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Recent content by igru25

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    Driving MOSFET in battery powered circuit

    Hello all, I have prepared following circuit and I have troubles with MOSFET driving. Circuit info: VDD = 2.8V (two fully charged NiMH AA batteries) NE555N replaced by ST555CN (CMOS, from 2V power supply) IRLZ44Z replaced by IRL3705N Q2 MOSFET activated 1-2 times per minute for 0.1 second...
  2. I

    Adjustable impulse generator circuit. Need idea.

    Thanks. I found article about monostable 555 usage and it might work. But I want avoid extra IC (I plan battery powered device) and I have following idea (please see attached circuit). Idea is simple. Charge capacitor if schmitt trigger low (-1V) and discharge capacitor if schmitt trigger...
  3. I

    Adjustable impulse generator circuit. Need idea.

    Hello, I have made a circuit (strain gauge amplifier) - please see attached circuit. Non-inverting Schmitt trigger attached to the out of instrumentation amplifier works fine and generates signal (+2V at "high" state, and -1V at "low" state). So. Theoretically if we attach proper NPN...
  4. I

    [SOLVED] Strain gauge and instrumental amplifier

    I have used 0.1% tolerance resistors. Question - it is possible to avoid possible excitation ripple using battery supply (such as Lithium coin cells CR3032)? I will play a little bit with circuit... and if it won't work - i will use InAmp.
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    [SOLVED] Strain gauge and instrumental amplifier

    Hello! I am beginner in electronics and i try to make instrumental amplifier for my strain gauge. I have already made following circuit based on LM358, but i am not sure if it is OK. I apply multimeter between Vref (LM336) and output and see voltage jumping up and down - from 4mV to 1.2V...

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