Now on instagram buy electric parts here Arduino modules, transistors, LEDs, ICs, radio parts, neon lamps A new LED lamp I made! 2x 3W chips, MT3608 booster, lithium battery from mobile phone power bank, USB charger TP4056. Using a wifi speaker globe as diffusor! It works quite well and the battery lasts about 24 hours.

STM8 DISCOVERY – 7segment serial link (2)

PIC 16f884 LED display posted by (C)takao21203 Using a PIC 16f884 here to test some new ideas. All the I/O bits are now freely mapable from tables. The TRISTATE is computated by the firmware.Actually these small displays are not very bright- or maybe there is a mysterious bug. STM8 circuit posted by (C)takao21203 Added some shuttle boards to the STM8 … Continue reading

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

big LED matrix project update


This gallery contains 4 photos.

Here some photos from the LED matrix. All LEDs wired up now to the drive circuit. 8 controllers run at once! Next thing is to replace the defective LEDs- quite a few. Then I want to try double buffering. But this does not require many new wires. It is however some effort to write the software for this. There will … Continue reading

first test, 32×24 LED matrix, 16f59

LED matrix – 16 brightness levels! It is all done in software. 4.5 Million machine cycles/each second. Each LED processed individually…and repeating continuously. Maxing out these 16f59 chips pretty much. First successfull test today. Todo: serial double buffering. Replicate the circuit 8 times. A lot of work to do. 2. Wire up the 32 bits master controller. Write some software … Continue reading