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  1. Fish4Fun

    Searching for Solder

    Just going to chime in on the "lead" stories ... I own a retail fishing tackle store @ the beach and sell lead sinkers ... for various reasons lead sales have been "down" for the last 15 years, but still we sell ~4000lbs a year. Back in the 80's/90's and early 2000's we sold over 10,000lbs a...
  2. Fish4Fun

    Need a diode ID for an LED lamp circuit

    Hey Boobtube! Before we start: Attempting to repair ANY AC MAINS CONNECTED APPLIANCE HAS THE POTENTIAL TO CAUSE: FIRE PERSONAL INJURY DAMAGE TO THE FIXTURE DAMAGE TO OTHER DEVICES CONNECTED TO THE MAINS Replacement of components w/o intimate knowledge about the circuit being modified is...
  3. Fish4Fun

    Force sensitive resistor controlling output voltage

    Hi shivasage! Ok, lets do a quick review .... In this very simple schematic: We have: 1) A 5V source voltage presumably with a negligible impedance. 2) A reference to ground, again, presumably with negligible impedance. 3) A 1 Mega Ohm potentiometer with the 5V source connected @ one end...
  4. Fish4Fun

    Ebike battery

    @Hopup ... I am NOT trying to discourage you from retro-fitting a bike to make it an ebike ... I am simply suggesting this process, like the ATMEGA boards, is "mature" ... thousands and thousands of hours have been dedicated to engineering and testing various solutions to achieve the finely...
  5. Fish4Fun

    Current sensing using Arduino

    @Karthik rajagopal You might consider adding a capacitor from the middle of the 2.2k Voltage divider to ground ... at the very least that should help sort out if the problem is on the digital side or the analog side. You might also consider one of these...
  6. Fish4Fun

    Force sensitive resistor controlling output voltage

    Hi shivasage, Welcome to EP! It might be better if you explain what it is you are trying to do. I am certain this seems self-evident to you; however, I have read through your post twice and I am clueless. While I don't think "regulating" is what you actually want to do, there is nothing...
  7. Fish4Fun

    Ebike battery

    @Hopup, I think what people here are trying to tell you is that in today's economy many things are cheaper in both cost and labor to purchase as an end-product or a "kit" specifically designed for conversion of an existing product than to attempt to engineer and build from scratch. Take for...
  8. Fish4Fun

    Ebike battery

    Hopup, If you are thinking of the cheap 18650 cells from ebay you will almost certainly be disappointed. There are a number of things you need to take into consideration With-Respect-To (wrt) battery packs in the KwHr+ domain. First you need to make 100% certain the battery array is...
  9. Fish4Fun

    Back to Back Schottky Diodes

    @ bertus Thanks ... I couldn't see how figure 2 could do anything useful; however, I have thought that about several things over the years and been wrong. If the Ti white paper had simply used the phrase "anti-parallel diodes" then I would have known exactly what they meant ... "Back to Back"...
  10. Fish4Fun

    Back to Back Schottky Diodes

    I am designing//building a "heavy duty" amplifier for a sensored BLDC motor (referenced here https://www.electronicspoint.com/forums/threads/sensored-bldc-motor-question.292730/ ) and am trying to decide how "isolated" it needs to be from the control system ... So, I have been reading up on...
  11. Fish4Fun

    Looking to make brightest 1 metre of LED's with Sony NPF lipo battery

    Hey alex ezorsky-lie ! Most LED strips use resistors to limit the current from a nominal voltage (typically 12Vdc or 24Vdc commonly found in cars and boats). In these applications "saving power" with respect to LED lighting is meaningless, and the (rather significant) losses added by resistive...
  12. Fish4Fun

    Sensored BLDC Motor Question ...

    So I ordered one of these: https://www.ebay.com/itm/4600W-6384-120KV-BLDC-Outrunner-Sensored-Brushless-Motor-For-Electric-Skateboard/164069170610?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649 I am attempting to build a driver for it, but I expected the sensors to have outputs like...
  13. Fish4Fun

    Strong slide switch

    @Nanren888 .... I think the effect he is after is the way the "Up/Down" arrows work on a TV remote to change the channel ... at some point you "run out of channels" and cycle back to the first channel ... obviously he wants this in an analog switch and instead of a "channel", position.0 = off...
  14. Fish4Fun

    How can i decode the IR protocol from these details?

    I missed this second post .... If the timings are already in Micro Seconds then my numbers are off by 1/2, but the general advice and approaches remain sound. As Nanren888 suggests, there is almost certainly a "single value" used to derive all of the various bit timings. For instance Base...
  15. Fish4Fun

    How can i decode the IR protocol from these details?

    @wouder1 There are several basic IR protocols and each of these basic protocols can have a myriad of variations ... Most major Electronics companies (ie Sony, RCA, Phillips etc) tend to use a base protocol across a wide range of devices, some include device specific headers, redundancy checks...
  16. Fish4Fun

    PAL 16R6APC .....

    @Harald Kapp Thanks! That is actually the collection of pages from which I was able to (eventually) find a link to the data sheet referenced above ... Further reading made me realize that the entire "PAL Family" from the 80's & early nineties were (best I can tell) One-Time-Programmable...
  17. Fish4Fun

    PAL 16R6APC .....

    Have a ton of work I really need to be doing, so I thought I would look through some of my "miscellaneous" IC Bins and see what forgotten treasures they might contain ... I vaguely remember reading about PALs sometime back in the last millennium .... they were going to replace "Standard"...
  18. Fish4Fun

    H BRIDGE FOR DC MOTOR CONTROL

    @Kuberan, Assuming the high-side switching device is in-fact an N-Channel mosfet; I don't know how the high-side Mosfet would ever turn on ... the data sheet shows the IRF3205 has a gate threshold Voltage (Vgst) of ~4V. This would imply you need a minimum gate voltage of 16V (with respect to...
  19. Fish4Fun

    using Diodes/NC switches as Motor Limit switches.

    I think this is the most likely configuration: This configuration allows for the motor voltage to be different than the control voltage, doesn't require the limit switches or the control switches to switch the motor current and uses the diodes as Back-EMF clamps which is the most logical...
  20. Fish4Fun

    Low Power Embedded DC supply from 120Vac Mains

    I want the 5V supply to power an ATTINY2313 to provide PWM dimming capabilities to an AL9910 used to drive a 3 series X 4 parallel array of LEDs, rated @ ~12Vfmax 900mA Imax. I realized somewhat late bound that I could use the AL9910's externally available internally regulated Vdd (max 1mA) for...
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