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3774 Results for "Reverse Engineering Blood Glucose Monitors"

  • Ansmann POWERline 4 repair
  • Instructions     from Ansmann POWERline 4 repair
  • Finding out if the TOPSwitch II on an Ansmann charger (or similar) needs replacement can be tricky; the suggested test bench for determining if it works isn't readily available, and there doesn't seem to be any sources on simple checks that could be...

  • On voltage, current and power
  • Log     from A "Quick 220" clone
  • Some people have asked if this allows you to pull 30A from a 15A circuit. The short answer is "no." What confuses them is the conflation of units.There are three units of interest for this discussion:Volts. Volts measure the electrical potential between...

  • Wheelchair Tilt
  • Log     from Heather Accessibility Project
  • Heather got a new wheelchair a year or two ago with a tilt feature. It helps her pain immensely to be tilted back, and the control to tilt back is relatively easy for her to manipulate, so she stays that way most of the time. Unfortunately, she can't...

  • So it begins...
  • Log     from Open Source Maritime Instrument Project
  • This project emerged five years ago while trying to reverse engineer a forward looking sonar unit fitted to my work boat. The circuit board was dead simple and looked like a home etch job even though it was manufactured by a major military contractor...

  • Solar Water Pump
  • Instructions     from Solar Water Pump
  • Before connecting the Solar array to the Solar Pump System Controller we must connect a Circuit Breaker(CB) between them.1. Place 6 Circuit Breakers(CB) in a PVC Box.2. Connect the Positive wire from each string to one end of a separate CB.(Input of...

  • The Elusive Sum Gate
  • Log     from Tern - Ternary Logic Circuits
  • So I've been working on the Sum gate off and on for a little while and it's been a tough one. First it took me a while to find a combination of monadic gates that would give me the appropriate truth table. I won't bore anyone with the details but I worked...

  • Latest Circuit
  • Log     from Home Power Usage Monitor
  • It's been a little while since my last update. Haven't accomplished a whole lot since then, but I have updated the schematic to what will hopefully be a final "base" version. Anything added on will be in a later revision. So, this is what's changed:Fixed...

  • RSSI true diversity working
  • Log     from wireless microphone digital
  • I fixed the RSSI problem with// instance of the radio driver now called rf24RH_RF24 rf24module1(10, 2, 9); // pin 10 cs, pin 2 inturrupt IRQ pin on module, Nsel ( power ) pin 9 RH_RF24 rf24module2(11, 3, 8); // pin 11 cs, pin 3 inturrupt IRQ pin on module,...

  • Touchscreen Accquired
  • Log     from Buickberry Car Computer (Scrapped)
  • So despite a long period of project stagnation, I have made some punctuated progress in the last 2 weeks. I finally got around to ordering the 7" display and touch screen overlay, and it seems to work (more or less) as expected. I only say more or less...

  • More Progress.
  • Log     from Remote Control Land Strider
  • Finally got a few days to work on this thing again, and took advantage of it. Still beefing up the legs. The main push rods are doubled and have a clip that holds them together. That allowed me to build cups to keep the bearings in place. Works great!...

  • 10TFF-v2 received !
  • Log     from Yet Another (Discrete) Clock
  • Once again I got a great result with the batch I submitted to DirtyPCB. This time I chose a larger PCB (100×100mm) to test my idea of a universal module. I could fit 8 10TFF modules in one half of the PCB surface.Now I have to solder a few and test...

  • Digilent Nexys-2 Retired
  • Log     from Kestrel Computer Project
  • Well, I'm sad to say that I'm going to have to retire my Digilent Nexys-2 FPGA development board even before committing the first bitstream for the Kestrel-3 to it. It seems Xilinx WebPACK ISE refuses to run its license manager on 64-bit Linux, and their...

  • KCP53000 CPU Is Now FPGA Proven!
  • Log     from Kestrel Computer Project
  • I'm happy to report that I got the KCP53000 CPU and GPIA combination to actually blink an LED on the Nexys-2 FPGA development board!The CPU is clocked at 25MHz; when executing the following sequence of instructions:ledblnk: srli x3, x1, 24 ; 5 cycles...

  • Freewheel diodes
  • Log     from SPDT16: 16-bits arithmetic unit with relays
  • Electromechanical relays use an electromagnet. An electromagnet is a high value inductor. And inductors generate high voltages (and worse) when their power is removed.The traditional method is to use a diode acrosse the relay coil's pins. But I don't...
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