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  1. M

    IR tester - suggestions?

    You are correct. I am not subjecting these PCB's to a real world scenario, so I cannot be 100% confident that they are perfect. The purpose of my device to give someone a visual indicator that they have not broken a cable or smashed a PCB while removing a large cumbersome assembly. The only...
  2. M

    IR tester - suggestions?

    Thank you for the suggestion. Your code looks so simple compared to mine, although I use the flowchart method. (yes, I am the one who cant be bothered to learn the real way of programming) I am using the ADC for two different functions. The first being a battery level indicator. You are...
  3. M

    IR tester - suggestions?

    I have been playing around to see what I can & cant get away with. After finding a document that told me only the X2 versions are suitable to run at 3.3 volts, I then gave up experimenting with 3 volts. I can get my circuit to run at 3v but this was not enough power to allow the computer to see...
  4. M

    IR tester - suggestions?

    Thank you for these suggestions. I would like something with an external access battery compartment, so people do not have to open the case.
  5. M

    IR tester - suggestions?

    This is larger than I was planning on, but it is the only case I have seen with a suitable size battery holder. Cheers
  6. M

    IR tester - suggestions?

    Thank you for your advise. Does anyone know of a source of handheld cases that have battery compartments that hold a suitable amount of AA batteries?
  7. M

    IR tester - suggestions?

    Just when I thought things were going in the right direction ............................ I can find a nice selection of handheld plastic cases that include a battery compartment, but only hold 2 x AA or a 9v PP3. The paperwork that came with my Picaxe starter kit states that a PP3 should not...
  8. M

    IR tester - suggestions?

    A very different question, if I may? I have got this circuit as simple as I think I can, using only 6 components. I would like to build a few of these using SMD components but do not want to add a programming jack & associated resistors to each one. Is there a recognised way of pre-programming...
  9. M

    IR tester - suggestions?

    I agree. At present if I use a cycle of 5s on / 5s off is it running at 1.7v @ 80ma. It is working and I can get the RX PCB to react. My worry is ......... if I am not driving it at the same voltage as the original controller, is my tester not giving it a real world signal to measure? UPDATE...
  10. M

    IR tester - suggestions?

    Thank you. I can see that I will only need a single transistor. Can you suggest a value for the gate resistor? Cheers
  11. M

    IR tester - suggestions?

    Just to get started, I am trying to build a circuit that drives the IR diode in exactly the same way as the original controller. Then worry about the testing the RX later on. I took two volt readings on the wires running to the two pins on the TX PCB. Fluke multimeter reads 2.6v DC, Picoscope...
  12. M

    IR tester - suggestions?

    This is a very good point that I had not realised yet.
  13. M

    IR tester - suggestions?

    Very good question. Always as a pair. Presently the only option to repair or diagnose a fault on this sensor pair is to remove a large assembly to get access. At this point the technician usually replaces both PCB's before installing and testing to see if the fault remains. If the fault is a bad...
  14. M

    IR tester - suggestions?

    I have some numbers and a huge gap in my understanding of IR! The controller is putting out to the TX PCB 2.2v square wave at 1Khz. The RX PCB is measuring 17v. This voltage is being sourced to zero when the signal is present. It would seem that (as suggested earlier) sending a signal to the...
  15. M

    IR tester - suggestions?

    For me, step one is always to get my hands on the stuff. The parts shown in the pictures are on my bench and I also ordered the correct connectors for them. I now realise from reading all the replies to my help request that I do not have enough information. I feel it would be wise to take a...
  16. M

    IR tester - suggestions?

    Still not been able to to take any reading from these while in use, as I do not have easy access to them(located in another part of the country). Pictures attached of the devices in question.
  17. M

    IR tester - suggestions?

    The RX PCB has only 2 connections. Home made schematic attached. I went to the trouble to draw it out but I cannot say I completely understand what its doing. I have not yet had the chance to measure the voltage across either PCB in a working state but my guess is that the RX will be sinking...
  18. M

    IR tester - suggestions?

    Both devices are connected via a dedicated harness that terminates on a 4 pin connector. Two pins for the RX PCB and two for the TX. TX PCB only holds a single IR transmitter. RX PCB has a simple amp circuit to boost output.
  19. M

    IR tester - suggestions?

    I am not sure on how to start this project, so I am looking for advise. This may be something that everyone already know lots about! I would like to build a tester to show that an IR diode is working correctly and its it is being detected by an IR receiver. Sounds so simple. Both of these IR...
  20. M

    Update from USB?

    Is it possible to build a PICAXE project that will automatically update its program if a valid file is present on a USB drive? I does not hurt to plan ahead!
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