A digital voice recorder circuit that used for voice recording and stored inside the IC. This circuit can keep the voice recording for approx. 100 years without power supply and repeat recording up to one million times. Technical specifications: – Power supply : 3-6VDC. – Consumption : 120mA max. @ 6VDC. – Recording time :…
TrxAVR-Picastar provides an alternative controller and user interface for a Picastar Transceiver. Picastar is a outstanding HF transceiver designed by Peter Rhodes, G3XJP. Picastar construction information, software and setup and operational instructions are available on G3XJP’s Picaproject Yahoo Group. The support group for Picastar is the Picastar-users Yahoo group. The support group for TrxAVR-Picastar will…
The WBR – A Simple High Performance Regen Receiver for 40M by N1BYT. Photo by AA7EE A few weeks ago when a sizable order of parts arrived from Dan’s Small Parts And Kits, the plan was to use them (along with the parts from a few smaller orders from kitsandparts.com and Mouser) as the basis…
My kids are learning Morse code this summer, so I threw together this little circuit to help them learn. And to make it more fun… It uses an ATtiny85 ($2.26 at digikey.com) to drive a piezo beeper (? $3.50 at Radio Shack.) The ATtiny85 takes 5.5V max, so I built the circuit on a piece…
# PCB size 75 x 49 mm up to our analog sequencer boards. # The entire control needs to be done by a small PIC 12F629/675, to save space on the board (the 12F series has only 8 pins, but that only 6 possible I / O ports for input and output). # A…