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Recent content by esp1

  1. esp1

    Motion sensor with esp01

    Hi, The Rcwl-0516 microwave sensor, is a motion sensor, not a 'human' presence sensor. So if the human in the room does not move, the motion sensor output will be inactive. G
  2. esp1

    RC Snubber - help with sizing

    hi, This clip shows a typical snubber circuit with values. E
  3. esp1

    [SOLVED] Question about bi-directional voltage level translator.

    hi, I read the d/s for the LSF as per the attached clip from the d/s. Cref A = 4.5v max. E
  4. esp1

    [SOLVED] Ground connection antenna LTspice

    hi, Try the F4 COM symbol , ref image. E
  5. esp1

    what is the purpose of the core in inductors and transformer..

    hi T, Read through this link. **broken link removed** E
  6. esp1

    Active low pass filter

    hi K, A quick observation, the OPA outputs are not connected, where they cross is a dashed line --- E
  7. esp1

    [SOLVED] Audio Signal Coupling Capacitor

    hi, LTSpice sim frequency responseof your original circuit, it is awful, with a 220uF in place of the 220pF, still awful. I agree with fvm, the circuit wrong and well out of date. E
  8. esp1

    Adapter name and where can we find it?

    hi, It looks like an 'F' type coaxial RF type. https://www.ebay.com/sch/i.html?_nkw=f+type+connector+antenna E
  9. esp1

    Weighing Scale Design Problem

    hi bailey, A point to watch out when using a single supply voltage on the AD623 is the sense/polarity of the differential signal. When the differential input voltage is zero and the Vref is connected to 0v. , the AD623 output will be approx +0.5v, if you have the input sense driving it the...
  10. esp1

    Weighing Scale Design Problem

    hi, You are correct about the pin numbers, whoever created the AD623 model made a mistake in the numbering.!!!! The actual internal pin assignments of model are correct for the pin locations, but not the numbers, that is why the LTS works as it should. Did you set RV1 and RV2 as I suggested.? E...
  11. esp1

    Weighing Scale Design Problem

    What are the settings of RV1 and RV2.?? Try setting them both to their centre value, ie: wipers at 50%. You should then measure the mVoltage between the two wipers, try to make the voltage close to zero. Also you do not have gain setting resistor, R5 in my circuit. E Look at the pin numbers on...
  12. esp1

    Weighing Scale Design Problem

    hi, The AD623 INA is specifically designed to accept low level voltage differential signal inputs, that may have a 'highish' common mode voltage. E EDIT: This is an example. LTS simulation circuit
  13. esp1

    Weighing Scale Design Problem

    hi, You should consider a Instrumentation Amplifier,[ INA ] the AD623 will work from a single supply voltage. E
  14. esp1

    ADC6 and ADC7 in atmega328p

    hi H, The DIP 328 does not have the ADC6/7 pins, ref the datasheet. E I would say the 328 LIB's are written to cater for the lowest specification 328 ie: the DIP version, in order to ensure compatibility of the programs and hardware.
  15. esp1

    Reading channel B for HX711

    hi mr, My understanding is the Channel is selected after the first Read, so sending 26 clock pulses will select Channel 'B' at a gain of 32. The next 26 pulses will output Channel 'B' data. Normally I use 25 pulses in order to select 'A' at 128 and a Arduino lib for the HX. Which library are...
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