Search results

Search Forums New Posts
  1. CDRIVE

    Woo-woo projects.

    Hello everyone, first time here on Electronics Point. I'm a complete electronics nube so please be kind and gentle with me. I have a little project that I hope your experts can help me with. Resume: I'm an electronics student now. Not sure how much I comprehend but I've been the recipient...
  2. CDRIVE

    BT150 Thyristor equivalent(BT151) has just exploded !!!

    My friend this is not the way I trouble shoot. The period of hypothesis has expired. Answer these questions and or do what was asked of you. https://www.electronicspoint.com/bt150-thyristor-equivalent-bt151-has-just-exploded-t262310p6.html#post1565408 One of the perks of getting old is...
  3. CDRIVE

    Need help with a Power Failure Alarm Circuit

    Kris, that's because we're not aloof! ;) Chris
  4. CDRIVE

    BT150 Thyristor equivalent(BT151) has just exploded !!!

    They're not identical. BTW, you never did determine what caused it to pop in the first place. Chris
  5. CDRIVE

    BT150 Thyristor equivalent(BT151) has just exploded !!!

    we'll be waiting but why no pix??? Chris
  6. CDRIVE

    Need help with a Power Failure Alarm Circuit

    Reading through that thread the OP used an LDR to negate the NE2 flashing on +- cycles. The LDR is too slow to follow the perturbations. ;) Still, it's surprising that the NE2 emits enough light to drive an LDR but it did. Chris
  7. CDRIVE

    Need help with a Power Failure Alarm Circuit

    I finally found it but it was not here on EP. I didn't realize it was that long ago. I don't visit there any longer. The EP clan is a much friendlier group and this includes our mods and administration. I don't think they drink beer over at ACC. :D...
  8. CDRIVE

    BT150 Thyristor equivalent(BT151) has just exploded !!!

    We've asked this before but have not seen any...Photos! We need good pix of both sides of the PCB. Post the manufacturer and model number.Reverse engineering means drawing the circuit in reverse. IE, what you physically see on the board is drawn to print. What does the motor control? Chris
  9. CDRIVE

    Convert V to mV

    While all quite fascinating I still see no connection to your post title or description of goal. Where does Laser or RF transmission come into the equation? You're obviously intelligent, so I can't help but surmise that you're intentionally withholding vital information. Chris
  10. CDRIVE

    BT150 Thyristor equivalent(BT151) has just exploded !!!

    That's difficult to answer without seeing the schematic of the gate driver. Can you reverse engineer it? Chris
  11. CDRIVE

    Need help with a Power Failure Alarm Circuit

    I haven't but I and possibly you participated in a refrigerator/freezer thread where the OP wanted to use one of two integral neons to trigger a timer or something. One neon was a mains indicator. The other turned on when the compressor was running. This was the one he was interested. I think I...
  12. CDRIVE

    BT150 Thyristor equivalent(BT151) has just exploded !!!

    Yes, but I compared the specs between the 150 and 151 and the gate specs for the 150 are a good deal more sensitive then the 151. The 150 will trigger on a gate current of a mere 15uA and that's in the "Typical" column not the "Minimum"! Google the data sheets to read for yourself. Oh, I'm...
  13. CDRIVE

    Convert V to mV

    And BioMed electronics relate to a 10KM Laser, RF, or whatever transmitter how? Have you ever received radio signals on your guitar? Chris
  14. CDRIVE

    The Ultimate Tube RIAA-Amplifier?

    Roger, they're beautiful!!!!!! I think the wood model gave me a woody! Can't be sure at my age. :D Thanks for sharing them. Chris
  15. CDRIVE

    BT150 Thyristor equivalent(BT151) has just exploded !!!

    Are you saying that the DMM's Diode function worked on the BT151 as I originally thought it would?? I'll compare the specs between the 150 and 151 and get back to you. This PC is up again but don't know for how long. Chris
  16. CDRIVE

    BT150 Thyristor equivalent(BT151) has just exploded !!!

    Well, my laptop just shut down again so I'm on a backup PC. I just had a thought but I can't test it without my laptop. It will have cooled down and might reboot when I return from the watering hole. Anyway, here it is... You could probably get the DMM method to work on many thyristors if you...
  17. CDRIVE

    BT150 Thyristor equivalent(BT151) has just exploded !!!

    This is to EB and anyone else reading this thread: All my posts regarding DMM thyristor testing is all wet! I'm quite embarrassed by it too! :o Normally I sim everything I post unless it's so basic it doesn't warrant it. The fact is, most thyristors require far more gate current (Igt) to...
  18. CDRIVE

    Need help with a Power Failure Alarm Circuit

    Kris, thanks for posting that. Last night I had the brain power of a Beagle. It's all clear now! ;) I still think he should use an opto. Which begs another question... Why haven't any IC manufacturers ever packaged a NE2 type OptoIsolator? I've seen little neons that were about half the size...
  19. CDRIVE

    BT150 Thyristor equivalent(BT151) has just exploded !!!

    Elecbegginner, sorry to tell you this but the DMM method I posted will only work for very small T092 case type thyristors and they're not very common. I'm really beat right now but I hope I have the energy to explain tomorrow. The first circuit I gave you should work though. Chris
  20. CDRIVE

    Need help with a Power Failure Alarm Circuit

    Kris I'm quite burned out right now. Please draw what you're describing regarding the bridge. Thanks, Chris
Top