Slaughterbots

Started by Anonymous in sci.electronics.design2 days ago 2 replies

Just in the nick of time... http://autonomousweapons.org/slaughterbots/

Just in the nick of time... http://autonomousweapons.org/slaughterbots/


eye-tube electron microscope

Started by Bill Beaty in sci.electronics.design3 days ago 10 replies

I just stumbled across: russian ILD3 tubes, CRTs without deflection, choose yer phosphor color red or green or blue. Apparently these are from...

I just stumbled across: russian ILD3 tubes, CRTs without deflection, choose yer phosphor color red or green or blue. Apparently these are from stadium-size color display (the pixels.) A couple of eBay sellers have them ~$10. Anode 7KV https://www.google.com/search?q=ild3 Use as electron microscopes! (Or at least show off some electron optics for physics classroom.) I bet they can ima...


Ping Spehro: P-Touch Label Tape

Started by Jim Thompson in sci.electronics.design3 days ago 10 replies

Hi Spehro, I believe you mentioned you use a P-Touch labeler? Time to replenish my cartridge stock. Are any of the non-Brother brands of...

Hi Spehro, I believe you mentioned you use a P-Touch labeler? Time to replenish my cartridge stock. Are any of the non-Brother brands of label tape of sufficient quality? Thanks! ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Anal...


OT mountain lion

Started by John Larkin in sci.electronics.design3 days ago 11 replies

This one (82 lb male) was tranquilized and captured a couple of blocks from here, deep in San...

This one (82 lb male) was tranquilized and captured a couple of blocks from here, deep in San Francisco. https://www.dropbox.com/s/d75t8nid5u2z3n8/ML2.jpg?raw=1 https://www.dropbox.com/s/wjl38xmhx01groh/ML4.jpg?raw=1 This link might work: http://www.sfgate.com/bayarea/article/Mountain-lion-spotted-cornered-in-San-Francisco-12348041.p hp This may be the same one that was spotte


Oldschool tubes

Started by bitrex in sci.electronics.design3 days ago 48 replies

Not exactly a sophisticated piece of test equipment, but lets you eject bad metal enclosure tubes early: (all the metal tubes in the...

Not exactly a sophisticated piece of test equipment, but lets you eject bad metal enclosure tubes early: (all the metal tubes in the 1935 table radio passed)


Zener SOAR

Started by John Larkin in sci.electronics.design3 days ago 21 replies

Well, there don't seem to be SOAR specs on zeners. I suppose I'll have to blow some up. -- John Larkin Highland Technology,...

Well, there don't seem to be SOAR specs on zeners. I suppose I'll have to blow some up. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com


ZVS Induction Heater Setup

Started by Matt Allen in sci.electronics.design3 days ago 3 replies

I have a 1000 watt ZVS induction heating unit (the Chinese one) and am a complete novice with electronics and may very kill myself, but I wanted...

I have a 1000 watt ZVS induction heating unit (the Chinese one) and am a complete novice with electronics and may very kill myself, but I wanted to set up a small aluminum smelting rig for small quantities of aluminum. Will I be able to achieve melting temperatures for aluminum if I pair a 500 watt 24 volt power supply with the 1000 watt rated induction unit?


Voltage dropper

Started by George Herold in sci.electronics.design3 days ago 19 replies

Hi all, so still futzing with my 'power' bipolar current source. here...

Hi all, so still futzing with my 'power' bipolar current source. here , https://groups.google.com/forum/?fromgroups=&hl=en#!topic/sci.electronics.design/XHnLmIX6dhY I made a voltage dropper with a string of 1n4002's (5) to reduce the negative rail on the INA134. This let me move the power opamp back inside both loops. (I think this is better 'cause it gets rid of any offsets caused by...


Small-scale BGA soldering

Started by Piotr Wyderski in sci.electronics.design3 days ago 128 replies

Do you try to do it on your own? How do you know all the balls are soldered correctly? X-ray checking is not a problem if the production scale...

Do you try to do it on your own? How do you know all the balls are soldered correctly? X-ray checking is not a problem if the production scale is high, but what do you do in the case of prototypes or batches of <


Analog MUX using discrete MOSFETs for flying capacitor cell measurement BMS

Started by P E Schoen in sci.electronics.design4 days ago 20 replies

My latest project is a battery management system (BMS) that can accurately measure cells in a lithium battery pack, and also perform shunt...

My latest project is a battery management system (BMS) that can accurately measure cells in a lithium battery pack, and also perform shunt balancing and possibly charge shuttling to balance the pack. I would also like to be able to use it for a pack of four 12V SLA batteries. A DG408 could be used to select up to 8 cell voltage taps from nominal 3.2V (LiFePO4) or 3.7V (Li-Ion), with a ma...


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