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  1. Pharaday

    switch with indicator light

    OK so this eels like a dumb questionn but I took a SPST with an indicator light that is set up so that when the switch is on, it also completes the circuit on the indicator LED. The - wire on the indicator LED is connected to one prong and there is a 3rd prong for the indicator LED's + wire. The...
  2. Pharaday

    make this VU meter more sensitive, please

    I have money but I still get solder by torching the backside of the circuit board and banging it on a table and then gathering the little droplets. the older the circuit board the better. these SURFACE MOUNT circuit components are screwing me over in so many ways
  3. Pharaday

    make this VU meter more sensitive, please

    yea there are few designs out there that don't use any chips at all just zener diodes and transistors and resistors. I have 2 circuit diagram just like that in my documents waiting for me to find all the zener diodes out of my electronic component storage facility AKA a closet full of circuit...
  4. Pharaday

    make this VU meter more sensitive, please

    I have not harvested any of those chips yet. I'm getting around to building one out of just zeners and transistors etc but just as the old saying goes, I haven't done it yet.
  5. Pharaday

    make this VU meter more sensitive, please

    somebody gave me a tool box made out of plastic but inside of it was an inverter and a battery and the little plugs for connecting a solar panel. It had a button that when pressed, that circuit would indicate battery charge level but I it didn't need that and I wanted the button for something...
  6. Pharaday

    make this VU meter more sensitive, please

    hey guys here's this VU meter that I pulled off of an inverter battery combo, I'd like it to run off of the input from a little amp so anywhere between 2 and 10 volts should excite it. I can do that by changing out some of these resistors for a lower value, right? could you show me which ones? I...
  7. Pharaday

    e scooter power switch oddity

    guys what do you suppose would happen if you put a resistor between that positive and negative
  8. Pharaday

    e scooter power switch oddity

    lol https://www.amazon.com/gp/product/B07CSRGSHX?pf_rd_r=64J9FEWXVC1BNVTSRXNW&pf_rd_p=5ae2c7f8-e0c6-4f35-9071-dc3240e894a8&pd_rd_r=3b327f7a-a3b9-45c3-b9c6-86f537f55faf&pd_rd_w=WQNm0&pd_rd_wg=kVorj&ref_=pd_gw_unk theres the longlink. tomorrow when my brain comes back I can try to figure out what...
  9. Pharaday

    e scooter power switch oddity

    hmmmm ok. that makes sense, it just seems odd that the positive wire of the power switch is spliced directly onto the main positive wire that goes straight battery positive terminal (no battery management system). so basically to turn it on, I COULD just plug the negative wire of the power...
  10. Pharaday

    e scooter power switch oddity

    Hey guys I built an e scooter and everything works great but there's one thing I was wondering about. I bought a 48 volt 3 phase DC motor controller and in order to power on the scooter, there are 2 wires that must be connected using a switch. The thing is that when I connect my multi meter to...
  11. Pharaday

    With respect, in what way would YOU re-use these?

    BUT cleaning them is absolutely out of the question.
  12. Pharaday

    With respect, in what way would YOU re-use these?

    love the ideas except the 'sell them after having just bought them' ones. I paid scrap prices for them and i can buy more useful items without the need to sell them. $10 aint gonna make or break me. First thing I'll do is bolt them together at the bottom just how they sit in the picture then...
  13. Pharaday

    With respect, in what way would YOU re-use these?

    And please do only answer when you have time and when it would not interfere with your duties...... but I recently bought a couple of these for no other reason except they kinda look cool and I have a few ideas for neat repurposes but I'm curious..... and with the utmost of respect and...
  14. Pharaday

    help with dynamo on treadmill.

    Wow forum stumped again. Hey this is difficult stuff, afterall. Chins up lads!
  15. Pharaday

    help with dynamo on treadmill.

    well that's kinda the point of converting mechanical energy to electrical energy back to mechanical energy. Engineering the Absurd. also there's lots of neat reasons to have a little pedal you can generate power with. I'll just replace that Dynamo with a motor that I'm sure I could get some...
  16. Pharaday

    help with dynamo on treadmill.

    Also. This was a lifecycle 5500
  17. Pharaday

    help with dynamo on treadmill.

    Okay the capacitor is 35 volts. The little heat sink has LM 7808 CT. the big heat sink has a MT P3 0N05E R131, I don't recognize that one so I don't know which numbers were important. Yes I thought that to detect the voltage that I might have to disconnect it from the circuit but I can easily...
  18. Pharaday

    help with dynamo on treadmill.

    also what's that tall white thing?? .
  19. Pharaday

    help with dynamo on treadmill.

    Hey guys it's me again. I pulled a stationary exercise bike from the trash and it was one of those ones with a little dynamo on it so when you pedal it empowers the circuitry Etc. Well the Dynamo has multiple contacts and I can get positive from a few of them and negative from a few of them and...
  20. Pharaday

    help choosing inverter please

    Those batteries I linked are higher ah than the ones I have. I could not find mine online. Also, the system is for running household appliances like a fridge or AC, a PC , monitor, etc. oh I see that I prolly need a pure sine wave. Howabout this one...
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