Digital Designs and Scientific Hardware - Open-Source Lab: How to Build Your Own Hardware and Reduce Research Costs - page 210

FIGURE 6.51 Geiger counter kit Gk-B.
FIGURE 6.52 Geiger counter kit GK-B5 assembled.
The events are counted and displayed as counts per minute and microSievert per hour (μSv/
h) as shown in Figure 6.53 by an ATmega328P microprocessor running preloaded software.
The data can be output to a computer via a serial connection.