Search results

  1. halfwave

    Longwei power supply problems, anyone else have this?

    If your able and inclined you could ask for repair help over on eevblog. I blew mine up, researching found I just needed to replace an internal diode fixed it. Longwei probably makes all the power supplies that look like their models, they are an oem. Overall the Longwei is a decent low cost...
  2. halfwave

    Top balancing with Longwei power supply

    I believe its not critical outside of that one factor: without clamping the cell expansion can put stress on the terminals (threads) which are certainly weak. If you have a more flexible busbar than solid stock I think this alleviates the primary issue with cell expansion. As to any cell...
  3. halfwave

    Top balancing with Longwei power supply

    Gazoo has given great advice Alexander however one thing I notice from your picture above is the cells do not seem to be clamped together. Is that true? There is no doubt they have/will swell a little and may affect contact as Gazoo suggested above. In the future I would temporarily clamp a...
  4. halfwave

    Making leads for power supply

    Just make them yourself, don't use the banana plugs, use some kind of ring connector on each end. Being a junk collector I used salvaged 10awg stranded wires (out of old AC power cables) and crimped connectors on each end. Just make them as long as needed but not too long, you will have some...
  5. halfwave

    IOTA DLS-30 Sale

    There is a small trimmer type potentiometer inside the power supply by the cooling fan (see attached pic). With no load connected to the power supply use a voltmeter to monitor the output terminal voltage and adjust the pot to desired voltage.
  6. halfwave

    IOTA DLS-30 Sale

    Email from Electronic Goldmine today if you want a cheap bulk charger - $23 pretty cheap: SURPRISE - IOTA DLS-30 120VAC - 12VDC 30Amp Battery Charger / Power Converter (Max 1) Iota DLS-30 is battery charger / power converter that provides Dual-State charging allowing the unit to function as...
  7. halfwave

    First Small Buy 4 x Lishen

    Were you not able to find the credit card acceptance page? It has a step by step process to walk you through submitting what they want.
  8. halfwave

    First Small Buy 4 x Lishen

    Update: shipment arrived January 29th. Well packaged as others here have noted. All cells looked in brand new perfect condition. They put a label on each cell with their name and internal resistance (IR) you can partially see in picture below. I forgot to ask for extra bus-bars so I made some...
  9. halfwave

    First Small Buy 4 x Lishen

    Hello everyone, first post and I want to thank everyone for sharing their knowledge and experience here. In particular those that have written up their experience on how to order (like ghostwriter) and what to expect. A day ago I requested a quote for cells and provided basic shipment location...
Top