Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

ENC28J60 Ethernet Controller with PIC18F4620 Microcontroller

Did you know that the ENC28J60 is Microchip’s first incursion into the Ethernet controller field? Well, some of the interesting features of the ENC28J60 are included: MAC & PHY IEEE 802.3 10BaseT functions, 8KB of dual access RAM packet buffer, A SPI serial interface. It only takes just few components to get the ENC28J60 up, running and connect to a host microprocessor/microcontroller with support. Today’s project is implementing the ENC28J60 Ethernet Controller with PIC18F4620 8-bit microcontroller through the Microchip’s free TCP/IP stack. The PIC18F4620 with 40-pin is definitely the suitable microcontroller to be used in the project, due to its additional program and RAM memory space. Since the ENC has 3.3V Vdd supply, one of the best alternatives is to use a 5V Vdd for the MCU. In this case, the level conversion is required for at least the signals from the ENC to the MCU, no conversion is necessary on the other way, as the ENC inputs are 5V tolerant but a small resistor in series is highly recommended to reduce undershoots problem. Hence, for the project, you’ll need… Continue reading

Would You Mind to Have a Portable Universal Radiation Spectrum Analyzer?

Do you know what is the heck of this “URSA” was? Well, URSA is stands for “Universal Radiation Spectrum Analyzer” and it’s a very useful tools, which we can simply applied it into the: Bulk sample analysis Air sample analysis Wipe sample analysis Environmental monitoring Remote monitoring Portal monitoring Nuclear medicine Health physics Thyroid assay Homeland defense You can determine the quality of a URSA, by simply refers to its low noise design feature. The lower the noise level will constantly allows much higher gains to be used. In addition, the noise level will also greatly affect the detection of peaks at the very low end of the spectrum as well. Below here are some of the key characteristics for a high quality URSA: The low noise design (the lower the better), good low end resolution. Exceedingly Fast response, even for short counting times. The stand alone feature means no need to relate with other tools for operation. The Onboard 256K Byte memory (this for the storage of 4096 channel spectra). The 16 full spectra with 32 bit count per… Continue reading