question, could these be used (guessing different values) in place of the normal...
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    TVS (Transil) Question

    Hello All, I'm just starting to get the bits together for a simple automotive (marine) relay > fusebox > load project, and started to think about the specifics mainly around contact supression. Due to lengh of run I need to remotely switch on the 'ignition' fuses via a relay. My maximum load...
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    [moved] Help - Noise Filtering (power supply)

    Hi, Backgtround- I need to power a RF and logic switching board from a 12Vdc (automotive based) supply which feeds a water pump motor. The position of my intended project will be approx 2m away and the other side of a metal bulkhead even so I intend to use a FM based modules. Question- I...
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    Relay Usage Question

    Hi Tony, Thanks for the reply. Yes, I did consider the environmental conditions these range of relays has a fully sealed option (as does the G5V-2 alternative). These have Silver/Gold Bifurcated contacts Whats thrown me the curve ball is that statement from the datasheet. I can use...
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    Relay Usage Question

    Thanks for the reply The application I'm working on is for voltage sensing in a split charging system so I don't want any possibility of the contacts getting 'dirty' and not being 'cleaned' by a current flowing, so again I ask the question is 8hrs considered a longtime for these relays...
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    Relay Usage Question

    Hi, Just looking at the datasheet for the Omron G6A range of signal relays and read the following statement "Long-term Continuously ON Contacts Using the Relay in a circuit where the Relay will be ON continuously for long periods (without switching) can lead to unstable contacts because the...
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    [moved] Voltage Sources RQD - low load

    Thanks for the reply No, the LED doesn't need a regulated supply. Before I posted here I did a quick net search and found info saying that the Zener need a minimum load (over and above the normal series current limiting resistor) in order to operate so the LED / resistor combo which just there...
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    [moved] Voltage Sources RQD - low load

    Hi all, I need to supply two voltage for sensing purposes via a DP relay, for a third party device. I know nothing about the load (current) characteristics or input impedance of this device, but the input voltage is approx 11Vdc to 15.2Vdc Now (assuming the correctly chosen resistor values)...
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    PWM Motor Drive via PIC

    Hello All, Some pointers if you please its been years since I dabbled with electronics (bit rusty!!) and I just don't know enough about motor control electronics / good practice to allow me to complete a little project I'm working on. I have a 12vDC 'sensor' water pump in which the electronic...

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