Search found 2 matches
- Tue Nov 27, 2012 2:35 pm
- Forum: Geiger Counter
- Topic: Suggestions for next rev
- Replies: 7
- Views: 14589
Re: Suggestions for next rev
More suggestions: * Remove the 555 timer chip - replace its functionality with one of the ATtiny's timers. (reduce component count) * Replace the current limiting circuit with software auto-adjust. * [Replace MCU with ATmega32U2 - add USB programming, power and interface all-in-one] * [add slim SMD ...
- Tue Nov 27, 2012 1:23 pm
- Forum: Geiger Counter
- Topic: Suggestions for next rev
- Replies: 7
- Views: 14589
Re: Suggestions for next rev
I would suggest to include a 3.3V regulator from pin 3 of the serial connector as an additional power source. Why ? The FTDI TTL-232R-3V3 passes the +5V USB power to pin 3 (red cable). So you will be able to safely run the Geiger from USB power. I have already patched my device (see pic) geiger.jpg