Postbag #10: apm sensor, uno ch340, cmp12, 10w led, iic oled
What's in today's post? APM2.5 Voltage and Current Sensor without Setting Perfectly Compatible T5 http://r.ebay.com/4jzLDV Version Board ATmega328P UNO R3…
1-day project: battery bank replacement in howling gale
Replacing old car batteries with gel batteries out of a UPS. Apologies for the wind noise - it was one…
Postbag #9: component tester, usb dinky, 3v pump, ferrite rings
The postman probably doesn't like me. Small 12864 LCD Transistor Tester Capacitance ESR Meter Diode Triode MOS LCR NPN http://r.ebay.com/w6qFLq…
Experiment: build your own 5200mah solar power bank
Build a better solar mobile power bank - will it work?
Postbag #8: nano ch340, usb 18650, 1.3 spi oled, hrc 10a
What's in today's post? Nano 3.0 Controller Board Compatible with Arduino Nano CH340 USB Driver http://r.ebay.com/IweCTD New USB 18650 Battery…
First look: arducam minimosd quadcopter on screen display pcb
A first look at the minimOSD. What does it do and how does it work? On-Screen Display OSD Board MinimOSD…
Postbag #7: 808 cam dvr, usb solar panel, 2x 18650
What's in today's post? Key Fob Ring Chain Spy Hidden Mini Camera DVR Keychain Cam Supports up to 32GB http://r.ebay.com/rVynrX…
Hubsan x4 quadcopter with 808 key fob camera payload
Can the Hubsan X4 quadcopter lift an 808 key fob camera? Just about. Key Fob Ring Chain Spy Hidden Mini…
Arduino mppt solar charge controller #20 – inductor discontinuous mode
Something I've wanted to do for a while is look at the waveform in the buck converter circuit.
Review: mppt-m20 solar charge controller #2 – a devious fraud
It's worse than I thought! Not only is this not MPPT, it's not proper PWM either and the temperature probe…