Frog Flash

D2 design for a sophisticated secondary flash-on-a-stick with optical slave circuit cobbled together with photo resistor out of printer and a high voltage triac from something else; works great....will use shortly for spring frog photo quest as peepers recover from recent very cold night....

35/100

Civil War reading; about of a third of the way through...

Web Server Audio Amplifier Interface Board

D3 work in process on interface board to be installed inside web audio amplifier chassis: includes 6 gain controlled amps, 2 shift registers, 12 bit ADC, 10bit DAC, 3 volume/tone control ics, 44amp HEXFET and connector (on right) for PIC-WEB.

Eprom Array Out of GPS

D3 prototype board with a pair of eproms out of a handheld GPS, interfaced through shift registers to Arduino processor with relays for switching programming voltage.