License

CC-BY 3.0

Tags
Recommend Projects

HP-65 & 67 Sense board

2 months ago 113
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Introduction

The Sense board in the HP-65 and HP-67 are part of the card reader circuitry.

To use this board desolder, the sense amplifying IC and resolder.

In the HP-65, a fixed resistor, and the HP-67, a trim potentiometer is used to set the speed of the card reader motor. Thus, this PCB can house a trim potentiometer in R1 or a fixed resistor in R2.

 

Connectors

As the PCB is quite small there wasn't room to mark the connection. Here are the connectors and their wire color.

J1

1 - GND Battery (Black) 

2 - V+ Battery (Red)

J2 

1 - GND Motor (Black)

2 - V+ Motor (Red) 

J3

1 - HAC (Orange)

2 - HA (Blue)

J4

1 - HBC (Yellow)

2 - HB (Red)

J5 GND (Black)

Pin 1 on PCB is square

Documents

HP-65/67 Sense Circuit TH

PCB_HP-65 & 67 Card reader logic TH

BOM

ID Name Designator Footprint Quantity
1 22uF C1,C2 CAP-TAN-S2.5 2
2 6.8uF C3 CAP-TAN-S2.5 1
3 Battery J1 M1X2 1
4 Motor J2 M1X2 1
5 HeadA J3 M1X2 1
6 HeadB J4 M1X2 1
7 Gnd J5 M1X1 1
8 10k R1 POTENTIOMETER_TRIMMER_VISHAY_T7YA_HORIZONTAL 1
9 5.1K R2 RES-TH_BD2.3-L3.7-P7.70-D0.9 1
10 10 Pin Connector U1 HP65-67-CARD-HEADER 1
11 HP1826-0158 U2 DIP20 1

Attachments

None
Success
The owner does not allow comments in this project now

Comments (0)

goToTop
你现在访问的是EasyEDA海外版,使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程,下载后在https://lceda.cn/editor 打开保存即可。
有问题联系QQ 3001956291 不再提醒
svg-battery svg-battery-wifi svg-books svg-more svg-paste svg-pencil svg-plant svg-ruler svg-share svg-user svg-logo-cn svg-double-arrow
We use cookies to offer you a better experience. Detailed information on the use of cookies on this website is provided in our Privacy Policy. By using this site, you consent to the use of our cookies.