STM8 DISCOVERY – 7segment serial link (1)

stm8 board posted by (C)takao21203 This is a STM8 Discovery board. I have added a PIC 16f884 and a small 7segment display. I want to program a serial link between the two controllers. Later, a display will be connected to the STM8 chip directly. However, I have some ideas to improve the 7segment decoding/driving, and it is easier to test … Continue reading

single cell dc/dc converter PCB BC327 PNP

this is a dc/dc converter PCB I designed a few years ago. One transistor, two coils, and some passive components. It is adjustable. prototype photo actual PCBs are infrared soldered. New revision of the dc/dc converter PCB! It has been tested from 1.2 volts to 5 volts input range. Small PIC circuits can be powered directly from 1.2 volts battery with … Continue reading

hitech trash

High-Tech Trash Will your discarded TV end up in a ditch in Ghana? By Chris Carroll National Geographic Staff Photograph by Peter Essick June is the wet season in Ghana, but here in Accra, the capital, the morning rain has ceased. As the sun heats the humid air, pillars of black smoke begin to rise above the vast Agbogbloshie Market. I … Continue reading

ewaste recycling facility wuhan china


This gallery contains 10 photos.

An employee sorts discarded computers at a newly opened electronic waste recycling factory in Wuhan, China. According to the US Environmental Protection Agency, e-waste is the fastest growing commodity in the waste stream, with a growth rate five times that of other parts of the business. Mounds of electronic waste pile up each day in Beijing’s Houbajia village as … Continue reading

new PIC 16f1824 PCB

32 MHZ MICROCHIP RISC MCU, brand new model 4K program memory, 256 bytes RAM, serial port capacitive sensing module, 10bit A/D can read and write to FLASH memory during operation NE555 emulator S/R latch PCB: DC/DC converter IC, 1.2 volts to 3 volts (5 volts possible) 4 LEDs (brand new high intensity type, ocean green, have 4.7k resistors) 1 Pushbutton